Bicycle Mechanics - cassette installation question...

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nietsmas
08-18-07, 06:15 AM
i'm going to bring my rear wheel in to a bike shop to have them swap cassette's for me. does the rear or front derailler need to be adjusted, or does it not matter?

thanks.

gmason
08-18-07, 06:35 AM
It shouldn't matter. But in practice I have had to make minor adjustments in the rear on occasion when swapping.
nietsmas
08-18-07, 06:39 AM
It shouldn't matter. But in practice I have had to make minor adjustments in the rear on occasion when swapping.

thanks. i'm swapping a 12/27 to a 12/23 on a shimano ultegra setup

gmason
08-18-07, 07:02 AM
I am Campa only, but the principles are the same.
barba
08-18-07, 07:10 AM
If your chain is at all old, I would consider getting a new one installed as well.
nietsmas
08-18-07, 07:18 AM
If your chain is at all old, I would consider getting a new one installed as well.

thanks for the advice. it's relatively new. i had had the 12/23 on for all of this year until about two weeks ago to prepare for a real hilly ride. i brought the entire bike into the shop and wasn't sure if they had adjusted the derailler. today i need to have the 12/23 put back on but only want to bring in the rear wheel.
JBS103
08-18-07, 03:02 PM
Worst case scenario is that you need tiny cable tension or set-screw adjustments to get it smooth, although I wouldn't fear any issues to begin with. Chain length and tension shouldn't be an issue as you have run this set-up before if I read you correctly.

Good luck.