's Forum Archives - Racing

Archive Home >> Racing(1 2 3 )

Training bike fit vs. Racing bike fit(5 posts)

Training bike fit vs. Racing bike fitkrishna
Feb 21, 2002 11:05 AM
So in a week or so I'm going to be getting my very first, true, racing bike. Right now I've got my, soon to be old, bike setup on the trainer & I'd like to keep using it as such. The potential problem is that the fit will be quite different than my racing bike. Specifically, the crank is 170mm (old) vs. 172.5 (new), the handlebar width 42cm (old) vs 44cm (new) and the reach different due to overall frame geometry.

Given that I don't have the means to swap out handlebars & crank, will I do myself harm by continuing to train on the old bike?

BTW: The fit on the new bike is per professional recommendation...
re: Training bike fit vs. Racing bike fitmixinbeatz
Feb 21, 2002 11:32 AM
I would try and get the same size cranks on both bikes to eliminate any potential problems(sore knees, different feel). Bar width will most likely not pose any issues but if the drop is more it may take your back a while to adjust. If your old bike is comfy, I would be a little cautious about changing your reach at all. I had my bike professionally fit, and after 6 months of riding, I switched back to the stock reach I had been riding for years. I just could not get comfy enough in that position.
Find a fit you like(reach, seatpost, bar drop), and make both bikes the same.
re: Training bike fit vs. Racing bike fitbrider
Feb 21, 2002 1:15 PM
The shop should switch the parts that aren't to your liking for a very reasonably fee -- you shouldn't have to buy new parts. If you prefer the 172.5s, then go with that, and insist the shop do the switch for you. However, if you're going to be primarily riding the race bike, then you can just swap the parts over yourself and have the "odd" set-up on the trainer.
I disagree with some assessments, hereshirt
Feb 21, 2002 1:56 PM
I train on both 170 and 172.5. I race on 172.5. Like cross-training, I think doing things to work your muscles differently is very good for you. I even play around with seat height and fore/aft to get to different muscle groups (very minor adjustments, mind you.)

Regarding bar width, I don't think you'll find any biomechanical advantages one way or the other. I'm pretty old school myself and like narrow bars; they're more comfortable and more aerodynamic. I think the argument that you get better leverage with a wider bar must have been made by a rower or something.

I disagree with some assessments, hereksfacinelli
Feb 21, 2002 6:25 PM
Wider bars.... I think that some people think that a wider bar opens up your chest a bit so you get better breathing..I am not talking about a pair of bars that equate to a breath-right Band-Aid strip just so you are square and not closing off your chest. I have never heard the rower thing but their may be some merit to climbing efficiency.

Just what I believe.......