Go Back  Bike Forums > Bike Forums > Tandem Cycling
Reload this Page >

Di2 & Discs

Notices
Tandem Cycling A bicycle built for two. Want to find out more about this wonderful world of tandems? Check out this forum to talk with other tandem enthusiasts. Captains and stokers welcome!

Di2 & Discs

Old 06-29-15, 08:57 AM
  #51  
tandemraw
Junior Member
 
Join Date: Jun 2015
Posts: 22

Bikes: Landshark 2016, Comotion CoPilot 2000

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Chris_W View Post
With the 11-40 11-speed cassette, you could get a similar gear range to what you have now with a 50-34 double crank.
What's a good way to get a 50-34 double crank, if we want 130 BCD on the timing side in order to run a belt drive? I'm asking in the context of getting a new bike, so all parts are open at this point.
tandemraw is offline  
Old 06-29-15, 10:16 AM
  #52  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,331 Times in 839 Posts
- Gates Carbon Drive Belt System

the 50-34 is just the chain driven crank on the right side of the Rear BB. a square Taper BB really is Neutral

as to what crank is installed on the ends.. work with your tandem bike builder to get the parts that all work together.

the 2 toothed belt cogwheels and the Typical front Eccentric BB will tension crossover belt and chain alike.


- Gates Carbon Drive Belt System
fietsbob is offline  
Old 06-29-15, 10:34 AM
  #53  
waynesulak
Senior Member
 
waynesulak's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, TX
Posts: 1,971

Bikes: Custom 650B tandem by Bob Brown, 650B tandem converted from Santana Arriva, Santana Noventa, Boulder Bicycle 700C, Gunnar Sport

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Another option. I have not used it but know one guy is happy with his. Basically shimano compatible double or triple bar end shifters grafted to brake levers to make a combination unit. Available as 9, 10 or 11 speed.





CX Shifters for Road Derailleurs & Short Pull Brakes - Gevenalle
Attached Images
waynesulak is offline  
Old 07-06-15, 08:44 AM
  #54  
oldacura
Senior Member
Thread Starter
 
oldacura's Avatar
 
Join Date: Nov 2006
Location: Lafayette, Colorado
Posts: 1,042

Bikes: 1998 Co-Motion Co-Pilot, 2015 Calfee Tetra

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
I have thought about this some more but still have not yet come to a decision. I've been riding my single road bike (ultegra derailers, brakes & brifters) as well as our tandem (ultegra derailers, V-brakes, 287V brake pulls and bar-end shifters). I never paid much attention to this but I think our tandem shifts better than my single. Maybe the reason that people are so taken with Di2 is that they work so much better than brifters. When brifters first came out, I thought it was a bit of a solution looking for a problem. They really don't shift as well as dedicated shifters. I think the best shifting bike I ever had was with downtube shifters. This provided a very direct mechanical connection with the derailers. The bar-end shifters on our tandem are not as quick as downtube shifters on a single but they are pretty close. The right/rear shifter is click-bang click-bang. The left/front is less direct but it is infinitely trimable and we rarely have noise issues. I've never tried brifters on a tandem. Maybe this is what people are trying to fix with Di2. I don't think that I would want to ride a tandem with downtube shifters but the bar-end shifters may be the most direct mechanical link with the derailers and still be able to keep both hands on the handlebars.

Maybe the best compromise if one wants a wide range and rapid shifting is to go with bar-end shifters.

Has anyone ridden a bike with V-brakes with dedicated brake pulls and compared this to caliper brakes with brifters? Is the latter setup as good (or better) than the former? I may be with Zonatandem on this one.

Last edited by oldacura; 07-06-15 at 08:45 AM. Reason: More thought
oldacura is offline  
Old 07-06-15, 09:00 AM
  #55  
Trsnrtr
Super Moderator
 
Trsnrtr's Avatar
 
Join Date: Jun 2002
Location: Central Illinois
Posts: 21,232

Bikes: Giant Propel, Colnago V3, Co-Motion Supremo, ICE VTX, ICE VTX WC

Mentioned: 104 Post(s)
Tagged: 1 Thread(s)
Quoted: 9260 Post(s)
Liked 2,691 Times in 1,303 Posts
I installed Microshift 9 speed brake/shifters on our 2002 Santana Sovereign about 400 miles ago. I've used their bar ends on other bikes and was impressed with the shifting and these shift well, also. However, it's another shifting combo to get used to despite being Shimano compatible because they use a different combination of levers and buttons to shift.

