Matieral: Alloy,aero rims, 42mm ,seemless welding, double wall. Tubes Valve length & Tyres:should use tubes with 60mm presta FV, suggest use max tyre 451 13/8, 406x1.5-1.75. Fits for 20" 406 451 ( 20" 1 1/8" or 1 3/8) Minivelo or Folding bike,such as FNHON BLAST STORM TORNADO,P8,P18 V brake type bikes.
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