Is an XT, M-770 crank with Dyna-Sys 10 chain rings compatible with a 9 speed system?
05-06-12, 07:57 AM
#1
Bike Junkie
Thread Starter
Join Date: Jun 2005
Location: South of Raleigh, North of New Hill, East of Harris Lake, NC
Posts: 9,622
Bikes: Specialized Tarmac, Specialized Roubaix, Giant OCR-C, Specialized Stumpjumper FSR, Stumpjumper Comp, 88 & 92Nishiki Ariel, 87 Centurion Ironman, 92 Paramount, 84 Nishiki Medalist
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 68 Post(s)
Likes: 0
Liked 37 Times
in
27 Posts
Is an XT, M-770 crank with Dyna-Sys 10 chain rings compatible with a 9 speed system?
I'm looking to upgrade the cranks on my MTB. I like the look and design of the Shimano XT, M-770 crank. My question is, can I use these cranks with 10 speed "dyna-sys" chain rings on a 9 speed system. When this crank came out it had 9 speed chain rings, but when I did a search on ebay, the only units I found in any nice condition had the 10 speed "dyna-sys" chain rings. Are there any differences between the 9 speed chain rings and the 10 speed, dyna-sys chain rings or are they interchangeable.
I'm installing this crank on a 07 Stumpy with SRAM X-9 system. The current crank is a plain Jane, Shimano Hollowtech I, splined three piece unit. Thanks for any replies.
I'm installing this crank on a 07 Stumpy with SRAM X-9 system. The current crank is a plain Jane, Shimano Hollowtech I, splined three piece unit. Thanks for any replies.
__________________
Roccobike BF Official Thread Terminator
Roccobike BF Official Thread Terminator
05-07-12, 07:26 AM
#2
Bike Junkie
Thread Starter
Join Date: Jun 2005
Location: South of Raleigh, North of New Hill, East of Harris Lake, NC
Posts: 9,622
Bikes: Specialized Tarmac, Specialized Roubaix, Giant OCR-C, Specialized Stumpjumper FSR, Stumpjumper Comp, 88 & 92Nishiki Ariel, 87 Centurion Ironman, 92 Paramount, 84 Nishiki Medalist
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 68 Post(s)
Likes: 0
Liked 37 Times
in
27 Posts
bump, still looking for an answer
__________________
Roccobike BF Official Thread Terminator
Roccobike BF Official Thread Terminator
05-09-12, 03:34 AM
#3
almost like new
The M770 is a 9 speed crankset. M780 and above bumps up to 10 speed. There will be a slight difference between ring spacing on a 9 and 10 speed set.
You should be able to find an M770 crankset out there.
You should be able to find an M770 crankset out there.
05-09-12, 04:51 AM
#4
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
As a general rule the chainring spacing difference between 9 and 10-speed cranks is very small so it should work. At worst, you might have to use a 10-speed chain.
Thread
Thread Starter
Forum
Replies
Last Post
scooterfrog
Bicycle Mechanics
11
08-08-12 06:55 PM
