"This wheel chock is designed to directly mount to the 2200EIH lift table series and front extension. It fits front motorcycle wheel sizes from 16"" to 19"", up to 6-1/2"" wide. There is also a narrow tire adapter included for tires that are 3-1/2"" or narrower. This chock is easily operated by one person and has 12 adjustable positions that are self-locking."