I have to admit, though, that I like bar ends the best on tandems.
__________________

-Dennis T







Trsnrtr is offline  
Old 07-07-15, 08:52 AM
  #56  
oldacura
Senior Member
Thread Starter
 
oldacura's Avatar
 
Join Date: Nov 2006
Location: Lafayette, Colorado
Posts: 1,042

Bikes: 1998 Co-Motion Co-Pilot, 2015 Calfee Tetra

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
I have re-read earlier posts in this thread and I think I may have come full-circle on my understanding and possible choices. I assumed that if we went with Di2, we would sacrifice range. Now that I realize that we rarely use our small chainring (it is a bail-out gear), with correct cog selection, we may only give up a bit of top-end.

For those that have Di2 & hydraulic brakes, are you using the integrated Shimano Ultegra Di2 with hydraulic levers? I think I read that you are using 180mm rotors right? Is Calfee willing to use these on their tandems even if Shimano hasn't blessed it? Has anyone with Shimano hydraulic brakes overheated them on a big descent?

Thanks again for your help & experience.
oldacura is offline  
Old 07-07-15, 11:01 AM
  #57  
DubT
Senior Member
 
Join Date: Sep 2009
Location: Central Illinois
Posts: 1,166

Bikes: Trek Speed Concept 9.9, 2011 Calfee Tetra Tandem

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 40 Post(s)
Liked 15 Times in 8 Posts
Originally Posted by oldacura View Post
I have re-read earlier posts in this thread and I think I may have come full-circle on my understanding and possible choices. I assumed that if we went with Di2, we would sacrifice range. Now that I realize that we rarely use our small chainring (it is a bail-out gear), with correct cog selection, we may only give up a bit of top-end.

For those that have Di2 & hydraulic brakes, are you using the integrated Shimano Ultegra Di2 with hydraulic levers? I think I read that you are using 180mm rotors right? Is Calfee willing to use these on their tandems even if Shimano hasn't blessed it? Has anyone with Shimano hydraulic brakes overheated them on a big descent?

Thanks again for your help & experience.
if you do not require low climbing gears then why would you consider disc brakes? Can you live with a wide ratio cassette? KISS!
DubT is offline  
Old 07-07-15, 11:03 AM
  #58  
DubT
Senior Member
 
Join Date: Sep 2009
Location: Central Illinois
Posts: 1,166

Bikes: Trek Speed Concept 9.9, 2011 Calfee Tetra Tandem

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 40 Post(s)
Liked 15 Times in 8 Posts
Originally Posted by Trsnrtr View Post
I installed Microshift 9 speed brake/shifters on our 2002 Santana Sovereign about 400 miles ago. I've used their bar ends on other bikes and was impressed with the shifting and these shift well, also. However, it's another shifting combo to get used to despite being Shimano compatible because they use a different combination of levers and buttons to shift.

I have to admit, though, that I like bar ends the best on tandems.
i tried bar ends on an earlier tandem and did not feel comfortable with them. I ride most of the time on the hoods and did not like moving my hand to shift. It felt a little unsafe for me.
DubT is offline  
Old 07-07-15, 11:45 AM
  #59  
akexpress 
Senior Member
 
Join Date: Nov 2007
Location: Anchorage, Ak
Posts: 619

Bikes: 2015 Calfee Tetra tandem,2016 Calfee Tetra Adventure Tandem, Ventana ECDM 26 mtn tandem, Ventana ECDM 29r full suspension Mtn tandem ,Ventana Fat tire tandem, Calfee Dragon Fly, Santa Cruz Carbon 5010, 907 Whiteout fat tire

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 57 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Originally Posted by oldacura View Post
I have re-read earlier posts in this thread and I think I may have come full-circle on my understanding and possible choices. I assumed that if we went with Di2, we would sacrifice range. Now that I realize that we rarely use our small chainring (it is a bail-out gear), with correct cog selection, we may only give up a bit of top-end.

For those that have Di2 & hydraulic brakes, are you using the integrated Shimano Ultegra Di2 with hydraulic levers? I think I read that you are using 180mm rotors right? Is Calfee willing to use these on their tandems even if Shimano hasn't blessed it? Has anyone with Shimano hydraulic brakes overheated them on a big descent?

