Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-27-12, 07:50 PM   #1
VastCrew
Senior Member
Thread Starter
 
Join Date: Jul 2012
Bikes:
Posts: 149
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Computer for Tandem?

Looking for a computer to put on our tandem. I would like a computer that displays your current gear. I was looking at Shimano Flight Deck but it does not look like the current model offers the gear display. Would also like GPS, cadence and speed display. Hopefully wireless...

Is anything currently offered that offers the above.
VastCrew is offline   Reply With Quote
Old 08-27-12, 10:10 PM   #2
veggie
certified vegetarian
 
veggie's Avatar
 
Join Date: Aug 2008
Location: Houston, Texas
Bikes:
Posts: 356
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Garmin has everything but the current gear. I have a flightdeck on my tandem and don't really ever look at the current gear.
veggie is offline   Reply With Quote
Old 08-27-12, 10:19 PM   #3
droopayne
Member
 
droopayne's Avatar
 
Join Date: Aug 2012
Location: Moab, UT
Bikes: RIP Niner, Salsa, Co-Motion Trident
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i'm sorry for the hijack, but how does the current gear thingy work on the flightdeck? where does it pick up that info? i have ultegra flight deck levers and would love to have a gear indicator. i have always thought the old analog indicators were useless but on our triple there are times when i'd like to know what gear i'm in but can't look down to figure it out.

sorry to the OP as i have no helpful info, i've always thought the GPS computers were way overpriced. i like to track rides with GPS, but i just throw a handheld in my handlebar bag or backpack. they're more accurate and have way more battery life...and you can get them cheap.
droopayne is offline   Reply With Quote
Old 08-27-12, 10:30 PM   #4
veggie
certified vegetarian
 
veggie's Avatar
 
Join Date: Aug 2008
Location: Houston, Texas
Bikes:
Posts: 356
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by droopayne View Post
i'm sorry for the hijack, but how does the current gear thingy work on the flightdeck? where does it pick up that info? i have ultegra flight deck levers and would love to have a gear indicator. i have always thought the old analog indicators were useless but on our triple there are times when i'd like to know what gear i'm in but can't look down to figure it out.
It gets the info from the shifters themselves. The shifters do more than act as buttons for the computer, they tell it what gear you are in.
veggie is offline   Reply With Quote
Old 08-27-12, 10:43 PM   #5
droopayne
Member
 
droopayne's Avatar
 
Join Date: Aug 2012
Location: Moab, UT
Bikes: RIP Niner, Salsa, Co-Motion Trident
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
awesome i so want that! it's hard to get gearing info when you're on a triple and your rear stoker is 8yo and too busy singing made up songs to the tune of Jingle Bells.
droopayne is offline   Reply With Quote
Old 08-27-12, 11:07 PM   #6
veggie
certified vegetarian
 
veggie's Avatar
 
Join Date: Aug 2008
Location: Houston, Texas
Bikes:
Posts: 356
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
veggie is offline   Reply With Quote
Old 08-28-12, 08:12 AM   #7
mwandaw
Half Fast
 
mwandaw's Avatar
 
Join Date: Sep 2010
Location: Southern California
Bikes: A road bike and a tandem road bike
Posts: 658
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
It may be hard to find the Flight Deck gear that you want. However, earlier this year Tandem Tom (and some others) posted pictures and accounts on how they added inline gear indicators to their bikes.

The conversation went a little off topic in places, so you'll have to scroll down a ways to see the results.

droopayne: If you can sing along with your daughter, you're probably in the right gear

Last edited by mwandaw; 08-28-12 at 11:48 AM.
mwandaw is offline   Reply With Quote
Old 08-28-12, 08:32 AM   #8
waynesulak
Senior Member
 
waynesulak's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, TX
Bikes: 650B tandem converted from Santana Arriva, Santana Noventa, Boulder Bicycle 700C, Gunnar Sport, Trek TX700,
Posts: 1,913
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by droopayne View Post
awesome i so want that! it's hard to get gearing info when you're on a triple and your rear stoker is 8yo and too busy singing made up songs to the tune of Jingle Bells.
When we started tandem riding I tried to count the gears in back and always know where we were without looking. This worked ok but now I just remember the front ring location and shift the rear as needed to maintain our desired cadence range.

