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Search: Posts Made By: oldacura
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11-17-22, 07:47 AM
Replies: 21
Views: 1,445
Posted By oldacura

What would rotating between 3 chains accomplish?

What would rotating between 3 chains accomplish?
11-16-22, 10:26 AM
Replies: 21
Views: 1,445
Posted By oldacura

1250 miles on a chain sounds crazy low to me as...

1250 miles on a chain sounds crazy low to me as well but 1/16" / 12" is definitely a lot of stretch (wear) as well. However, our team weight is more like 300#.

I have used Blackspire chainrings...
11-10-22, 12:07 PM
Replies: 9
Views: 925
Posted By oldacura

Here is a link to the Dia-Compe 287V brake levers...

Here is a link to the Dia-Compe 287V brake levers on eBay:
...
11-08-22, 03:42 PM
Replies: 9
Views: 925
Posted By oldacura

We have about a 25 year old CoMotion with...

We have about a 25 year old CoMotion with V-brakes (direct pull). It is set up with bar end shifters and Dia-Comp 287V brake levers. These are available new on eBay. The right (rear) shifter was...
07-19-22, 02:37 PM
Replies: 6
Views: 1,163
Posted By oldacura

We have an older Co-Pilot with rim brakes. We...

We have an older Co-Pilot with rim brakes. We have about 13k miles on it. The brakes work great. I've never wished for disk brakes.

Packing and unpacking a coupled tandem is a big project. It is...
03-07-22, 10:32 AM
Replies: 8
Views: 1,684
Posted By oldacura

Ok - thanks for the link!

Ok - thanks for the link!
03-07-22, 09:49 AM
Replies: 8
Views: 1,684
Posted By oldacura

Used tandem sale

We're considering selling an old tandem. There used to be a website: Tandem Magazine that had a For Sale / Wanted to Buy section. It either no longer exists or probably isn't the best market.

I...
01-17-22, 09:31 AM
Replies: 9
Views: 2,685
Posted By oldacura

The one (unlikely) instance where I see that this...

The one (unlikely) instance where I see that this could be a problem is:

You're approaching an intersection. The light turns yellow. You as captain decide to power up to get through before the...
01-12-22, 03:25 PM
Replies: 9
Views: 2,685
Posted By oldacura

I can think of 2 things that might make this...

I can think of 2 things that might make this difficult:

1) Steering, braking and shifting need to be coordinated with each other. Adding the communication from the captain to the stoker could...
07-16-21, 12:45 PM
Replies: 37
Views: 9,513
Posted By oldacura

We probably only have 3000 miles on our bike but...

We probably only have 3000 miles on our bike but I have never done anything with the belt. We also have a pair of Faraday Porteur E-Bikes that have Shimano Alfine rear hubs and a Gates Carbon belt...
07-16-21, 10:56 AM
Replies: 37
Views: 9,513
Posted By oldacura

Reburns - are you using the Gates Carbon Drive...

Reburns - are you using the Gates Carbon Drive app on your smartphone? I'll have to try it. 40 hz seems a bit high but I probably tend to shoot for the lower end of the range to reduce stress on the...
07-15-21, 10:57 AM
Replies: 37
Views: 9,513
Posted By oldacura

His pulleys do look like Centertrack to me (I...

His pulleys do look like Centertrack to me (I could be mistaken).

On our old bike we had a similar effect with the timing chain. I recall that rotating the rings with respect to each other helped...
12-14-20, 12:07 PM
Replies: 32
Views: 5,728
Posted By oldacura

So - at the risk of exposing my ignorance here: ...

So - at the risk of exposing my ignorance here:

The default assignment for the left (front) Di2 shifter is OPPOSITE that of Shimano STI front shifters?

If someone had never used STI, this...
12-12-20, 10:58 AM
Replies: 32
Views: 5,728
Posted By oldacura

https://cimg0.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg0.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1504/img_1011_67137ac85b11f343ab40287868578add998d4ccb.jpg
Your Calfee paint job looks quite similar to my snowboard. It turned out a bit...
12-10-20, 03:42 PM
Replies: 32
Views: 5,728
Posted By oldacura

I have been through the E Tube software many...

I have been through the E Tube software many times on a Windows laptop. I haven't touched it for years and I'd probably have to re-learn it all over again. I was amazed how user-unfriendly the...
12-10-20, 10:14 AM
Replies: 32
Views: 5,728
Posted By oldacura

I had no idea that additional switches were...

I had no idea that additional switches were there. Not sure how I would program them, I considered re-assigning the levers but then it would operate differently from my single bike with STI shifters.
12-09-20, 02:41 PM
Replies: 32
Views: 5,728
Posted By oldacura

When we first went to Di2 I found that I would...

When we first went to Di2 I found that I would often shift up instead of down or down instead of up - especially on the rear. I've ridden many different types of mechanical shift systems (downtube...
12-09-20, 09:55 AM
Replies: 32
Views: 5,728
Posted By oldacura

Our old bike was a 3x8 with barcon shifters and...