Thanks again for your help & experience.
On a road tandem with drop bars to use hydraulic brakes and DI2 the only choice is the integrated levers. Calfee is building many tandems with hydraulic brakes and until just recently used 203mm rotors on the rear. They are now recommending 180mm rotors. We are still using 203 XTR rotors without issues. Calfee recently (last fall) changed their frames and added an additional strut between the seat stay and chain stay to better distribute the loads these brakes can generate. When we built our new frame i chose to use a thru axle fork and thru axle rear dropouts to further distribute the load across the frame. Last year in Europe we did some rather large descents with only the rear Shimano hydraulic brakes and had no issues with overheating it. It should be even less of an issue with both front and rear. FWI I don't think there are any true tandem rated brakes out there and if so what is the rating based on? As far as range if you pick the right crankset you can have whatever range you want. Pick a crankset with interchangeable spiders and make it whatever you want within the parameters of a double. 40/34 is proven to work for a low end using the XTR 11-40 cassette and a K edge rear deraiileur mod and a 11-52 or greater on high end is possible, although not at the same time However a 40/34 and 11/50 can be achieved with the same setup. With just an extra chain and a different cassette one can quickly go from a flat land setup to mountainous setup in a matter of minutes. Does one need either DI2 or hydraulic brakes obviously not, but do they work, absolutely . I/we will never go back to mechanical shifting or rim brakes.
akexpress is offline  
Old 07-07-15, 01:30 PM
  #60  
colotandem
Senior Member
 
colotandem's Avatar
 
Join Date: Oct 2007
Location: Golden, CO
Posts: 366

Bikes: n+1

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Liked 1 Time in 1 Post
Originally Posted by oldacura View Post
I have re-read earlier posts in this thread and I think I may have come full-circle on my understanding and possible choices. I assumed that if we went with Di2, we would sacrifice range. Now that I realize that we rarely use our small chainring (it is a bail-out gear), with correct cog selection, we may only give up a bit of top-end.

For those that have Di2 & hydraulic brakes, are you using the integrated Shimano Ultegra Di2 with hydraulic levers? I think I read that you are using 180mm rotors right? Is Calfee willing to use these on their tandems even if Shimano hasn't blessed it? Has anyone with Shimano hydraulic brakes overheated them on a big descent?

Thanks again for your help & experience.
I don't think you really have to sacrifice range (maybe if you really like that big 54t chainring). When we spec'd out our most recent tandem, I had a similar thought process that you are going through. We were coming from a 52-39-30 cranks with 11-28 cassette. I wanted to go with Di2, but was unsure if I'd like the range and a wider range cassette. So rather than invest in the $$ electronic shifting, I had the frame spec'd to accommodate the wiring but used 2x10 mechanical shifting with the thought that I would convert later as the price of electronic shifting came down.

A couple year later, I'm still using the mechanical shifting (Sram 2x10 52-34 with 11-36 cassette). No issues with this set up the low end gearing is actually lower. We live in Colorado too and do our fair share of climbing, so it is a fair representation for you. I currently have the bike set up with caliper brakes but have also run rear disc.

I still may go electronic at some point. Most that have ridden with electronic shifting swear by it and don't want to go back (I think Rudy may be the exception). If I were to go electronic, I'd probably change the chainrings to 52-36 and MAYBE go to 11-40 cassette, but could likely still get away with 11-36 cassette. It is nice to have less than 1:1 ratio as a bail out.
colotandem is offline  
Old 07-07-15, 02:07 PM
  #61  
oldacura
Senior Member
Thread Starter
 
oldacura's Avatar
 
Join Date: Nov 2006
Location: Lafayette, Colorado
Posts: 1,042

Bikes: 1998 Co-Motion Co-Pilot, 2015 Calfee Tetra

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Thanks colotandem.

I'm a late adopter. I really appreciate early adopters. Without them, technology wouldn't move forward.

If we do go for a Calfee, this would be a huge leap for us: To go from a 17 year old steel Co-Motion to a brand new carbon fiber Calfee is a big jump. I want to embrace the latest proven technology. This will be a very expensive bike for us but I don't want to cheap out and settle for less than optimal choices. I know that there is no best - just what compromises are best for the chooser.

Mel at Tandems East is suggesting 3x11 mechanical derailers and cable operated discs. Many here are pretty adamant about going all the way to Di2 & hydraulic brakes. Mike at Calfee is pushing toward Di2 and rim brakes. There are many strongly held opinions. I'm just trying to decide what might be best for us.

By the way - in your avatar - it looks like there is a sign above you heads. I can't read it but I assume it marks some pass or high point. Where is this?
oldacura is offline  
Old 07-07-15, 03:08 PM
  #62  
colotandem
Senior Member
 
colotandem's Avatar
 
Join Date: Oct 2007
Location: Golden, CO
Posts: 366

Bikes: n+1

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Liked 1 Time in 1 Post
Originally Posted by oldacura View Post
Thanks colotandem...


