Bicycle Mechanics - 8 speed with 7 speed derailleur

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bigS
02-20-06, 05:42 PM
Any problems using an 8 speed drive train with a 7 speed rear derailleur?

cuda2k
02-20-06, 05:48 PM
Any problems using an 8 speed drive train with a 7 speed rear derailleur?

Nope (http://thecuda.com/gazelle.htm) - Shimano SIS 6-8 don't care what they are being pulled by.
juicemouse
02-20-06, 06:27 PM
Any problems using an 8 speed drive train with a 7 speed rear derailleur?

No problems unless you're mixing Dura-Ace with non-Dura-Ace.

cuda2k
02-20-06, 09:03 PM
No problems unless you're mixing Dura-Ace with non-Dura-Ace.

An even better answer. :)
jeff williams
02-20-06, 11:08 PM
Don't mix Shimano with SRAM?
If the cluster is the same range I'd think so.
My Deore was designed to do both and I went 2T larger than max teeth low cog.
TallRider
02-21-06, 06:10 AM
You can mix any SRAM cassette with Shimano drivetrain. Some SRAM deraillers are designed specially to work with special SRAM shifters. (SRAM also makes Shimano-compatible deraillers and shifters) However, there's no difference in the cassettes, and Shimano cassettes will work fine with SRAM's special shifters and deraillers, too.
jeff williams
02-21-06, 12:59 PM
Some SRAM deraillers are designed specially to work with special SRAM shifters.

1:1 actuation ratio?
Shimano is 2:1?
I thought Shimano shifters didn't pull enough cable to move SRAM derailers.
Not something I've really looked into, I am likely to change the shifter and derailer to SRAM with the next cluster change rather than mix.
TallRider
02-21-06, 01:05 PM
Jeff: some SRAM deraillers are Shimano compatible. Not the 1:1 deraillers.