3
votes
2answers
124 views

Are derailluers always or usually compatible with any cassettes?

Is it OK to choose a derailleur without taking into consideration the cassette that will be used with it and vice-versa?
22
votes
11answers
30k views

Why would one ever buy a 12-25 cassette when an 11-25 is available?

I was looking at purchasing some Sram Rival components. Looking at the available cassettes, there is a big variety of sizes available: 11-23: 11-12-13-14-15-16-17-19-21-23 11-25: ...
11
votes
1answer
923 views

Do I need to change my cassette if I can't see any wear?

I bought a new road bike with Campag Athena 11 speed in March last year. To the end of Jan it had covered 9000km. In all that time I hadn't changed the chain because I don't have the Campag tool, and ...