By the way - in your avatar - it looks like there is a sign above you heads. I can't read it but I assume it marks some pass or high point. Where is this?
That photo is from Mt. Ventoux.
colotandem is offline  
Old 07-07-15, 04:38 PM
  #63  
akexpress 
Senior Member
 
Join Date: Nov 2007
Location: Anchorage, Ak
Posts: 619

Bikes: 2015 Calfee Tetra tandem,2016 Calfee Tetra Adventure Tandem, Ventana ECDM 26 mtn tandem, Ventana ECDM 29r full suspension Mtn tandem ,Ventana Fat tire tandem, Calfee Dragon Fly, Santa Cruz Carbon 5010, 907 Whiteout fat tire

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 57 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Originally Posted by oldacura View Post
Thanks colotandem.

I'm a late adopter. I really appreciate early adopters. Without them, technology wouldn't move forward.

If we do go for a Calfee, this would be a huge leap for us: To go from a 17 year old steel Co-Motion to a brand new carbon fiber Calfee is a big jump. I want to embrace the latest proven technology. This will be a very expensive bike for us but I don't want to cheap out and settle for less than optimal choices. I know that there is no best - just what compromises are best for the chooser.

Mel at Tandems East is suggesting 3x11 mechanical derailers and cable operated discs. Many here are pretty adamant about going all the way to Di2 & hydraulic brakes. Mike at Calfee is pushing toward Di2 and rim brakes. There are many strongly held opinions. I'm just trying to decide what might be best for us.

By the way - in your avatar - it looks like there is a sign above you heads. I can't read it but I assume it marks some pass or high point. Where is this?
Is this going to be a travel bike with couplers or standard frame? I think for coupled bikes that are frequently taken apart the Di2 has even more advantage as you just connect a wire and no adjustments are necessary. When we traveled with our Calfee prior to DI2 it always seemed to take a bit to dial it in every time.
akexpress is offline  
Old 07-08-15, 06:58 AM
  #64  
oldacura
Senior Member
Thread Starter
 
oldacura's Avatar
 
Join Date: Nov 2006
Location: Lafayette, Colorado
Posts: 1,042

Bikes: 1998 Co-Motion Co-Pilot, 2015 Calfee Tetra

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
No couplers. Our current bike has couplers so I think that we will forgo them on this one.

Any idea why Mel (Tandems East) is such an advocate of discs but Mike at Calfee thinks they are unnecessary? Based on what I have read from many here, the downsides to hydraulic discs are cost, weight and possibly boiling the hydraulic fluid on big descents. The upside is that they work much better in most conditions.
oldacura is offline  
Old 07-08-15, 01:13 PM
  #65  
akexpress 
Senior Member
 
Join Date: Nov 2007
Location: Anchorage, Ak
Posts: 619

Bikes: 2015 Calfee Tetra tandem,2016 Calfee Tetra Adventure Tandem, Ventana ECDM 26 mtn tandem, Ventana ECDM 29r full suspension Mtn tandem ,Ventana Fat tire tandem, Calfee Dragon Fly, Santa Cruz Carbon 5010, 907 Whiteout fat tire

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 57 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
One more upside to hydraulic disc brakes is that they are much easier on your hands as they take much less effort to pull. We were on a Cycle Oregon ride a few years ago and there was a very steep descent on a back mountain road. Steep enough that they stopped everyone at the top to check brakes. Even with decent brakes one lady's hands cramped so bad she could not stop and had a horrible crash and broke her pelvis. The Shimano brakes take only two fingers to pull with much less effort then the calipers.
akexpress is offline  
Old 07-09-15, 07:17 AM
  #66  
oldacura
Senior Member
Thread Starter
 
oldacura's Avatar
 
Join Date: Nov 2006
Location: Lafayette, Colorado
Posts: 1,042

Bikes: 1998 Co-Motion Co-Pilot, 2015 Calfee Tetra

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Based on all that I have read on this forum and all of the reasoned replies to my questions, I now think that I will spec Di2 and caliper/rim brakes. Those are my current thoughts but they have evolved and may change again.

