Ohlins 89mm Stroke Light Weight Spring Race-Ready Weight Your rear shock can easily be fine-tuned. Depending on your weight and your riding style, you might be using the wrong spring. The Ohlins 89mm Stroke Light Weight Spring has advanced technology featuring a multi-step surface treatment process as well as cutting-edge heat treatments and wire materials. Features Available in different spring rates Advanced technology featuring multi-step surface treatment process Cutting edge heat treatments and wire materials for lighter springs | Ohlins | 89Mm Stroke Light Weight Spring 411 Lb/in (72 N/mm)