I just went from a giant to a saber and found that a good 80 miles or so with an allen wrench did the trick - also one legged drills on the trainer really helped me get dialed in and get my cadence back up in the new position

I apologize in advance for sounding like a broken record, but it will depend on how (and who) you were fit.

This is what I mean:

There is the school of "Fit by Adaptation". This is when a fitter puts a person in a technically correct position (read Dan's stuff on this site to see what that looks like), steps back and says "VOILA! I declare you fit. Get used to it..."

Then there is the "Fit by Facilitation" school, where the customer is basically fitting themselves and the fitter is merely making changes to the bicycle's configuration and adjustment to facilitate the needs/desires/comforts/discomforts of the rider.

These two schools of thought represent extreme ends of a scale. Each customer should be individually fit along a continuum between the two schools of thought.

You shouldn't fully facilitate someone during a fit- they have to be willing to make some adaptation to a better riding posture.

By the same token, you can't expect a casual, entry level athlete to sit like Bjorn Andersson either. There has to be some reasonable combination of the two. The degree of the combination should be determined by an experienced triathlon bike fitter who understands what to listen for and look for when working with the customer.

I beleieve when the bike leaves the store you should be able to functionally ride an hour minimum with a lot of problems. If there are problems, the fit needs to be more "Facilitated". That is why we give people 1 year of free re-fitting.

Now, that said, it takes time to get accustomed to the position- and you have to invest that time before you start crying about your crotch hurting (so does mine) or your back and neck bothering you. That may not necessarily be all fit issues- it may be minor conditioning issues that should correct themselves in 4-6 weeks or about 600 miles.

Remember, bike fit is dynamic: Your position will change and (hopefully) evolve toward being better as time goes on.

At any rate, good luck shopping and enjoy your new bike!

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Tom Demerly
The Tri Shop.com

Further to what Saint Thomas said, if you were fitted correctly in the first place, then your time to adapt to the new bike should be zero to minimal.

6-7 weeks is more than enough time to adapt to a completely new position, let alone minor tweaks.

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