Yokomo presents the B9-SSP240A Progressive Shock Spring, a precision replacement built for the BD9 chassis. Created with AXON input, the spring uses an unequal pitch coil to deliver a progressive rate that ranges from 2.40 to 2.70, making it well suited to high big bore short shock setups.
Progressive springs change stiffness through travel so the initial feel is softer while mid and end stroke firm up. That behaviour improves corner entry stability and helps manage traction during aggressive driving. The Yokomo B9-SSP240A adds this adaptable characteristic to your tuning toolkit.
This shock spring is compatible with many Yokomo platforms, including MRTC-BD10FF, MSR-BDFWD and MRTC-BD919. Use it when refining a race setup or when upgrading stock springs for better mid-stroke control.
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