• I recently purchased a bike that came with Weinmann 700C-17x622 and I can not get tires to stay on. I if bring the tube up to pressure it takes less then a kilometer before the tire pops off the rim, on both sides, and if I ride them with way less pressure, it just increases the time it takes before the tire pops off. I am not a whale, at around 80 kg, and I have taken the tires off and reseated them, the tubes I have are 700x20s. There is some vertical shift in the rim, but the places where the tire comes off varey, so I can't say for sure if that is the problem. On the front I have a Continental Gatorskin, and on the back a Schwalbe Blizard Sport (came on it, the front one blew out around the bead) and both seem to just fall off the rim.
    Any suggestions would be much appreciated, as far as maybe new tires or rims or tips. Thanks

    ps. These rims are quite shallow, just about 10 mm on cross section.

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