Bicycle Mechanics - Problems with 12-27 Cassette

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.

PDA

View Full Version : Problems with 12-27 Cassette

mr_ed

08-17-04, 10:58 AM

I have a 1999 Litespeed Vortex and I recently installed a 12-27 Shimano Dura-Ace 9-Speed Cassette. The top guide pulley rubs the largest sprocket (27T) regardless of the B-tension adjustment screw setting on the Shimano Dura-Ace 7700 Rear Derailleur. According to Shimano specs the derailleur is compatible with a minimum 11T sprocket and a maximum 27T sprocket. Any advice?

:(

Thanks,

Ed

NIBYAK

08-17-04, 11:17 AM

Maybe you need to add a link or two to the chain. Does it touch when you take the chain off at the crank and give it some slack? Just guessing

Trek Rider

08-17-04, 12:11 PM

It seems to me the chain length is wrong. I've heard of people using a 30 cog with no rubbing.

mr_ed

08-17-04, 01:12 PM

Thanks NIBYAK and Trek Rider, I'll take a look at the chain length.

:)

Ed