I learned the speed ranges of each front ring. For example our middle ring will normally cover from 10-21 mph using the entire (12-25) cassette. I consider the current speed and front ring being used and then decide if a front ring change is needed for the upcoming terrain. Then as we move forward just shift the back as needed keeping an eye on the speed. When we get up to to 18-20 mph I start thinking about the big ring.

Last edited by waynesulak; 08-28-12 at 08:36 AM.
waynesulak is offline   Reply With Quote
Old 08-28-12, 12:34 PM   #9
VastCrew
Senior Member
Thread Starter
 
Join Date: Jul 2012
Bikes:
Posts: 149
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the resonses and the hijack was good as well because I didn't know how the setup worked either!

I didn't realize it was such a limited selection of computers available that offered gear indication! At this point the indicator would be very helpful not only because we are new to tandeming but also because this is a different setup than our single bikes as well as more gearing since we now have a triple in the front. Tonight will only be our third ride so hopefully the more we ride the less we screw up the shifting. We have quite a few never-ending inclines around here so I'm hoping we improve quickly, messing up near the bottom of an uphill mile = struggle! It also seems that we are shifting frequently. More frequently than the single when riding the same route for sure!

Thanks for the Gear Indicator link Mwandaw, very helpful!

The best news of all is that we have had the tandem in our possesion for 5 days now, and LOVE it. That is without a computer so it will only get better from here!!
VastCrew is offline   Reply With Quote
Old 08-28-12, 12:56 PM   #10
droopayne
Member
 
droopayne's Avatar
 
Join Date: Aug 2012
Location: Moab, UT
Bikes: RIP Niner, Salsa, Co-Motion Trident
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
cool, i was starting to feel guilty about hijack. i like the low tech option, if my shifter cables didn't run the underside of my downtube i would go super low teck and just mark the frame with dots and attach something to the cable. since i just bought a computer for the tandem i am tempted to go with the analog version...but then my mountain bike could use a computer...soooo maybe i could go high tech

as for the OP, have fun with your tandem!
droopayne is offline   Reply With Quote
Old 08-28-12, 12:58 PM   #11
Bent In El Paso
Senior Member
 
Bent In El Paso's Avatar
 
Join Date: Nov 2009
Location: El Paso, TX
Bikes: Co-Motion Speedster Co-Pilot
Posts: 187
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
While deciding what kind of computer to put on your bike, you may also want to consider how many.

When I decided on the type of computer to put on our bike, unbeknownst to my stoker, I ordered two. While she insisted she did not want a computer on the back, I think she just didn't want to spend the $$. Now that she has it, she loves it. She likes being able to monitor speed, incline, elevation, cadence, temperature, etc... on her own. It makes her feel less of being a sightseer and more involved in monitoring our performance on the bike.
Bent In El Paso is offline   Reply With Quote
Old 08-28-12, 01:13 PM   #12
droopayne
Member
 
droopayne's Avatar
 
Join Date: Aug 2012
Location: Moab, UT
Bikes: RIP Niner, Salsa, Co-Motion Trident
Posts: 43
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i was going to hijack further to ask about a stoker speedo, but opted not too. now that fred has brought it up tho

fred is your stoker speedo wired? we want a stoker speedo as well, but not sure the wireless will make it that far and around my arse. mounting a rear wheel sensor doesn't really help in our case either since the bike is a triple. i want to add one, but not fond of the wired option.

i am going to try it with the one i bought but curious what others have set up.
droopayne is offline   Reply With Quote
Old 08-28-12, 01:24 PM   #13
Bent In El Paso
Senior Member
 
