Whoops! rear wheel advice- Mtbr.com
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  1. #1
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    Listen! Whoops! rear wheel advice

    Bought my daughter a used 12" Hot Rock, the rear coaster was dragging a bit but no big deal. I've built bikes and I know my way around them for the most part. So after disassembling everything and re-packing it with grease I noticed the rear axle is bent.

    Can't find a used coaster brake assembly with the axle and looking at used wheels not having a ton of luck. I see I can pick up a 12" rear with a coaster on eBay for $50 but that would be what I'm into for the bike assuming that wheel will work well.

    Has anyone used threaded rod to replace an axle on a kids coaster brake?? Would be pretty simple to go get some threaded rod, cut it to size, then tap the end that's cut.

    Also, man I wish more kids bikes had replaceable parts and weren't throw aways like they are these days.

  2. #2
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    Just realized this was my first post after lurking for 6 years.

  3. #3
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    You could use a threaded rod, but the size and thread pitch can vary. Could be 3/8, could be 9mm, could be 24tpi, could be 26tpi.

    I have a new 36h coaster hub, a new 12" wheel w/ coaster hub, & used 16" wheel with coaster hub sitting around here (all with axles), but I'm guessing shipping might work out to be as much as just looking for another cheap kids bike near you.

  4. #4
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    How about straightening the bend with nuts or whatever in a vise?

  5. #5
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    Probably a 3/8" by 24 tpi axle. LBS might have one, if not you could get one on Amazon for about $10.
    I brake for stinkbugs

  6. #6
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    Appreciate all the help. I havenít had much luck finding a used rear wheel locally for not much cash so now Iím just trying to hunt down the axle. 3/8 x 24tpi x what looks to be 170mm but Iím not going to complain if i come across a 175 since training wheels are on it and Iíd rather error on the side of bigger. If itís way too big I can always trim it and retap the ends.

  7. #7
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    https://www.ebay.com/p/11024543071?i...xoCt9QQAvD_BwE



    free shipping!



    fyi though pretty much every non-Shimano coaster brake hub out there, which is most of them, are notoriously low quality and no amount of nurturing can save them. Even the Shimano ones aren't what they used to be.
    I brake for stinkbugs

  8. #8
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    ^ don't get me wrong, they'll still usually work fine for their intended purposes but they won't roll smoothly.
    I brake for stinkbugs

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