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Thread: Lost crank cap

  1. #1
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    Lost crank cap

    Hello, today i was riding when suddenly my left crank bolt went loose. I tightened it with my multitool but i lost the cap somewhere on the trail. Does anyone know where to find these caps? Thank you.
    Attached Thumbnails Attached Thumbnails Lost crank cap-20200621_204228.jpg  


  2. #2
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    The LBS might have some lying around. For these cranks, they're basically cosmetic and not necessary.

    One problem. Once a crank arm is ridden while loose, the taper can get distorted such that it will never remain tight again. Hopefully that hasn't yet happened to you. BUT! you need to torque that crank bolt properly to ~30 ft-lb.
    What, me worry?

  3. #3
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    Same happened to me the other day. I bought mine here:
    https://www.universalcycles.com/shop...ls.php?id=9797
    whatever...

  4. #4
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    ^^^ totally different crank and cap.
    What, me worry?

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    Quote Originally Posted by Lone Rager View Post
    The LBS might have some lying around. For these cranks, they're basically cosmetic and not necessary.

    One problem. Once a crank arm is ridden while loose, the taper can get distorted such that it will never remain tight again. Hopefully that hasn't yet happened to you. BUT! you need to torque that crank bolt properly to ~30 ft-lb.
    oooh yes, today it got loose again. I bought my CUBE bike online because the local retailer was out of stock and the bike shop i bought my bike from is about 360 km from my location. If i get the bike to my local bike shop (he is a CUBE retailer too) will the guarantee be valid? (CUBE guarantee, signed from the bike shop i got it from). I know for example Husqvarna's guarantee for chainsaws can be valid across any Husqvarna retailer, is this the case with bikes? or it will be another "just riding along" case for my LBS? How much would this cost me if i should pay? Thanks

  7. #7
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    Good job! How to fix.

    Hello,

    Total bummer this has happened but it can be repaired fairly easily with a little time and the right parts.

    If I read your post correctly the nearest "Cube" dealer is 200+ miles away? If you don't mind ordering the replacement parts you can fix it yourself with little effort and cost. If you could please let us know the exact part number of your crank set (should be stamped on the bottom of the crank arms) we can help to make sure you get the correct parts.

    For example (yours looks like a cartridge style bottom bracket but just as an example for a Shimano Hollowtech crank set with an outboard bottom bracket). The process is similar across most crank sets.

    You will need:

    1.)

    The crank arm fixing / pre-load bearing tool ($8.50):

    https://www.amazon.com/SHIMANO-Hollo.../dp/B0013B2VDY


    2.)

    The replacement crank arm fixing bolt / cap ($7.90):

    https://www.amazon.com/Shimano-fc-m5...-goods&sr=1-17


    While not absolutely necessary, it's also a good idea to have a cheap beam style torque wrench (you can use online conversion charts to convert to Newton Meters):

    https://www.amazon.com/Tooluxe-03703...autoguideoa-20



    Here are a "How to" video so you can see it's not too difficult of a repair:



    https://www.parktool.com/blog/repair...nstall-a-crank

    https://bikebooboos.com/drivetrain/c...oosefalls-off/



    If any of that above makes you feel uncomfortable than you could always call the dealer for "Cube" or even perhaps take it to a local bike shop that's closer as they can make that repair in no time for very little cost.

    I hope this helps you some in getting the bicycle repaired and back out on the trails. Keep us updated. Thank you

    Best regards,
    Jason
    Last edited by Plusti; 2 Weeks Ago at 08:06 AM. Reason: Typo.
    “It never gets easier, you just get faster.” ~ Greg LeMond

    2012 Specialized Carve

  8. #8
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    To my knowledge, any authorized dealer for a brand can address warranty issues. I'm not familiar specifically with Cube, but that's how all the other brands I'm familiar with work (in the USA).
    What, me worry?

  9. #9
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    thanks a lot!!

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