Bent In El Paso's Avatar
 
Join Date: Nov 2009
Location: El Paso, TX
Bikes: Co-Motion Speedster Co-Pilot
Posts: 187
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by droopayne View Post
i was going to hijack further to ask about a stoker speedo, but opted not too. now that fred has brought it up tho

fred is your stoker speedo wired? we want a stoker speedo as well, but not sure the wireless will make it that far and around my arse. mounting a rear wheel sensor doesn't really help in our case either since the bike is a triple. i want to add one, but not fond of the wired option.
We are currently using the Garmin Edge 500 for both the captain and stoker. These are both paired up with one wheel and cadence sensor. Since they are ANT devices, the distance from the rear chainstay to the computers is not a problem. Before the Garmins, we were using VDO computers linked to one speed sensor on the front fork without any issues.

In general, distance from the sensor to the computer(s) is less of a factor when the sensor transmits a digital signal.
Bent In El Paso is offline   Reply With Quote
Old 08-28-12, 02:01 PM   #14
Ritterview
Tandem Vincitur
 
Ritterview's Avatar
 
Join Date: Sep 2005
Location: Northern California
Bikes: BMC Pro Machine SLC01, Specialized Globe, Burley Rock 'N Roll tandem, Calfee Dragonfly tandem.
Posts: 3,317
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by veggie View Post
Garmin has everything but the current gear. I have a flightdeck on my tandem and don't really ever look at the current gear.
The info a Garmin provides has proven more useful for more cyclists than what cassette cog you are in, thus there hasn't been further development of gear indicators. This is especially true of power, which has had a big influence, and makes the current gear seem trivial.

Also, electronic shifting has built in means of knowing current gear, and displays might be more likely in the future for Di2 or EPS than for mechanical gears.

The OP might want to check out what is going to be in the Garmin Edge 900, the release of which can be gauged by what is presented at Eurobike and Interbike.

According to this preview, the 900 will have features such as Bluetooth, which will make uploads easier (This preview looks a little suspect, however).
Ritterview is offline   Reply With Quote
Old 08-28-12, 02:34 PM   #15
waynesulak
Senior Member
 
waynesulak's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, TX
Bikes: 650B tandem converted from Santana Arriva, Santana Noventa, Boulder Bicycle 700C, Gunnar Sport, Trek TX700,
Posts: 1,913
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by Ritterview View Post
The info a Garmin provides has proven more useful for more cyclists than what cassette cog you are in, thus there hasn't been further development of gear indicators. This is especially true of power, which has had a big influence, and makes the current gear seem trivial. ......

Power display is great if there was a good way to measure the power (not everyone wants to use LOOK style pedals).
waynesulak is offline   Reply With Quote
Old 08-28-12, 04:02 PM   #16
diabloridr
Senior Member
 
diabloridr's Avatar
 
Join Date: Dec 2010
Location: Central Coast, California, USA
Bikes: Co-Motion Speedster, Calfee Dragonfly, Ancient Sun Fixie, Trek 5900, Trek 9800
Posts: 323
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
We use a Garmin 500, which will do everything except the gear display.

I handle that task with a simple Shimano in-line gear indicator (less than $10 IIRC). I only run the indicator for the rear cassette, I rarely get sufficiently brain-dead to forget which chainring we're in.
diabloridr is offline   Reply With Quote
Old 08-28-12, 09:37 PM   #17
Sprout97 
Senior Member
 
Join Date: Apr 2012
Location: Orange Park, FL
Bikes: 2004 Co-Motion Speedster
Posts: 168
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I'm running a Flight Deck up front, and my wife has a Cateye Double Wireless. To add to what others have pointed out, the FD computes inferred speed and cadence, based on the front wheel rpm, chain ring-, and cassette selections. The Flight Deck computer with a gear display are limited to the Shimano 6500- and 6600 brifters. While I can't comment to what Ritterview says with regard to the Garmin, one can always map out gear-inch and apply it to what Wayne stated about speed ranges. For me, my upstairs processor doesn't compute that fast. In addition to the Shimano Flight Deck, IIRC Campy had their Ergobrain (I don't think it's still in production).
__________________
Jeff

Learn from other people's mistakes. You won't live long enough to make them all yourself.

