Spare HX2 Heelys wheel kit designed for one pair of HX2 shoes. The HX2 range features Heelys with two wheels per shoe.
Notice:
Small size accommodates Heelys: 11-5 (UK) / (29-36.5 EUR)
Medium size accommodates Heelys: 6-7 (UK) (38-39 EUR)
You may determine the necessary size for your specific model by removing the wheel or plug from the shoe and inspecting the indicator.