The Alienation Feather Weight tube is made from TPU rather than butyl, which brings a 20 inch tube down to 67 grams. That saves precious grams where it matters the most, out at the wheel.
It is built for BMX racing and street use, with improved puncture and snake bite resistance over a standard butyl tube and better air retention as well. It fits 20 x 1.75 to 2.50" tyres on ISO 406 rims and uses a premium Schrader valve with a 40mm stem.
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