XRAY 358279 Long Progressive Springs Soft-Medium Rear Tuning  [XR-358279]

Rear suspension tuning for tighter cornering

XRAY's 358279 Long Progressive Springs provide a refined tuning option for racers seeking more rear traction. These long progressive springs use a soft-to-medium rate and are marked with two stripes for quick ID, and they are intended for rear installation on XB808 and XB9 models to improve handling through turns.

Engineered to ramp up grip as you push harder

Born from track testing, these springs deliver a noticeably progressive curve versus standard XRAY springs. The initial soft section increases contact and grip on turn entry, then stiffens as compression grows to sustain speed through the corner. Every spring is measured and matched so damping behavior is consistent from pair to pair for reliable setup tuning.

Carefully matched pairs for consistent setups

Each spring is compressed in precise increments and recorded during production to ensure matching performance. That process yields pairs that behave the same lap after lap so you can focus on setup and driving lines rather than unpredictable suspension differences.