Fox Options:
1.5": for shocks with 2.25" ID springs; 1/4" x 2.5" leg length
2.0": for shocks with 2.50" ID springs; 1/2" x 3/8" leg length
2.5": for shocks with 3.0" ID springs; 1/2" x 2.5" leg length
3.0" : for shocks with 3.75 ID springs; 1/2" x 2.5" leg length; with 3/4" thick flat between springs