Tire wear on chainstay, Coat with JB Weld? photos- Mtbr.com
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  1. #1
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    Tire wear on chainstay, Coat with JB Weld? photos

    It looks like mud or gravel stuck to my rear tire and scratched into my chain stays a little. What would you do about it? I think a thick coat of JB Weld should solve the problem but I'm open to suggestion.

    Here are photos of the stays. The worst one, the one without the barcode, is about the size of a nickle. This is a Giant XtC 29" bike with Maxxis Ikon 2.35 tires. Normally there is about 5mm clearance between the tire and the stays. The tire is about 0.5mm closer to one stay than the other.

    Tire wear on chainstay, Coat with JB Weld? photos-201806205ds-2005.jpg

    Tire wear on chainstay, Coat with JB Weld? photos-201806205ds-2014.jpg

  2. #2
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    The only thing that I would do is run a smaller tire.
    "These things are very fancy commuter bikes or really bad dirt bikes, but they are not mountain bikes." - J. Mac

  3. #3
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    You don't need to do anything. The aluminum won't corrode, so unless you hate looking at the missing paint or something, just keep riding it.

    -Walt

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    Quote Originally Posted by Walt View Post
    You don't need to do anything. The aluminum won't corrode, so unless you hate looking at the missing paint or something, just keep riding it.

    -Walt
    If it was an aluminum frame I would be less concerned but it is a CF frame and I think dirt and rocks can chew through CF and regular epoxy much faster than aluminum. (The bike is a Giant XtC Advanced Composit 29) A good coating of CB Weld might totally solve the problem forever or I might have to reapply it occasionally. I'd like to keep using 2.35 tires in the back so I will try JB Weld for now and keep an eye on it.

  5. #5
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    Sorry, my reading comprehension sucks this evening. I am old enough to associate Giant with cheap functional aluminum and nothing else.

    If you want to actually protect the area, JB weld isn't going to do much. Best case scenario it'll just pop off if something hits it, worst case it'll bond well enough that it'll take a bit of the stay with it.

    Either run smaller tires or stay away from mud.

    -Walt

  6. #6
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    I have a similar problem but worse and my more drastic fix to continue running big tyres is I'm sanding back the paint, glueing on a thin sheet of titanium then sealing it with resin.

    In your case your wheel is probably just flexing a bit, so stiffer wheels could fix it. Proper ultra clear resin is available on eBay, could use nail polish for colour if it bothers you.

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