FOR EVERY RACE: Aluminum race number clamp for installation on the seatpost. For a secure attachment and a neat finish and the perfect solution to eliminate cable ties on your bike frame AERODYNAMIC: Thanks to this seatpost clamb you can secure your race number on your seatpost to make your bike as aerodynamic as possible FOR AERO SHAPED SEATPOSTS: Thanks to the elastic straps and the special design, the AeroFix is perfect for aero shaped seatposts. A rubber protection inside provides extra grip and prevents seatpost damage DURABLE AND STRONG: This racenumber clamb is super lightweight, secure and aerodynamic, all you need to win your next race! The self tapping bolts are great for fast and easy installation PART OF YOUR RIDE: BBB Cycling offers a wide variety of bike repair tools. Tools for on the road for cyclists who suffer from bike damage along the way, and workshop tools for all maintenance before and after your ride