FXR Helium Speed Boots Size:M 10 / W 12 Any final drive gearing change

Any final drive gearing change has effect on rate of shift and clutch calibration

VELCRO® brand closures tab locks the zip pull closed keeping it flat and secure

The instructions include a “flyweight set up guide” that explains how to set the flyweights for different tires and situations

Liner: 100% polyester

520 XSO and GB 520 XSO

FXR Helium Speed Boots Size:M 10 / W 12 Any final drive gearing changeFXR Helium Speed Boots Features Single anti slip lace with molded lace hooks HydrX Pro Membrane High Performance boot for MTN and Trail Riding Engineered to have positive fit & feel, with maximum flexibility, stability and protection Rated to 60 C with 800 g insulation Molded inner heel flex insert for backward flex control and impact support Molded low profile toe box Fixed liner with micro fur lining New speed lace hooks for quick pull & lock lace