Savage 21/25 40 Series Wheel Insert HSA-033 by 3Racing  [HSA-033]

40 Series insert for Savage 21/25 tyres

The HSA-033 insert is a compact scale part intended for HPI Savage 21 and Savage 25 setups. Packed as one pair, it locates between the rim bead and the tyre carcass to help maintain tyre shape during aggressive off-road driving.

Compatibility centres on Savage 21 and Savage 25 running 40 Series tyres. To fit, remove the tyre from the rim, place the insert so it sits evenly on the rim seat, then refit and secure the tyre using glue or clips depending on your wheel system. For foam or multi-density tyre builds inspect seating before final adhesive to prevent trapping the insert.

From a tuning perspective the insert supports the bead and reduces sidewall roll under cornering loads, affecting traction and steering precision. Pair the insert with tyre choice and pressure or foam adjustments to tune steering response and mid-corner grip for practice or timed sessions.