Re-post of deore crankset question?

Question

The crankset is a shimano deore hollowtech mega9 . currently working with a 7 speed cassette. i have aquired an xt 8 speed rear mech(derailier) and was wondering if the 8 speed mech is compatible with the 9 speed front crankset? obviously i'll need an 8 speed cassette to match. any help would be appreciated thanks

Answer 1

Ok. The 8 speed cassette is wider than the 7 speed one so it wont fit on your freehub.(8 and 9 speed are the same width) You can use the rear mech with your 7 speed set up if you like without having to change the freehub, shifters, cables etc.

Answer 2

You can use your 8-speed mech on your current 7-speed setup fine.

You cannot use your 8-speed cassette on a 7-speed hub. Though there is a chance it's an 8/9-speed hub with a spacer on it, that's incredibly unlikely if it's the original wheel (7-speed hubs are cheaper).
If you're wanting to go up to 8-speed, you'll also need new shifters.

Your crankset's not bothered how many gears you run, so long as it's not too wide for the chain. 1,5,6,7 and 8-speed chains are all the same width. 9-speed ones are skinnier and 10-speed skinnier still. So a 9-speed crankset will work with any number of gears from 1-9.

Answer 3

Ok, I think that the front crankset doens't care how many speeds you have at the rear. So if you have a Shimano Deore Hollowtec II, you can put whatever cassette and rear deraileur you want. But I really think that you'll need to change your shifters also.

What you need to change is:

chain
cassette
deraileur
shifters
(probably) cable

Answer 4

basically undeniable "Deore" is sturdy, Deore LX is large, and Deore XT is waaaayyyy large. then you certainly've XTR this is the perfect of the line for Shimano and priced as such. incredibly some motorcycles will contain a LX front derailler, XT rear derailler mixture. in case you may get that, then you certainly've a good ingredient set. The LX and XT cranks are regularly reserved for the $1500 and up motorcycles.