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Search: Posts Made By: Carbonfiberboy
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05-15-22, 11:28 AM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

Or maybe not:...

Or maybe not: https://www.bikefitadviser.com/blog/oval-chainrings
Also:
https://www.youtube.com/watch?v=jtJ7eIyqQ0E
05-13-22, 10:13 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

I agree with jonathanf2 up there. My wife has...

I agree with jonathanf2 up there. My wife has 151mm cranks on our tandem and 165mm on her trainer bike. She doesn't really notice the difference and she's 73. My proper size cranks would be 165, but...
05-13-22, 11:28 AM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

Most of that is just training effect. You get...

Most of that is just training effect. You get better at what you do. It's hard to tell what's going on when one switches back and forth. The best is simply to get one's numbers, i.e. crank/leg...
05-12-22, 12:23 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

This section of the thread is quite odd. One...

This section of the thread is quite odd. One should have realized that the "burn" is caused by one's muscles consuming carbohydrates at an increased rate: the tech is here:...
11-03-21, 07:29 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

Good points. But why move back with shorter...

Good points. But why move back with shorter cranks? When my stoker went from 170 to 151mm cranks, I tried doing a KOPS but her power dropped off. I moved her saddle back to where it was and that...
10-16-21, 07:32 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

IME you are absolutely correct. Future: I didn't...

IME you are absolutely correct. Future: I didn't hit a steep drop-off until 63, another at ~70. But one just has to never quit, never give up. I haven't done a 400k since my mid-60s, but my wife and...
10-16-21, 12:14 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

I think there are so many opinions on best crank...

I think there are so many opinions on best crank length because . . . everyone's different, sorta like saddles. IOW experiment, realizing that changing any aspect of fit requires a period of...
10-16-21, 12:34 AM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

I'm 5'6" and ride 170 on my road bike, 175 on our...

I'm 5'6" and ride 170 on my road bike, 175 on our tandem. Pantani rode 180 in the mountains. He liked to climb OOS so the long cranks gave him more power. It's hard to argue with yellow. I ride 175...
10-06-21, 03:25 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

My wife has a 27" inseam and rides 151mm cranks....

My wife has a 27" inseam and rides 151mm cranks. In the universe where we all ride cranks according to leg length, you'd be on 155mm.
11-19-20, 10:18 AM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

:lol: That's a snippet from a comment. Further in...

:lol: That's a snippet from a comment. Further in that comment, I explained that pedal force would have to increase on a climb if one went to shorter cranks without a gearing change and wanted to...
10-18-20, 04:23 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

My singles have 170mm cranks, our tandem 175. My...

My singles have 170mm cranks, our tandem 175. My stoker has much shorter legs than I. The tandem came with 170mm stoker cranks, but that long a crank made her legs cramp. The crank length on my...
06-23-20, 01:32 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

Here's a simpler way to think about crank length....

Here's a simpler way to think about crank length. Crank length is simply a gearing issue. We can use a standard "reductio" argument here. Given your current gearing, could you do that climb faster...
06-20-20, 12:52 PM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

Wrong. It would have been worse. Longer cranks...

Wrong. It would have been worse. Longer cranks would have helped. If you want to use shorter cranks to spin faster, you have to gear a lot lower, low enough that spinning the longer cranks at that...
06-18-20, 11:31 AM
Replies: 139
Views: 18,040
Posted By Carbonfiberboy

So you use shorter cranks - then you have to spin...

So you use shorter cranks - then you have to spin faster to get the same power, right? The power to rpm curve is different for different folks. For some people, continuous power decreases at high rpm...
Showing results 1 to 14 of 14


 
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