The Skyway Tuff Wheel II Mag 20" Wheelset has been the mag wheel of choice of BMX riders since the beginning of BMX for the most part. For the most part these mags are just like they were in the 1980's but with a sealed bearing front hub. These are perfect to finish off your retro build, fix up that old BMX bike or to just look cool. These wheels are a pair (front and rear) and have 3/8" (10mm axles). The rear features a single speed coaster brake setup with an included 16T sprocket.