Kinetic small wheel adaptor mk ii trainerthis is the new small wheel adapter for use on new kinetic 2 a must for bmx recumbents and any bike with tyres having an outside diameter of 22 or less the small wheel adapter raises the level of the resistance unit of any of the kinetic trainers by up to three inches by doing this the trainers fit tyres with outside diameters as small as 16 by using this adapter kinetic trainers accommodate most bmx kids and recumbent bikes compatible with t