UCE front wheels made for classic skiing. Their no moving back system prevents the ski roll backwards, to facilitate propulsion. The polyuethane gum gives them a good durability. Sold by pair (2 front no moving back wheels).
Dimensions: 3" x 1" 11/16 or 3" x 1" 1/2 inch; 76mm x 44mm Weight (by pair): 17.39oz, 493g Hub: alloy Aluminum 7075 Gum: PU Hardness: 82-50 (15-40 km/h)