Accepts wheels from 16 to 29 inch with or without tire Supports hubs up to 157 mm width. Truing of 20 mm or other dimension axle wheels requires additional adaptors. The calipers enable simultaneous radial control of the wheel position on both sides, with an additional possibility to control radial symmetry in relation to the hub. The calipers have plastic coated tips to prevent scratching the rim. Spring loaded upright arms and the caliper arm can be quickly pulled away, automatically springing back to a set position when inserting a new wheel 
