Boostor Ultralight Bike TPU Inner Tube 700c X23-32C 32-43C Bike TPU Material Tire French Valve Bicycle Accessories Electric

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I tried Boostor TPU tubes (1000 km with them). So far, so good. No problem at all. They hold air very well even if I don't ride the bike during one week. I think that they are thicker so stronger.