FOX Speedframe Pro Defy Helmet Size:- Medium (55-59cm) Compatible with Avid Elixir R

Compatible with Avid Elixir R

Thru-axle tread pitch = 1

install is both simple and fool-proof

Also fits "Power Spline" cranks from SRAM using the 8mm thread bolt

FOX Speedframe Pro Defy Helmet Size:- Medium (55-59cm) Compatible with Avid Elixir RDesigned with input from our pro mountain bike athletes, the Speedframe Pro Defy Helmet has earned Virginia Techs best rating (5 stars) in its Bicycle Helmet Ratings program for a reason. This top tier open face mountain bike helmet offers a market leading feature set to keep you protected every time you hit the trails. Top of that list is the Mips Air Node protection system, a Low Friction Layer for fully ventilated lightweight helmets designed to