2004 Co-Motion Speedster
2010 (Specialized) Carmel comfort (my neighborhood bike)
2008 Raleigh comfort (wife's neighborhood bike)
Sprout97 is offline   Reply With Quote
Old 08-29-12, 07:41 AM   #18
WheelsNT
Senior Member
 
Join Date: Nov 2011
Bikes:
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Bent In El Paso View Post
While deciding what kind of computer to put on your bike, you may also want to consider how many.
This.

By far the most common trouble spot for folks new to tandems is disagreement about what the cadence should be. If you put a computer *with cadence* at both positions, then captain and stoker can have an informed discussion about cadence. Without computers, you're both guessing, particularly if one or both of you are inexperienced cyclists that haven't ridden enough to have a sense of what cadence is.

Another benefit is that once you agree about what the cadence should be, the stoker will see on the computer that you are keeping the cadence in the agreed-upon range. This addresses the issue where when your legs are tired, the same numerical cadence feels faster than it did when your legs were fresh.
WheelsNT is offline   Reply With Quote
Old 08-29-12, 09:47 AM   #19
waynesulak
Senior Member
 
waynesulak's Avatar
 
Join Date: Jan 2008
Location: Ft Worth, TX
Bikes: 650B tandem converted from Santana Arriva, Santana Noventa, Boulder Bicycle 700C, Gunnar Sport, Trek TX700,
Posts: 1,913
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by WheelsNT View Post
This.

By far the most common trouble spot for folks new to tandems is disagreement about what the cadence should be. If you put a computer *with cadence* at both positions, then captain and stoker can have an informed discussion about cadence. Without computers, you're both guessing, particularly if one or both of you are inexperienced cyclists that haven't ridden enough to have a sense of what cadence is.

Another benefit is that once you agree about what the cadence should be, the stoker will see on the computer that you are keeping the cadence in the agreed-upon range. This addresses the issue where when your legs are tired, the same numerical cadence feels faster than it did when your legs were fresh.
That is a good point. When we began riding the tandem my stoker liked to monitor our cadence to insure that I was staying in the agreed upon range. With all the work involved in constantly shifting I liked the idea that she can see the result. Now she rarely displays the cadence as she has confidence in my gear choices.

It has also helped that we got her bike fit, crank length, and flexibility to a point where we more easily agree on cadence.
waynesulak is offline   Reply With Quote
Old 08-31-12, 10:02 AM   #20
twocicle
Clipless in Coeur d'Alene
 
twocicle's Avatar
 
Join Date: Mar 2012
Location: Coeur d'Alene, Idaho
Bikes: Calfee Dragonfly S&S Tandem, Specialized Tarmac SL4 S-Works, other misc Road & MTB singles
Posts: 1,626
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
We are one of the teams using a Shimano in-line gear indicator. It is simple to install, but from my experience (mostly from my single bike) it is best to securely support the cable at both ends of the indicator, as these plastic devices will crack when stressed sideways.

see this pic of my install for the basic idea :


As for computers, we are running dual Edge 800s with one speed/cad sensor on the rear non-drive chainstay. The Ant+ range has a huge distance ability, so signal pickup is never a problem.

For mounting the 800s, we use the following from FSA (http://www.amazon.com/gp/product/B00...ls_o04_s00_i00) which I feel provide the best universal solution (stable and strong with dual clamps). I have it on the front bars to extend the visibilty further forward, rather than looking down to see it (not so much an issue on my single), though I installed it upside down in order to not interfer with cable routing on the bars. The mount gives great rear facing handlebar-mount orientation flexibility for setup of the Edge 800 in the stoker area.



It is such a strong mount, that I have no concern of breaking it and it adds some protection for the Garmin too.

Final looks like this...

