The TS-2.3 is constructed from durable powder coated heavy-gauge steel and is manufactured, assembled and calibrated in St. Paul, Minnesota Features extratall uprights and wide calipers capable of accepting most wheels commonly found on Road, Mountain, BMX, and Hybrid bicycles, including wheels with disc brakes, aero rims, and oversized MTB tires Accepts wheels up to 29"+ (with or without tires), rim widths up to 4" and hub widths up to 200mm Spring loaded calipers and arm for accurate readings Can be mounted to a bench, in a vise, or to the 20degree tilting TSB-2.2 molded base (with storage bins) Retailers are not permitted to sell on the Amazon.com marketplace unless authorized in writing by Park Tool