Mel at Tandems East suggests adding a disc (rear) that is operated by the stoker if we elect to go with rim brakes. I assume this is to assist the rim brakes for big descents. If we do add a disc, I assume this would be a cable-operated disc (correct?). Likely an Avid BB7? If I do go this way I could either have the bike built with the disc and remove it if we decide it is unnecessary or alternatively have the frame & rear wheel built to take a disc and add it later if I decide that we need it. How will the rear wheel be built differently if we allow for the addition of a disc?
oldacura is offline  
Old 07-09-15, 07:27 AM
  #67  
Trsnrtr
Super Moderator
 
Trsnrtr's Avatar
 
Join Date: Jun 2002
Location: Central Illinois
Posts: 21,232

Bikes: Giant Propel, Colnago V3, Co-Motion Supremo, ICE VTX, ICE VTX WC

Mentioned: 104 Post(s)
Tagged: 1 Thread(s)
Quoted: 9260 Post(s)
Liked 2,691 Times in 1,303 Posts
The only difference will be a disc acceptable hub.
__________________

-Dennis T







Trsnrtr is offline  
Old 07-09-15, 07:51 AM
  #68  
merlinextraligh
pan y agua
 
merlinextraligh's Avatar
 
Join Date: Aug 2005
Location: Jacksonville
Posts: 30,873

Bikes: Willier Zero 7; Merlin Extralight; Calfee Dragonfly tandem, Calfee Adventure tandem; Cervelo P2; Motebecane Ti Fly 29er; Motebecanne Phantom Cross; Schwinn Paramount Track bike

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1210 Post(s)
Liked 358 Times in 184 Posts
Originally Posted by oldacura View Post
Based on all that I have read on this forum and all of the reasoned replies to my questions, I now think that I will spec Di2 and caliper/rim brakes. Those are my current thoughts but they have evolved and may change again.

Mel at Tandems East suggests adding a disc (rear) that is operated by the stoker if we elect to go with rim brakes. I assume this is to assist the rim brakes for big descents. If we do add a disc, I assume this would be a cable-operated disc (correct?). Likely an Avid BB7? If I do go this way I could either have the bike built with the disc and remove it if we decide it is unnecessary or alternatively have the frame & rear wheel built to take a disc and add it later if I decide that we need it. How will the rear wheel be built differently if we allow for the addition of a disc?
That's eesentially what we did. Caliper brakes with the ability to add a disc brake. The frame modifications are just having the mount for the Caliper added to the dropout, and a cable stop (Calfee adds an additional strut to strengthen the rear traingle.)

It can affect your choice of droput spacing. 145mm is kinda standard for tandems these days, but a number of high end tandems are being built with 130mm or 135mm spacing. If you're going to run a rear disc it pretty much rules out 130mm spacing, so you need 135mm or 145mm.

Then you just need a disc compatible hub. And install the rotor when you need it. A disc wheel needs to be more robust, but most wheels that you'd want to use on a tandem will be strong enough to put a disc on.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
merlinextraligh is offline  
Old 07-09-15, 11:11 AM
  #69  
akexpress 
Senior Member
 
Join Date: Nov 2007
Location: Anchorage, Ak
Posts: 619

Bikes: 2015 Calfee Tetra tandem,2016 Calfee Tetra Adventure Tandem, Ventana ECDM 26 mtn tandem, Ventana ECDM 29r full suspension Mtn tandem ,Ventana Fat tire tandem, Calfee Dragon Fly, Santa Cruz Carbon 5010, 907 Whiteout fat tire

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 57 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Just remember that the third brake being a disc is not a drag brake as they are not designed to dissipate that much heat if drug. It is better to do the frame for both options then to add the capability in the future. Avoid disc brake calipers with plastic parts (i.e. BB7) You might look at the new Paul"s components Klamper looks pretty nice Klamper Disc Caliper
Good luck on your new frame and build.
akexpress is offline  
Old 07-12-15, 09:23 AM
  #70  
tandemraw
Junior Member
 
Join Date: Jun 2015
Posts: 22

Bikes: Landshark 2016, Comotion CoPilot 2000

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by oldacura View Post
Tandemraw - It sounds like you have a setup similar to ours. Ours is a late 90s Co-Pilot with 54/44/32 up front & 32-11 8 speed in the rear. Ultegra derailers. We have Sram V-brakes actuated by 287V brake pulls and bar-end shifters. The rear shifts great. The front can be a bit balky but because I can trim it, I can almost always get it to shift & then run quietly. Sounds like trouble trying to get Di2 to work with a triple.
Oldacura, we do indeed have a similar setup, but our bike may be heavier because we have an Arai drum brake. (We ride a lot of hills in California, and often tour in other hilly locations) As we consider a new bike now, we're simply looking for something lighter and more dynamic. I think we're down to the choice of a newer Comotion or a Calfee. We've test-ridden the Comotion Carrera, and it feels like quite an upgrade over our current bike. Using the shop scale, a coupled Carerra, with pedals and water bottle cages, would come in around 37 lbs. A Calfee would be significantly lighter.

