TRAXXAS TRX-4 23mm Brass Hex Adapter Kit TRX4010X/23M by GPM  [TRX4010X/23M]

23mm Brass Hex Adapter Overview

These 23mm brass wheel hex adapters are an aftermarket upgrade for TRAXXAS TRX-4 style trail rigs that need a wider stance and extra hub weight to steady performance on technical terrain. The adapters are machined from brass with a 23mm hex dimension, producing a thicker profile than OEM hexes to move wheel offset outward and tidy wheel-to-body gaps.

Key hardware included in the kit: Hex Adapter 4pcs, Stainless Steel Screw Shaft M4x2.5x11 4pcs, Shims 5mm 4pcs, 5mm Metal Washer 4pcs, Stainless Steel Hex Socket Screw 20mm 4pcs. Each adapter weighs about 17g per supplier notes, adding useful mass to each wheel hub for traction tuning.

Fitment is generally straightforward: remove the stock hex, fit the brass adapter onto the axle, add shims or washers as necessary to correct offset, and secure using the supplied M4 shafts and 20mm hex screws. Check thread engagement and wheel alignment after assembly; the added width might need trimming or extra spacers depending on wheel and tyre clearance.

Tuning note: the 23mm adapters widen the track and increase unsprung mass, which can reduce roll and improve low-speed composure but will affect suspension dynamics. Adjust shock valving and spring choice to match the new hub mass for balanced handling.

The brass hex adapters are a hardware-complete way to widen track and add hub weight on TRX-4 based crawlers while keeping installation simple.