HPI Bullet 3.0 MT ST Replacement Adjustable Shock Set BMT3100F/R by GPM  [BMT3100F/R]

Adjustable alloy shocks for Bullet 3.0 series

The BMT3100F/R is an aluminium alloy front and rear adjustable spring damper set intended for HPI Bullet 3.0 MT and ST nitro chassis. Sold as one pair, the dampers combine a 3.5mm steel shaft with an aluminium body to offer greater durability than common plastic units while remaining suitable for model suspension mass requirements.

These shocks provide adjustable spring support for tuning ride height and preload at both front and rear. The components are made to match the Bullet 3.0 MT and ST mounting geometry and stroke so they can be fitted as direct replacements for original dampers without changing chassis mounting points.

When tuning, prioritise spring rate and preload adjustments before swapping pistons or oil; the alloy housing and steel shaft focus on mechanical strength and shaft straightness, whereas oil viscosity and piston configuration determine compression and rebound. Fit with standard RC tools, inspect thread engagement and pivot points, and confirm smooth shaft operation before running the model.

This metal-bodied damper set is aimed at hobbyists who want a thicker shaft and improved durability for HPI Bullet 3.0 MT/ST nitro models to achieve more consistent suspension behaviour.