MTB wheels should be rigid, durable and light. There are several axle and frame standards in the MTB world, so it is important to consider the wheel size, the installation dimension (110 mm boost, 100 mm classic) and axle system (15 or 20 mm thru-axle or quick release) as well as the brake mounting, centre-lock. Also, for modern MTB fans, it is advisable to consider the possibility of a tubeless setup and wider rims, as this offers wide MTB tires a better fit on the rim and helps to improve traction, control and comfort.