Sprindex Adjustable Weight Rear Coil Spring - Enduro, 540-610 lbs, 65mm, 2.6" Stroke

Adjustable spring rate coil that's also progressive. Sprindex is specifically designed to have a progressive spring rate for the last 20% of stroke for big hit support and for bikes with a linear linkage design.
Adjustable spring rate
Adapters included for different size shocks and set ups
Made of super high tensile spring steel