Our old bike was a 3x8 with barcon shifters and rim brakes. We had a 24x32 low end and a 54x11 top end. Sometimes we really needed that low end and when we had the opportunity to close in on a much...
12-08-20, 09:50 AM
Replies: 32
Views: 5,728
Posted By oldacura

Looks like you went with a similar set-up as we...

Looks like you went with a similar set-up as we did: Ultegra Di2 with rim brakes. Many have questioned why we didn't go with disc brakes. At the time I concluded that they were more expensive and...
11-11-20, 11:18 AM
Replies: 7
Views: 2,311
Posted By oldacura

Pretty cool! What color are you going to paint...

Pretty cool! What color are you going to paint it? Will you be able to find original decals? I assume riding in SF requires low gears, strong legs or both!
11-02-20, 08:56 AM
Replies: 20
Views: 4,107
Posted By oldacura

Paul - I'm sorry you felt the need to...

Paul -

I'm sorry you felt the need to delete your post. I read all of it and enjoyed another perspective on a Calfee.

I find that most people on this forum are considerate. There are...
10-29-20, 10:50 AM
Replies: 25
Views: 3,600
Posted By oldacura

Doesn't using such a small (small) chainring...

Doesn't using such a small (small) chainring prevent you from using a larger big ring (like 50t - 52t)? Our top gear is 52tx11t and we spin out much above 40mph.
10-29-20, 09:54 AM
Replies: 20
Views: 4,107
Posted By oldacura

We too bought a new Calfee Tetra in late 2015...

We too bought a new Calfee Tetra in late 2015 after 15 years on a used Co-Motion Co-Pilot. We haven't (and won't) put nearly as many miles on the new bike as we did on the old because we're not new...
10-05-20, 02:56 PM
Replies: 54
Views: 9,429
Posted By oldacura

So your final conclusion is that this was caused...

So your final conclusion is that this was caused by the chain climbing off the top of the small chainring (at 12 o'clock)? Wouldn't all of the chain links (from 12 o'clock to 6 o'clock) have to...
09-15-20, 06:37 AM
Replies: 16
Views: 2,763
Posted By oldacura

We have exceeded the recommended maximum...

We have exceeded the recommended maximum chainring size difference from Shimano for our Ultegra Di2 setup. The recommended maximum difference is 16 teeth. We are at 18 teeth (52 - 34). The shift...
09-14-20, 08:10 AM
Replies: 16
Views: 2,763
Posted By oldacura

Just be sure I understand: Your XTR front...

Just be sure I understand: Your XTR front derailleur will handle your 52/39/30 chainrings? I had been told (some time ago) that the maximum chainring for XTR was 46t.
09-10-20, 12:35 PM
Replies: 54
Views: 9,429
Posted By oldacura

The torque placed on the stokers bottom bracket...

The torque placed on the stokers bottom bracket by the timing belt (basically the force you are applying to your pedals) will attempt to twist the stoker's bottom bracket clockwise (when viewed from...
09-10-20, 07:29 AM
Replies: 54
Views: 9,429
Posted By oldacura

You said above that you reach 2 mph when climbing...

You said above that you reach 2 mph when climbing - and you do this with both in the saddles. This is hard to comprehend. We don't do steep climbs much anymore but the last time we were on a very...
09-09-20, 07:22 AM
Replies: 54
Views: 9,429
Posted By oldacura

Also - I re-read your initial post. You might...

Also - I re-read your initial post. You might contact Co-Motion about this issue. I have found that they are very knowledgeable and helpful in regard to such issues.
09-09-20, 07:07 AM
Replies: 54
Views: 9,429
Posted By oldacura

If your team is 400 pounds and you are muscling...

If your team is 400 pounds and you are muscling up a steep hill a 2 mph, you are putting a huge amount of torque on your frame.



Assume you are putting the same amount of force on your pedals...
09-08-20, 01:42 PM
Replies: 54
Views: 9,429
Posted By oldacura

I think I agree with OneIsAllYouNeed: "ghost...

I think I agree with OneIsAllYouNeed: "ghost shifting" is often caused by frame flex. If you are a heavy, strong team, the tension in the top span of your drive chain may be causing the rear triangle...
09-08-20, 11:33 AM
Replies: 16
Views: 2,763
Posted By oldacura

There have been lots of discussions about this. I...

There have been lots of discussions about this. I was in the same boat several years ago when we got a new tandem. Most everyone that had Di2 loved it. I wanted the electronic shifting but wanted the...
08-10-20, 10:28 AM
Replies: 22
Views: 2,962
Posted By oldacura

My Stoker too hates the "She's not pedaling"...

My Stoker too hates the "She's not pedaling" comment. I try to tell her that people saying that really aren't being critical - they just think they are being really clever (?). Anyway, she hates the...
08-10-20, 10:25 AM
Replies: 14
Views: 2,117
Posted By oldacura

May not be related but I have used SRAM chains on...