Attached Images
File Type: jpg P1010481 (Large).JPG (90.8 KB, 32 views)
File Type: jpg 41Rl9VVdiML__SS500_.jpg (19.7 KB, 18 views)
File Type: jpg P1010756 (Large).jpg (100.3 KB, 24 views)
File Type: jpg P1010754 (Large).jpg (100.1 KB, 24 views)
File Type: jpg P1010755 (Large).jpg (95.5 KB, 23 views)
File Type: jpg P1010753 (Large).jpg (98.6 KB, 21 views)

Last edited by twocicle; 09-02-12 at 12:00 AM.
twocicle is offline   Reply With Quote
Old 09-06-12, 06:47 PM   #21
Ritterview
Tandem Vincitur
 
Ritterview's Avatar
 
Join Date: Sep 2005
Location: Northern California
Bikes: BMC Pro Machine SLC01, Specialized Globe, Burley Rock 'N Roll tandem, Calfee Dragonfly tandem.
Posts: 3,317
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by twocicle View Post

For mounting the 800s, we use the following from FSA...
Garmin is at last making a computer mount specific for the 500 and 800. This looks better (and cheaper) than the Bar Fly, as the arm is mounted under rather than over the bar, and the Garmin will be level with the stem instead of elevated above the stem. It probably has a more definite engagement, whereas the Bar Fly is mushy.

Out-front Bike Mount

Quote:
Originally Posted by Wiggle
This handy bike handlebar mount allows you to place either your Garmin Edge 200, 500 or 800 infront of your bars. This puts the Edge in a position optimised for easier viewing and increased safety.
  • Puts the Edge in a position optimized for easier viewing and increased safety
  • Mount material: Plastic
  • Dimensions 113mm x 52mm x 39mm
  • Weight: 26g
  • Compatible devices: Edge 200, 500, 800, Forerunner 310XT, 910XT (with Quick Release Kit)


__________________

Strava Tandem Club
Ritterview is offline   Reply With Quote
Old 09-06-12, 08:24 PM   #22
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: In Central IN
Bikes: RANS V3, RANS V-Rex, RANS Screamer
Posts: 13,292
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Typical for recumbent bikes, our Screamer has twist shifters with gear indicators. Not recommending this for those not interested in flat bars or twisters.
My two single 'bents have trigger shifters - one with and one without indicators. On the one without, it would be nice to always be sure exactly which cog the chain is on.
__________________
RANS V3 - Ti, RANS V-Rex - cromo, RANS Screamer - cromo
JanMM is offline   Reply With Quote
Old 09-06-12, 11:16 PM   #23
twocicle
Clipless in Coeur d'Alene
 
twocicle's Avatar
 
Join Date: Mar 2012
Location: Coeur d'Alene, Idaho
Bikes: Calfee Dragonfly S&S Tandem, Specialized Tarmac SL4 S-Works, other misc Road & MTB singles
Posts: 1,626
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Quote:
Originally Posted by Ritterview View Post
Garmin is at last making a computer mount specific for the 500 and 800. This looks better (and cheaper) than the Bar Fly, as the arm is mounted under rather than over the bar, and the Garmin will be level with the stem instead of elevated above the stem. It probably has a more definite engagement, whereas the Bar Fly is mushy.

Out-front Bike Mount
I do like that both the Bar Fly and the new Garmin mount eliminate the default rubber band mount.

However, the biggest problems I have with both mounts are:
1) the lack of adjustment for changing the view angle of the Edge while riding (ambient light changes sometimes require the display to be re-angled to see it).
2) how they limit the mount height (especially for the stoker position).
3) while it looks cools, the under bar design interfers with cable routing. I resolved this issue by flipping the FSA units upside down on all my front bars (see photos above in post #20). The FSA mount has the same type of offset mount, but using it in the normal orientation places the extension right where all cables exit from under the bar tape.
4) that the single arm mounts tend to vibrate with the bigger Edge units - makes reading the display more difficult.

Last edited by twocicle; 09-06-12 at 11:20 PM.
twocicle is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 09:56 AM.