Adjustable swing axle spring plate. Stop having to adjust your ride the old fashion way. Use these adjustable spring plates to quickly and easy adjust yourIRS suspension to suit the terrain or passenger count. Requires 2 inches i.D. Inner bushings & 1 7/8 inches i.D. Outer bushings. SOLD AS PAIR Spring plate lengths are determined by the length of the torsion bar that they are attaching to. If you look at the torsion housing and the cap at the end is solid then you need 21-3/4. If the cap has a hole in the middle with a stub protruding you will want to measure the bar Transmission Style: IRS Torsion Bar Length: 24-11/16 inches Quantity: 2 PiecesIrs Spring Plates Adjustable for 24-11/16 Inch Torsion