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  1. #1
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    New question here. Chainring Help Please... XT M752

    I have a 2003 XT M752 Hollowtech crankset (4 bolt). I just tried to replace my 32T middle ring (part of complete drivetrain replacement).

    I ordered an XT 32T 4-Bolt ring, and it doesn't fit. The cutouts for the spider are too close to the BB (spider was just a bit bigger on the 752 than the 760). Turns out this is for the M760 Hollowtech II

    a) Where can I find a 4-Bolt XT M752 chainring?

    b) I know some of you are going to say "Go Ti" (not a bad idea b/c I'm 200 lbs and spend 95% of time in middle ring) but I'm not sure I'm really understand pros/cons of ti rings or ramps & pins. My main goal is the best shifting performance, not spending $40 to replace a ring once/year... Doesn't it make more sense to wear out the rings than the chain? If you wear the chain, you trash the cassette too don't you?

    c) What other easily accessible brands are comparable in terms of shfting quality?

    Thanks!

  2. #2
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    $30 at nashbar- less if you have a coupon code.

    http://www.nashbar.com/profile.cfm?c...eid=&pagename=
    I bike; therefore, I work

  3. #3
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    Quote Originally Posted by VT no 1 2 or 3
    $30 at nashbar- less if you have a coupon code.

    http://www.nashbar.com/profile.cfm?c...eid=&pagename=
    I had some trouble as well going the other way. I tried a older 9 speed XT middle ring on my M760 and the bolts bottomed out before it was tight. It was the same for a RF middle ring. I ended up using shorter Ti backing nuts from old XTR so that it wouldn't bottom out. I can't see any spacing difference while mounted and haven't noticed any performance difference between any of them.

    For you the LX is identical for less money...

    http://aebike.com/site/page.cfm?PageID=30&SKU=CR2994
    http://www.nashbar.com/profile.cfm?c...eid=&pagename=

    Or you might get a steel Deore ring. They are only about $15 and will last forever. It's just a bit heavier.

    Or if you don't think you need all the ramps and pins, the Salsa rings are really cheap...

    http://aebike.com/site/page.cfm?PageID=30&SKU=CR3654

    I just put one of these on my M760 in a 34T. Only one ride but it seems to be fine so far.

    By the time you pay shipping, you might as well go to your LBS. If they are a decent shop, they might even have them in stock.
    Long Live Long Rides

  4. #4
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    Update

    I called a couple of LBS and found a shop that had the LX ring in stock. Looks to be the exact same ring I had on there from the last time I had a shop do a replacement. Put the whole drivetrain back together last night and it appears to be shifting well. Need this rain to stop so I can go test it out on some climbs...

    Thanks for the tips. I'll start another thread to follow up on pros/cons of ramps & pins.

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