Rear Deraileurs Home › Forum › Bike Forum › Rear Deraileurs Overview Bike Forum Chat Forum For Sale Wanted Forum Help Classified Rules Viewing 7 posts - 1 through 7 (of 7 total) Rear Deraileurs nukeSubscriber Are you running a triple chainset at the front? If so, you'll need medium or long. Posted 7 years ago joolsburgerMember It's supposed to relate to the number of chainrings and size of them. So a triple with a 44t should run a long cage. For a good few years I ran a short cage XTR mech with a triple and had no problems though. Posted 7 years ago bloodynoraMember I intend to run a double chainring up front (22/36) so a medium or short cage rear mech would suffice then? Posted 7 years ago schmikenSubscriber Yep, depends on cassette too though! If you're running an 11-32 or 11-34 I'd recommend a medium, but if you're running a road cassette a short would be fine. Posted 7 years ago OnzadogSubscriber Have a look at the shimano tech documents for them. They'll tell you the total capacity and the max sprocket size they can cope with. Posted 7 years ago bloodynoraMember Thanks for that chaps. Sram XO med cage on CRC looks quite a reasonable price so might be tempted to get that Posted 7 years ago bloodynoraMember What are the pro's and cons of long/med/short rear mechs? Are there any noticaeable differences between them or does it depend on what type of riding you do or how light they are? I'm in the market for one but would like to keep things light so a short rear mech is lighter, right? but is it better?? Dumb question alert btw 🙂 Posted 7 years ago Viewing 7 posts - 1 through 7 (of 7 total) The topic ‘Rear Deraileurs’ is closed to new replies.