Repairing Tire Bead Rubber
12-14-20, 11:30 AM
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Repairing Tire Bead Rubber
A long time ago, I recall witnessing an auto tire tech apply some kind of flowable black rubber compound to the inside of a wheel rim before applying the tire. I asked him about this and he said that moisture can congregate on the inside of the rim (being metal) and slowly corrode away the surface leading to pitting and eventually slow leaks. That compound bridged the gap, if there was any, and helped prevent further degredation of the rim (I presume). The question is, could such a rubber compound be applied to the exposed beads of a wire bead tire after the factory rubber has been worn off from mounting/removing. I think it might help preserve the tire and extend it's life, especially when the wire bead rusts on a winter bike. Ever seen this done before?
12-14-20, 12:28 PM
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Never. Not once. Hint: wire bead tires are cheap.
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12-14-20, 03:23 PM
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I fill carves (ex due to piece glass sticking in it and cutting further every rotation) with such compound. Pushing it in with a needle, then after all done, deflate the tyre abit, so that the rubber gets pressed inside, to maximalize binding surface.
I also repaired (just once) precisely what you want: an exposed bead due to mounting/unmounting (marathon plus, crap thing to get off / on).
Can't give longer time results, didn't use the bike much since.
I also repaired (just once) precisely what you want: an exposed bead due to mounting/unmounting (marathon plus, crap thing to get off / on).
Can't give longer time results, didn't use the bike much since.
12-14-20, 03:48 PM
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12-18-20, 09:03 PM
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Hi, I have never found Schwalbe Marathons (which I like to use) to be a bargain tire so if I can preserve one to run into the ground I'll do it. And that Dedhed link is interesting! That is indeed the type of stuff to fit the bill. I'll have to try it out on tread gouges too.
12-19-20, 09:20 AM
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Bead Sealer is what you saw him use and that stuff can be really messy, wouldn't want that on my bike wheels.
Glenn
Glenn
12-19-20, 09:37 AM
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Wire bead Paselas are $35. That isn't cheap for all of us.
OP, has exposed bead ever caused you problems? I'm sure there are tires that have beads broken from rust but I have yet to hear about them. Do you ride on salted winter roads? If so, you may well have a case. I never rode clinchers in my Boston and Ann Arbor winter days but I got to know that salt really well. I didn't even try to true my wheels after February. Spokes, nipples and rim were one corroded unit.
If rust is an issue, I might look at seeing if I cold remove those tires without damaging the rubber. Maybe a different tire lever. I'd go first to see what Pedros and Park have to offer and inquire here.
OP, has exposed bead ever caused you problems? I'm sure there are tires that have beads broken from rust but I have yet to hear about them. Do you ride on salted winter roads? If so, you may well have a case. I never rode clinchers in my Boston and Ann Arbor winter days but I got to know that salt really well. I didn't even try to true my wheels after February. Spokes, nipples and rim were one corroded unit.
If rust is an issue, I might look at seeing if I cold remove those tires without damaging the rubber. Maybe a different tire lever. I'd go first to see what Pedros and Park have to offer and inquire here.