May not be related but I have used SRAM chains on most of our bikes. I like the quick link better than the Shimano solution. On my mountain bike (10 speed I think) I've had an issue recently that...
07-30-20, 07:32 AM
Replies: 3
Views: 1,045
Posted By oldacura

Sounds like you have a lot of racer types like we...

Sounds like you have a lot of racer types like we do here in Boulder County. They seem to be so caught up in their activity that they can't be bothered to acknowledge people so uncool to ride a...
07-27-20, 03:12 PM
Replies: 3
Views: 1,045
Posted By oldacura

Current cycling demographics

We took our tandem out yesterday for a ride we have done many times in the past. As we neared home, I asked my stoker "what did you notice about the other riders we encountered today?".

She said...
03-11-20, 10:54 AM
Replies: 35
Views: 4,466
Posted By oldacura

I'm certain that the advice to strengthen your...

I'm certain that the advice to strengthen your core is good advice. I should heed this (but I don't).

Trying to get bikes to fit me better recently I have ordered a series of stems of varying...
02-24-20, 07:22 AM
Replies: 13
Views: 2,972
Posted By oldacura

We have an older Co-Motion Co-Pilot. If you...

We have an older Co-Motion Co-Pilot.

If you take the front "half" off of your bike, you still have to disconnect 3x cables. The cable splitters work OK but I wouldn't want to do this regularly.
...
12-02-19, 04:10 PM
Replies: 20
Views: 5,869
Posted By oldacura

We have double-legged kickstands on our single...

We have double-legged kickstands on our single E-Bikes (weight is not really an issue). Don't know the brand. They work great.
10-25-19, 06:47 AM
Replies: 13
Views: 3,901
Posted By oldacura

I would agree. If the chain doesn't interfere...

I would agree. If the chain doesn't interfere with something, inboard mounting would reduce twisting on the BB.
10-11-19, 09:14 AM
Replies: 26
Views: 6,370
Posted By oldacura

Agree with your observations about riding...

Agree with your observations about riding side-by-side. We rarely do it except in ideal conditions. If I am on the inside, I'm always checking behind me for overtaking traffic and/or using a mirror...
10-10-19, 07:09 AM
Replies: 26
Views: 6,370
Posted By oldacura

My original posting was pointing out that...

My original posting was pointing out that electric single bikes were a different solution to a problem that tandems solve: To allow riders of different abilities to ride together. We have a human...
10-08-19, 02:50 PM
Replies: 26
Views: 6,370
Posted By oldacura

We too just returned from Hawaii (Kauai). We did...

We too just returned from Hawaii (Kauai). We did see a few riders on the main road around the island but I think these people are crazy. The roads are narrow with little or no shoulders and many...
09-20-19, 08:29 AM
Replies: 32
Views: 13,748
Posted By oldacura

We have a 2015 Calfee with Ultegra Di2. I wanted...

We have a 2015 Calfee with Ultegra Di2. I wanted the biggest range possible. We're running 52t x 34t up front with 11t x 40t in the rear. We have a K-Edge long cage on the rear derailleur. This is...
09-16-19, 09:44 AM
Replies: 26
Views: 6,716
Posted By oldacura

If your tandem is carbon fiber, don't clamp any...

If your tandem is carbon fiber, don't clamp any of the frame tubes. Clamp one of the seat posts. If your tandem is metal, it should be OK to clamp the frame. I would think it is best to clamp near...
09-11-19, 11:24 AM
Replies: 26
Views: 6,370
Posted By oldacura

Not been to the Big Island. We're staying on the...

Not been to the Big Island. We're staying on the north shore in Kauai. On the east shore is the town of Kapaa. In Kapaa is Kauai Cycles. They rent bikes. I think they have a non-motorized...
09-11-19, 07:08 AM
Replies: 26
Views: 6,370
Posted By oldacura

What island(s) are you going to? Sixteen...

What island(s) are you going to?

Sixteen years ago we went to Maui with our coupled tandem and rode up (and down) Haleakala. Our team age at the time was 92. It was the hardest ride we have ever...
09-09-19, 07:16 AM
Replies: 26
Views: 6,370
Posted By oldacura

Electric bikes

My wife (Stoker) and I have been riding various types of bikes for a long time: single road bikes, single mountain bikes, road tandems, etc.

Our team age is now 120+ and we decided to try...
08-28-19, 09:20 AM
Replies: 32
Views: 13,748
Posted By oldacura

Ours was not a conversion but a new build Calfee...

Ours was not a conversion but a new build Calfee Di2. I wanted the widest range we could get out of a 2x system. We're at 52t x 34t up front with a 40t x 11t cassette. It was set up with a K-Edge...
08-27-19, 08:45 AM
Replies: 32
Views: 13,748
Posted By oldacura

Where did you get the chainring guard?

Where did you get the chainring guard?
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