1991? Klein Rascal Build Help- Mtbr.com
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  1. #1
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    1991? Klein Rascal Build Help

    Hi all,

    Just joined the forum but I've been lurking for quite some time now to help with my Klein Rascal build. This is my first bike build so bear with me. I picked up this Klein Rascal frame on a whim because my last name is Klein and I wanted to build a mountain bike.

    So far, things have been going moderately well. I believe the bike is from around 1991. The SN is stamped under the rear dropout which I believe changed after 1991.

    The issue I'm having is finding a crankset that fits. I purchased a Shimano Deore XT FC M730 crank which I thought would fit but the chainrings won't clear when I put in the bolt on the spindle. The BB spins smoothly and I wasn't planning to rebuild it or change it. Does anyone have any suggestions for a triple chainring crank that will fit?

    Thanks in advance!

    Here is a pic of the frame when I got it and where I'm at now:



    Attached Thumbnails Attached Thumbnails 1991? Klein Rascal Build Help-img_5213.jpg  

    1991? Klein Rascal Build Help-img_5359.jpg  

    1991? Klein Rascal Build Help-img_5258.jpg  


  2. #2
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    Is that a cartridge BB or pressed in spindle?
    WTB: Bomber Z2 1 1/8 steerer, in good to excellent shape OR bomber rebuild kit.

  3. #3
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    Quote Originally Posted by colker1 View Post
    Is that a cartridge BB or pressed in spindle?
    As far as I'm aware, it is a pressed in spindle.

  4. #4
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    Quote Originally Posted by pb34 View Post
    As far as I'm aware, it is a pressed in spindle.
    Can you measure the spindle? Shimano BB spindles on xt/xtr shortenned to 107mm around 93.
    I would measure the spindle first. HOw hard is to find the correct spindle for 730 and work on your BB? I guess itīs 122 or 118mm. You would install new bearings as well if you follow that route.
    If itīs a 107 spindle and you donīt want to work on that BB then you will look for a 737 xt crankset.
    WTB: Bomber Z2 1 1/8 steerer, in good to excellent shape OR bomber rebuild kit.

  5. #5
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    Quote Originally Posted by colker1 View Post
    Can you measure the spindle? Shimano BB spindles on xt/xtr shortenned to 107mm around 93.
    I would measure the spindle first. HOw hard is to find the correct spindle for 730 and work on your BB? I guess itīs 122 or 118mm. You would install new bearings as well if you follow that route.
    If itīs a 107 spindle and you donīt want to work on that BB then you will look for a 737 xt crankset.
    I just crudely measured with a tape measured and it was around 108mm so my guess is it is actually 107 unless there were other close spindle sizes at that time.

    Guess I'll look around for a 737 xt crankset!

  6. #6
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    Do these frames not accept a normal threaded cartridge BB? Seems like an easier route to grab a UN54 with a longer spindle for $20 and use the crank you have.
    WTB: Med Bontrager Ti Lite, PM Me...

  7. #7
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    Quote Originally Posted by jestep View Post
    Do these frames not accept a normal threaded cartridge BB? Seems like an easier route to grab a UN54 with a longer spindle for $20 and use the crank you have.
    I don't believe the Klein frames will accept a threaded BB

  8. #8
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    Quote Originally Posted by pb34 View Post
    Guess I'll look around for a 737 xt crankset!
    Itīs the easier way and the 737 is a nice crankset BUT nothing against doing a full rebuild of that BB.
    WTB: Bomber Z2 1 1/8 steerer, in good to excellent shape OR bomber rebuild kit.

  9. #9
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    If you need a longer spindle, check phil wood, they may have the length you need. Might be easier than a new crank.

  10. #10
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    Quote Originally Posted by donk View Post
    If you need a longer spindle, check phil wood, they may have the length you need. Might be easier than a new crank.
    Provided you have all the tools you need to rebuild the BB. Then yeah... i am all for the older vintage xt crankset.
    WTB: Bomber Z2 1 1/8 steerer, in good to excellent shape OR bomber rebuild kit.

  11. #11
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    Quote Originally Posted by pb34 View Post
    As far as I'm aware, it is a pressed in spindle.
    I don’t have Colkervision, but that looks like a standard Shimano UN-style BB to me... Be very sure before you go looking into Phil Wood because you’re looking at a many multiples price difference.

    A close up picture would seal it.

  12. #12
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    Quote Originally Posted by mainlyfats View Post
    I don’t have Colkervision, but that looks like a standard Shimano UN-style BB to me... Be very sure before you go looking into Phil Wood because you’re looking at a many multiples price difference.

    A close up picture would seal it.
    Here is a close-up pic.




    At this point, pretty sure I'm just gonna go with finding an 737 crankset. There are a handful of them for sale on ebay but if anyone has one they're looking to get rid of, let me know!
    Attached Thumbnails Attached Thumbnails 1991? Klein Rascal Build Help-img_5378-2.jpg  


  13. #13
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    Quote Originally Posted by jestep View Post
    Do these frames not accept a normal threaded cartridge BB? Seems like an easier route to grab a UN54 with a longer spindle for $20 and use the crank you have.
    Nope. Pressfit and Loctited bearings.



    I managed to do my Pinnacle with improvised tools.

    But it is an anxious time pressing and knocking them out.
    Less isn't MOAR

  14. #14
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    Quote Originally Posted by Sideknob View Post
    Nope. Pressfit and Loctited bearings.



    I managed to do my Pinnacle with improvised tools.

    But it is an anxious time pressing and knocking them out.

    Yeah I definitely don't have the official tool and I think I'll avoid an anxiety-producing improv and just try to find a 737 crankset.

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