-15 mm Lowering Rear Shock Spring Wilbers The only difference is that

The only difference is that it omits the compression reservoir and thus the option to adjust high- and low-speed compression

Diagonally mounted compression reservoir

the Wilbers upgrade delivers a much smoother and more sensitive fork response

Spring Type: Premium linear springs (optimized per specific bike weight and application requirements)

offering a wider adjustment range than the unit installed ex-works

-15 mm Lowering Rear Shock Spring Wilbers The only difference is thatThe Progressive Lowering Rear Spring is designed to lower the bike while enhancing ride quality. It fits onto the original shock, offering a straightforward upgrade for improved comfort and performance.