Support 8-10 speed road casstte, ,If MTB cassette like SHIMAN O spec, CS-HG800-11, CS-HG700-11 11 speed, ,also can use 11 speed.

Contains: wheels ,rim tape, skewers,cassette spacer.
Matieral: Alloy
Rims ：KINLIN, NBR ,19mm,or XR240 24MM ,from Taiwan
Hubs: CHOSEN , A8696B A8697B, 28holes or 32 holes , ,front 2 bearings ,rear 4bearings
O.L.D: front 100mm ; rear 135mm
Hole: front and rear 28H, or 32holes
Spokes: Sapim Leader J bent spokes
Nipples： brass PSR
Size: 451 20" 1 1/8" (about 22") or 20" 406 (it is standard 20")
Weight: appro NBR 451 28 holes 1254g; XR240 451 32 holes 1408g
Brake：DISC Brake
Support 8-10speed, for road cassette, only use 10 speed, if MTB can use 11 speed, MTB cassette such as SHIMA NO CS-HG800-11,CS-HG700-11
Fits for Folding bike or minivelo urban bikes.Such brands Tyrell, Tern,FNHON ,JAVA zelo fit aira neo folding bikes
Origin: Made in China
Assembled by SILVEROCK