Kinetic Old Style Small Wheel Adapter Allows bikes with wheels smaller than 24" to be used with Kinetic trainers A must for BMX, recumbents and any bike with tires having an outside diameter of 16 to 22 inches FOR USE ON T-002I, T-016, T-007, AND T-006C Newer Kinetic trainers (2.0 and 3.0 models) use model T-580