Owners of older XB series models can improve chassis feedback by fitting the XRAY 358334 rear springs. These 85mm coils are produced to offer steady, repeatable performance for club and scale racing alike.
Each coil is measured and paired so the set shares nearly identical spring rates, which helps the car remain neutral and controllable. The springs are slightly progressive, moving to a more linear rate under heavier compression to suit a range of track surfaces.
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