-20 mm Lowering Rear Shock Spring Spring Color:Black race-winning performance without ruining your

race-winning performance without ruining your bike's period-correct look

the non-adjustable cartridge is upgraded to a Wilbers powered by ZF open cartridge with adjustable rebound and spring preload

The model-specific components are precision-milled from aluminum or corrosion-protected steel

progressive fork springs are installed from the factory

– 1× open cartridge for the right leg (rebound + preload adjustable)

-20 mm Lowering Rear Shock Spring Spring Color:Black race-winning performance without ruining yourThe 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.