This component is a rear shock spring intended for the rear dampers on compatible Yokomo B-MAX43 chassis. Marked BM-S12110 and part of the SSS 12110 family, it is provided as one spare spring for rear shock assemblies.
Fit this spring when you change coil inserts during routine damper servicing or when altering baseline spring rates. It works with the existing damper internals and modifies the spring contribution inside the shock, which will influence rear support and rebound response.
Installation follows standard practice: remove the rear shock from the model, relieve spring preload, exchange the spring for the BM-S12110, then reassemble and check static ride height and damper movement. Tweak preload and damping settings to suit grip and track conditions.
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