Brass Wheel Hex Extender Kit for MJX H12Y / H12Y+ / H12P – Set of 4

Brass wheel hex extender and axle kit for MJX Hyper Go H12Y, H12Y+ and H12P RC crawlers. Supplied as a set for four wheels, with the axle shafts and fastening hardware shown in the product photo.

Wheel stance

Estimated extension: approximately 10 mm per wheel hex, or approximately 20 mm added overall track width across an axle when installed on both sides. This is an estimate based on the 13 mm replacement hex and the expected original hex thickness; actual change can vary with the original part and installed seating position.

Specifications

• Wheel hex: 12 mm across flats
• Brass hex body height: 13 mm
• Axle shaft length: 38 mm (as marked in the supplied image)
• Hex bore: 5 mm (as marked in the supplied image)
• Stated kit weight: 66.5 g

Check wheel and axle fit before installation.

Fitment check

Listed for MJX H12Y, H12Y+ and H12P builds. Confirm the shaft length, bearing seats, drive engagement, wheel hex and retaining hardware against your exact axle revision. The estimated track-width increase above is not a verified measurement of the supplied set installed on each model.