XRAY 358280 Long Progressive Springs give racers a controlled, progressive feel that adapts to high-speed cornering. The medium-rate springs carry three clear stripes for quick ID and are intended for rear use on XRAY XB808 and XB9 models.
These springs are built to provide a softer initial response to increase grip when your car enters a turn, then firm up under higher load to keep cornering stable and predictable. That progressive curve helps maintain consistent handling through varying track conditions.
Each spring is measured and paired so both sides share the same damping behaviour. That quality control helps you set predictable chassis balance and reduces unexpected handling changes during a race.
A practical upgrade for racers aiming to sharpen rear-end grip and corner exit stability without major setup changes.
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