XT M739 Crank outer ring replaceable?

[MAXTHEROTTI]

as above really can you change the outer ring on a xt m739 (what does the 739 refer too anyway?)
the outer ring looks like it is part of the outer spider frame?


http://s525.photobucket.com/albums/cc333/tamtruk1/
pic in link



cheers rob

 

[sastusbulbas]

Hi,

The ring and spider are one piece, replacements used to be available, as was a five arm spider only.

 

[MAXTHEROTTI]

so there used to be a 5 bolt ring available for this crank??
any one got one?

cheers rob

 

[dbmtb]

If anyone does, I know where to find stuff like this.

Send me a pic and I'll dig around in our list of obsolete parts.

 

[MAXTHEROTTI]

the crank is in the pic link above


cheers bud
rob

 

[dbmtb]

You might just be in luck. I think I have one of these. Will check tomorrow.

 

[MAXTHEROTTI]

happy days let me know

cheers rob

 

[dbmtb]

Sorry - wrong type after all.

good luck.

 

[BG]

This may be what you're after:
http://www.universalcycles.com/shopping ... tegory=678

or

The 5 arm spider adapter you're after is one of these
http://www.bikeparts.com/productinfo/XT ... 89006.html or http://www.bikeparts.com/productinfo/LX ... 80939.html

I came up with these after doing a quick google search on 'm739 cranks' and 'm569 cranks' BUT I'd email or call any of the online stores to make sure they do actually have it in stock and will ship to where you are.

I had a set of the LX (m569) versions of what you've got. They're practically identical, but the outer ring is black not gold, and arms are forged slightly differently if I remember correctly.

To answer your question about he 'm' numbers, well it the product code for Shimano MTB groupsets, essentially the higher the first number the better the quality (eg, the 'm9XX' series are XTR, the 'm7XX' XT, 'm5XX' LX...), the higher the next 2 numbers the newer it is so your 'm739' come from 1997/98, where as 'm770' cranks are only a couple of years old. But there are much better explainations of this out on the web if you search... probably even on this site.

I had no luck finding replacement chainrings locally and couldn't be bothered to get any shipped to me at the time so ended up buying a whole new crankset - it was a good excuse to upgrade!

 

[dbmtb]

I found one after all..... Well not one but two....

Silver NOS but not stored properly so one or 2 scratches, and as a complete assembly with the 32 and 22T rings.

Black used but not much. Just the 42T.

PM me if interested