Wahoo Elemnt Bolt V2 Aero Out-Front Mount Description: Wahoo's patent-pending integrated Aero Out-Front Mount is designed specifically for the Bolt V2 GPS bike computer. Made of durable, lightweight plastic for slicing through the wind and staying out front. It also comes with an optional locking screw that is UCI-compliant for connecting your bike computer to your bike for weigh-ins. Features: Aero design to eke out every advantage possible Works exclusively with the ELEMNT BOLT V2 computer Fits 31.8mm round bars Weighs a minimal 44g