Shimano codes

clanton

is there a system to the codes Shimano use for their MTB stuff? ie XT770 vs XT760 - I'm guessing the 6/7 indicates year of model?

nicklouse

http://www.firstflightbikes.com/shimano.htm

i should also add that there is some form of coding in the groupe name but i dont know it of the top of my head. BRS does.

Big Red S

Shimano part numbers are of the form

AB-Cwxy
Where AB and C are letters, and w, x and y are letters.

AB denotes which bit of the bike it is, some examples:
RD=Rear Derailleur
FD=Front Derailleur
HB=Hub (front)
FH=FreeHub (rear hub)
HP=Headset
CN=Chain
CS=Cassette
BR=Brake (caliper)
BL=Brake Lever
SL=Shift Lever
ST=STI levers (road or mountain)
CB=Cable
WH=Wheel
FC=Front Crankset
BB=Bottom Bracket

C denotes which discipline. M for Mountain, R for Road, A or T for Audax or Touring.
So BR-Mwxy is a mountain bike brake caliper.

w is used to denote the product group:
M3xy and M4xy are below Deore
M5xy is Deore
M6xy is LX and Hone
M7xy is XT
M8xy is Saint
M9xy is XTR

The x is the 'major' change. M95y was the matt XTR, M96y was the shiny, M970 is the latest.
The y are minor variations. RD-M951 was the rapid-rise version of RD-M950. But otherwise they are exactly the same. They do similar things with front mechs and clamp sizes, too.

You also sometimes get letters after the codes. RD-M951 SGS is the SGS version.

clanton

Fantastic info - thanks! Is there anywhere that lists what those differences are between the numbers?
For now I'm specifically interested in what differentiates the XT760 chainset from the XT770 one.

supersonic

As above, its a new crank - look up the parts and you can see the difference.

Will Snow

clanton wrote:

Fantastic info - thanks! Is there anywhere that lists what those differences are between the numbers?
For now I'm specifically interested in what differentiates the XT760 chainset from the XT770 one.

I think, without looking one is 44 32 22 cobo, (760???) and the other is a 48 36 22 (770???) Dont quote me on that though, though im pretty sure it is chainrings.

stu8975

M770 is the 44,32,22 ive just got one, redesigned crank arms, steel/carbon composite middle ring, thicker 44 ring, roughly the same weight give or take a few grams lighter.

Big Red S

Will Snow wrote:

clanton wrote:

Fantastic info - thanks! Is there anywhere that lists what those differences are between the numbers?
For now I'm specifically interested in what differentiates the XT760 chainset from the XT770 one.

I think, without looking one is 44 32 22 cobo, (760???) and the other is a 48 36 22 (770???) Dont quote me on that though, though im pretty sure it is chainrings.

Both FC-M770 and FC-M760 come with 44/32/22. I *think* the 48/36/26 from the M76x series is FC-M762. I Don't know if there is one for next year (M77x).

But they are entirely different cranks. As I said above, the second number changing indicates a complte overhaul of the groupset - it's not just different configurations of the same product:
FC-M770:

FC-M760:

Will Snow

whoops!!! my bad. Sorry, twas just skim reading. Interesting thread, btw

skyliner

The 48,36,26 version of the earlier one is the M761. We have one fitted to a Nicolai helius CC test bike.
Along with the FD-M761 type 3 front mech.(profile specific for 48t)
AFAIK, this group was designed for Hybrid bikes, but lends itself well to mashers* (*read masochists) who prefer grinding big gears uphill.

I'm not sure whether they'll produce it in M771 form either though. (they should, because the middle ring will survive more than 5mins on this one)

leonlikestrees

So any idea what the XT M762 chainset is then? It's on some 2008 Specialized's. Looks like an '07 XT chainset in a slightly different colour. Seems odd now there is a 2008 one out.

Perhaps specialized got them cheap...

nicklouse

it is a special for the Big Red S.

leonlikestrees

but what does that mean?

Special as in "we'll have all your old 2007 XT chainsets off you", or something different?

nicklouse

yep lets have them in a differnt colour will cost less than 2008 and look different to 2007....