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I think they do that to keep the tire from slipping around the rim and shearing the valve stem off the tube. If the tire wanted to pull off the rim I doubt glue would hold it - especially if only one side is glued! Having said that, the tire bead is what keeps the tire on the rim and that's the same regardless of tire width. I think the limit on tire width is that as the rim gets wider the tire gets pulled flat so that there's less sidewall height - in the limit the tire would be stretched flat and there would be very little air in the tube. This might be OK for snow riding... -- dazedNcontused - go play in the snow! She was so impressed she didn't even roll her eyes. - Harper ------------------------------------------------------------------------ dazedNcontused's Profile: http://www.unicyclist.com/profile/2147 View this thread: http://www.unicyclist.com/thread/29128
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