Results 1 to 6 of 6
  1. #1
    mtbr member
    Reputation:
    Join Date
    Jun 2013
    Posts
    115

    Shimano FC-M552 Hollowtech II, 42x32x24T 175mm, 3x10 speed - can i change to 22T?

    I've got the Shimano FC-M552 Hollowtech II, 42x32x24T, 175mm, 3x10 speed. i picked up a 22T XT Shimano ring real cheap - Can anyone advise if i can use XT 22T for the front granny gear for my crankset? Would i need to adjust the front deraileur or will it be ok?

  2. #2
    mtbr member
    Reputation: PerthMTB's Avatar
    Join Date
    May 2011
    Posts
    440
    Shouldn't be a problem so long as its a 64 BCD bolt pattern. You may get a little bit of chain rub on the bottom of the cage when in the smaller gears on the cassette, but you shouldn't use these much anyway, and if its a rear suspension bike, the suspension sag when you sit on it should lift the chain clear.

  3. #3
    mtbr member
    Reputation:
    Join Date
    Jun 2013
    Posts
    115
    yes it does say 64 PCD. and it's four bolt. It was only $5 AU! And that's the ring i use most often too - the granny gears!!!

    No i won't be using the front granny with the back smallest cogs - it'll be granny to granny - so it's good yeah?

  4. #4
    mtbr member
    Reputation: mitzikatzi's Avatar
    Join Date
    Sep 2008
    Posts
    1,811
    Shimano don't recommend it.

    A 10spd 24t ring and a 22t 9spd ring will have slightly different chain-lines due to there "shape".

    Some on this forum claim that it works.
    Duct tape iz like teh Force. It has a Lite side and a Dark side and it holdz the Universe together.

  5. #5
    TCW
    TCW is offline
    mtbr member
    Reputation:
    Join Date
    Mar 2006
    Posts
    472
    Works great. Slapped a 22 on my wife's XT crankset for Leadville 100 last year; top of Columbine and Powerline climbs get real steep. She said it shifted perfect so I left it on.

  6. #6
    mtbr member
    Reputation: PerthMTB's Avatar
    Join Date
    May 2011
    Posts
    440
    Some on this forum claim that it works.
    Yep, you can count me in with that group!

    There's a lot of theorising and guesswork around on the topic, so one day I just decided to find out for myself. After a couple of hours with a vernier calliper measuring every conceivable dimension of a 9sp and 10sp Shimano crankset to an accuracy of 0.02mm, the facts are that the chainwheels are the same width, the spacing between chainwheels is the same, and the chainline is the same - so for all intents and purposes they are the same.

    In fact, there's much bigger differences within 9sp cranksets and 10sp cranksets than between them. Things like tooth cutout, ramps and pins alignment, and tooth phase, can all make a big difference to shifting. That's what those cryptic letters like AD, JK, AK etc. stamped on Shimano chainwheels are all about, it tells you whether chainwheels are a matched set or not. So, for example, putting a 36T 9sp chainring that was designed to work in a 26/36/48 combination, with a 9sp 22T/44T instead, will mess up your shifting a lot more than mixing and matching 9sp and 10sp rings of the same 'set'.

Similar Threads

  1. show me a 36t or 34t middle ring for this 10sp crankset? Shimano M552, 42/32/24
    By rfxc in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 11
    Last Post: 06-20-2013, 12:12 PM
  2. Replies: 0
    Last Post: 11-18-2011, 05:50 PM
  3. SRAM X9 3x10 vs Shimano XT 3x10 DynaSys Drivetrains
    By CasinoKiD in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 2
    Last Post: 02-20-2011, 08:43 PM
  4. Are M552 Cranks just 2 year old XT's that Shimano relabeled for the 2011 productline?
    By LORENZ in forum Drivetrain - shifters, derailleurs, cranks
    Replies: 22
    Last Post: 01-12-2011, 07:21 AM
  5. Anthem29 x3 Cranks... Shimano M552
    By LORENZ in forum 29er Bikes
    Replies: 19
    Last Post: 01-10-2011, 03:26 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •