The Yokomo RP-103BKA front spring is a hard-rate coil with an increased free length of 1mm, created to cut understeer and sharpen steering response on high-traction tracks. It is intended as a scale-oriented upgrade that changes front stiffness without altering shock bodies.
Intended fitment includes YZ-2 and YZ-4 buggies plus YZ-2T trucks; the longer free length and firmer rate limit mid-corner roll and deliver crisper steering on high-grip dirt for buggies and on artificial turf or carpet for trucks. After fitting, review spring preload and experiment with slightly heavier shock oil or minor preload changes to rebalance handling if needed.
Color: black; ideal when a firmer front response is required for exacting corner control on high-traction surfaces while maintaining a realistic RC setup approach.
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