Disc brake and 44mm spacing of center hole to center hole. Tire 2.5 max, worke well on most of 20in bicycles. Aluminum, single rear rim and front rim net weight both 520g. 20 inch Front Spoke Wheel 10G 36 Spokes Double Layer Alum Alloy.
Sealed Axle and High Quality Flange, axle length 145mm. Very Durable with Stainless Steel spokes. Alum Hub with Sealed Axle 145mm and High Quality Flange. Double Wall Rim Front Heavy Duty.
20 inch Rear Spoke Wheel 10G 36 Spokes Double Layer Alum Alloy. Alum Hub with Sealed Axle 175mm and High Quality Flange. Double Wall Rim Rear Heavy Duty.