HPI Bullet Compatible Front Knuckle Arms Gunmetal for BULLET 3.0 MT and ST - BUL-18000-GU by Jazrider  [BUL-18000-GU]

Tuning and handling impact

This front knuckle arm set is an aftermarket replacement for HPI Bullet rigs aimed at pilots who tune handling response. The gunmetal alloy increases front-end stiffness compared with plastic pieces, which can give crisper steering response and reduce flex-induced steering vagueness while preserving the model's original suspension geometry.

Fitment pays attention to the Bullet chassis variants that use the BULLET 3.0 MT and ST patterns; confirm your chassis drawings or parts list to check knuckle pivot and ball stud spacing before ordering. These arms fit as direct-replacement parts and attach to the stock steering knuckle pivots and uprights.

Tuning notes: when swapping to alloy knuckles, recheck caster, toe and steering link lengths since the altered flex profile changes feedback. Tighten hex screws to spec and revisit settings after a few test laps to find the new handling balance.