One observation that complicates our thoughts is what to do about gearing. From group rides, it seems that our current 3 x 9 ultegra shifting may be more reliable than the currently available 3 x 10 mechanical choices -- we never drop a chain or otherwise have balky shifting. We also have the convenience of knowing what gear we're in via the flight deck, something no longer available. So whichever bike we go for, I'm now leaning toward specing an Ultegra Di2 with K-edge extension, with 50-34 chainrings and an 11-36 cassette, or perhaps even a 11-40 cassette. From advice on these forums, it seems like the best way to do that is to get the lightning crankset, as that way you can get the 110 bcd on the drive side for the compact front, and the 130 bcd for the Gates timing belt.

Because we tour a lot, we very much value reliability. Every time we unpack the bike in some remote location, we simply need it to work without undue fuss. I have high confidence in a new Comotion to do that, but I am also attracted to the lower weight of a coupled Calfee, and I hope that a Calfee would be equally reliable for travel. Our packed Comotion is inspected every time by TSA, and we've had damage caused by them twice -- once a bent rim and another time a bent rear derailleur. I wonder if carbon bikes get inspected as frequently as steel bikes by TSA. If so, could they cause worse damage to carbon fiber?

We're close enough to Calfee that I'm arranging a test ride in a couple of weeks.

What choices are you leaning toward?

Fyi ... we're a 300 lb team with average strength.
tandemraw is offline  
Old 07-13-15, 08:21 AM
  #71  
oldacura
Senior Member
Thread Starter
 
oldacura's Avatar
 
Join Date: Nov 2006
Location: Lafayette, Colorado
Posts: 1,042

Bikes: 1998 Co-Motion Co-Pilot, 2015 Calfee Tetra

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
Right now I'm thinking Di2 50-34 & 11-36. Ultegra rim brakes and maybe provisions for a rear disc.
oldacura is offline  
Old 07-15-15, 10:50 AM
  #72  
tandemraw
Junior Member
 
Join Date: Jun 2015
Posts: 22

Bikes: Landshark 2016, Comotion CoPilot 2000

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by oldacura View Post
Right now I'm thinking Di2 50-34 & 11-36. Ultegra rim brakes and maybe provisions for a rear disc.
Have you picked out a frame yet? We're trying to make the choice now -- it's hard to find appropriate bikes to try, so I thought it would be worth comparing notes.

We did test ride a Comotion Carrera a few months ago. It was a stock configuration, not coupled. We only rode it 10 miles or so, but it seemed to be much more fun and responsive than our current Copilot (with original 48 spoke wheels, Arai drum brake, etc).


We're hoping to arrange a test ride on a Calfee shortly.
tandemraw is offline  
Old 07-15-15, 11:43 AM
  #73  
oldacura
Senior Member
Thread Starter
 
oldacura's Avatar
 
Join Date: Nov 2006
Location: Lafayette, Colorado
Posts: 1,042

Bikes: 1998 Co-Motion Co-Pilot, 2015 Calfee Tetra

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 173 Post(s)
Likes: 0
Liked 6 Times in 5 Posts
We're probably going to order a Calfee carbon sight-unseen (unridden). We can't easily find one to try but everyone who has one raves about it.
oldacura is offline  
Old 07-15-15, 12:56 PM
  #74  
jnbrown
Senior Member
 
jnbrown's Avatar
 
Join Date: Nov 2006
Location: Encinitas, CA
Posts: 1,226
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 108 Post(s)
Liked 62 Times in 32 Posts
Originally Posted by oldacura View Post
We're probably going to order a Calfee carbon sight-unseen (unridden). We can't easily find one to try but everyone who has one raves about it.
That was my situation before we bought ours. It was a leap of faith and talking to other people.
It easily exceeded my expectations and is one the best investments I have made despite the large amount of $$$.
It is our third and likely last tandem, I don't see how it can be improved upon.
jnbrown is offline  
Old 07-15-15, 06:55 PM
  #75  
2frmMI
Member
 
Join Date: Aug 2009
Location: Mid Michigan
Posts: 345

Bikes: Erickson Signature, Paketa D2R

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Liked 0 Times in 0 Posts
Despite the preponderance of love toward Calfee on this board, we opted for Paketa. Loving it. Climbing powerhouse. Do your homework...
2frmMI is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.