[Cycler64]

I just bought a new Ultegra 12-27 cassette for my bike, replacing a 105 11-23. I also bought a new chain.

After installing them both, the rear deraillur does not shift down very well from the bigger cogs to the smaller ones. It shifts up great, but rattles and hesitates when I try to shift down.

Any way I can fix this? Thanks.

 

[bsaunder]

location of cog on the hub is probably a little different, need to adjust the cable out a bit on the rear derailleur.