Size:20 x 4.0 front bike wheelset, suits for 20 inch snow bicycles, fat tire bicycles, electric bike. Compatible with 20 x 3.0/ 4.0 bike tire
The hub: the front hub is 2 sealed bearings, which turns more smoothly and quietly without adjustment and maintenance, with higher waterproof and dust-proof performance
Suits for DISC Brake:this front 20" wheelset only Suits for 6 bolts DISC brake, Please confirm that your disc brake is a 6 bolts disc brake