Take the 2-minute tour ×
Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. It's 100% free, no registration required.

Is it OK to choose a derailleur without taking into consideration the cassette that will be used with it and vice-versa?

share|improve this question
add comment

2 Answers

up vote 4 down vote accepted

No.

It's best, though not always entirely necessary, that the number of speeds match. There are some cross-compatible options, but if you're unsure it's better to just stick with a derailleur and cassette that were designed to work together.

It's also important to consider the size of the cassette in comparison to the amount of chain slack that the derailleur is capable of taking up. A road derailleur will often not work with a mountain bike cassette because it can not take up enough slack to account for the size of a mountain bike cassette.

Generally speaking, a cassette and derailleur that are the same number of speeds, made for the same type of bike, and made by the same manufacturer will be just fine.

share|improve this answer
add comment

No. I made the mistake of buying a nice looking 8 speed SRAM derailleur, to find that my Shimano 8 speed gear shifters, were incompatible. ie One click of the shifter didn't move the derailleur the correct distance to change one gear on the rear 8 speed cassette

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.