These GPM aluminium hex adapters add a 23mm total width to your wheels to stabilise cornering and slow-speed control. The central hole is 4mm to suit common axle dimensions and many wheel types.
The adapters use an O-ring on one face and a spring steel retaining ring with washers on the opposite face to ensure a tight fit. An internal delrin collar holds the hex steady and reduces wheel slip during demanding Axial SCX-10 II crawling sections.
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