TECHNICAL SPECIFICATIONSPEED:21SFRAME:ALLOYSIZE:26"FORK:STEELCHAINWHEEL & CRANK:24/32/42.TF/R DERAILLEURE:SUNRUN ( SR-42T )SHIFTER:ST-EF41F/R BRAKE:YIN ING F/R HUB:STEELFREEWHEEL:SUPERWINSADD..