This pair of wheel hex adapters increases track width by 25mm on Axial SCX10 II platforms while maintaining a compact assembly. Each unit is specified for wheels with a 5mm hub diameter and designed to fit 4mm threaded wheel shafts to allow reuse of matching wheels.
The retention architecture combines an O-ring seal on one face with a spring steel retaining ring, compression spring and washer stack, and a stainless steel screw on the opposite face to clamp the assembly. A Delrin locating collar inside the hex precisely centres the wheel and resists relative rotation under crawling torque and low-speed traction conditions.
In tuning these adapters serve as a track-widening upgrade to increase lateral stability on technical terrain. Verify axle thread and wheel hub dimensions prior to installation, ensure the retaining hardware is correctly assembled and compressed, and confirm the Delrin collar locates the wheel concentrically to prevent imbalance or runout.