Chainring ratios for a compact 9-sp XT drivetrain



N

ndimoff

Guest
I use a non-standard chanring set of 24/32/34 with a 9-sp XT compact
drivetrain. I replaced the original 22 granny with a 24 because the
chain was rubbing the bottom of the rear triangle of my 2001 Schwinn
Rocket 88 - a known design problem. Now the middle ring needs to be
replaced. Will the FD handle a 24/34/42 ratio? Or should I stick with
24/32/42 or should go with the original ratio of 22/32/42 and take one
or two chain link which is the other cure for the rubbing (but I am
taking a chance as if I go by mistake biggest on biggest then the
chain would be too short and my der. hanger - history)? Any experience
or theorethical agrument will be appreciated.