BMax4 Compatible Rear Spring 12100 (Orange Soft) - Yokomo YOKBMS12100  [YOKBMS12100]

Yokomo BM-S12100 - BMax4 Rear Shock Spring 12100 (Orange/Soft)
Price:
NZD$18.34
Brand:
Yokomo
Model:
YOKBMS12100
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BMax4 Spring Specification and Use

This rear suspension spring is produced for use with BMax4 rear shock assemblies. The orange soft winding gives a lower rate that suits setups needing added rear compliance and improved low-traction performance for 1/10 electric touring cars.

Fitment concentrates on BMax4 shock bodies and conventional spring retainers used with that platform. To install, remove the shocks from the chassis, depress the spring cap, remove the old spring, fit the replacement, then restore preload and verify ride height. Standard RC tools like hex drivers and shock pliers are adequate for safe handling.

Tuning guidance: a softer rear spring reduces the rear axle's sprung stiffness which can increase mechanical grip but may also increase roll and squat under power. Coordinate spring choice with your shock oil weight and piston selection, make small changes, and evaluate handling on the track.
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

How do I check if the spring will fit my shock?

Confirm the spring length and the shape of the spring ends match your shock retainers. If those dimensions align with BMax4 specifications, the spring should seat correctly.

Should I change oil or pistons when fitting a softer spring?

Often yes. A softer spring usually pairs well with slightly heavier damping to control body motion. Try modest increases in oil viscosity or adjust piston choice to preserve desired damping and rebound.

Will a softer rear spring improve traction?

It can increase mechanical grip by allowing better tyre compliance, especially on loose surfaces, but balance is key since too soft a setup can harm cornering precision.

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