Tom A. wrote:
h2ofun wrote:
Why are you saying I have to use 200 Cranks?
I didn't.
h2ofun wrote:
I have not said that anywhere. I already changed my trainer to 175's for the last two days. I started the process on one of my race bikes taking the 200's off and going to put 175's back on.
You started this all with a flawed "test" to determine if 175s would "work" for you. You've long stated your preference for 200s. As we've tried to explain the flaws in your test setup, one thing that came out is your misunderstanding of how to adjust the touchpoint positions for the different crank lengths in order to do a true "apples to apples" comparison. That's what I'm trying to address here. It's also obvious that you're quite a difficult student on this subject, hence the need to break it down and take it step by step. So far, you aren't cooperating though, so my patience may be thin.
h2ofun wrote:
I just do not understand your question. I have no specific outcome other than crank length needs to be one of the fit pieces, just like all the other stuff. Seems clearly I cannot mess with crank length without impacting other things, the first is seat height, which I am doing.
You may not understand the question now, but hopefully as we progress along, you'll start to "get it".
So yes, changing crank length changes other things. One of those things is seat height (along the seat tube axis), but there are other just as important dimensional changes that happen as well when changing crank length in regards to the path your foot takes while creating the majority of your power and the other touch points.
However, if I can't even get a clear answer to the first EASY question that was posed, I really can't see much use in going further...so, indulge me in one last attempt:
As you are attempting to find your "best" crank length, in any tests that you do, is it desirable to isolate the effect of changing JUST the crank length? And I will say again, yep, what we are used to feels good. That has been 200's for me for a long time. But, am always open to change. I went to 175's once, but not clear I adjusted things correctly for fit. Now I am going down this road again. Since I have 175's already, they are now on the trainer and bike. (Just have to get my RD adjusted now. Another thing to learn :( )
I have read so much that there is no "best" crank length, so I am not just focusing on that. Now, there are all these folks who push that shorter, shorter shorter is better so trying to listen to them.
Clearly there have been great inputs, and yep, I fully understand, that I could just put a total focus on crank lengths, pound away testing to see what give me the best results, but this seems it might take away from other stuff like comfort, correct fit for my body, etc.
So this is why at the moment, I guess I am saying I have the parts to do 175's, which is a huge reduction from what I have been riding. But, this just makes a lot of other stuff needing to change, so my focus is more on setting up a correct fit for me with 175's rather than putting a single focus on what the "best" crank length is, since so many articles basically say it is a personal preference.
So, i just have no idea what answer you are looking for, so if you have one, let me know.
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