Old skool XT Chainrings help

careless_torque
careless_torque Posts: 9
edited July 2011 in MTB workshop & tech
Hi all - first post here - I'm diving straight in with a techie question.

I run a fairly ancient xt groupset '98 vintage - part numbers start with M739. So I have 5 arm cranks and I need to replace two chainrings worn out by several years of commuting. The chainrings are proving difficult to find so my question is in two parts; is there anywhere to find these vintage parts for a reasonable price, or, should I cut my losses, acknowledge that I'm a victim of inbuilt obsolescence and modernise with a newer crankset?

Comments

  • nicklouse
    nicklouse Posts: 50,675
    what you do comes down to how much you want to spend.

    I would replace the cranks.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • benpinnick
    benpinnick Posts: 4,148
    Measure the bolt circle. I may have fairly good nick ones.
    A Flock of Birds
    + some other bikes.
  • estampida
    estampida Posts: 1,008
    middleburn still make all sizes and crank interfaces of chainring's
  • careless_torque
    careless_torque Posts: 9
    Thanks for the replies, food for thought.

    nicklouse - you may well be right - ebay to the rescue!

    benpinnick - I'll try to measure but not tonight as I have c_t junior giving it 90 dB in my ear'ole. a picture will be conclusive too - i'll take or find one. (hold the goods!!)

    estampida - I'll check 'em out - thanks.
  • nicklouse
    nicklouse Posts: 50,675
    your BCDs are 94 and 58mm

    http://www.middleburn.co.uk/chainrings_cd.php


    EV_FC-M739-5.gif
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • careless_torque
    careless_torque Posts: 9
    Thanks - that's really helpful. Looks like it's the Middleburns I'll go for.

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