These GPM aluminium wheel hex adapters provide a 27mm overall width to widen the track of an Axial SCX10 II, improving stability during technical crawling. They are compatible with models using a 4mm thread wheel shaft and hole. Retention is handled by an O-ring and spring steel ring, combined with washers and stainless steel screws to minimise rotation. A Delrin collar secures the hex to maintain consistent wheel alignment and reliable tyre contact on rough surfaces.