The Chase RSP 3.0 / 4.0 / 5.0 Alloy Race Frames come exclusively with the Aero System Seat Tube and require the Elevn Aero Seat Post Clamp Q/R (Quick Release). With BMX races being won by a fraction of a second, we looked on how we could help give the rider one more advantage with the new frames. Our championship winning geometry and proprietary Hydroformed tubes have helped racers all over the world, so this would be a tough task.

So when it came time to make it better, we looked at every tube on the frame to see where we could make a improvement, while keeping the integrity of the frame the same, and making sure any change would be 100% functional. We found such an advantage. Looking to gain a slight aerodynamic advantage, we zoned in on the aero design of many Road bike and Time Trial frames.

The RSP 3.0 frames onwards accept an Aero seat post clamp and seat post only. Eleven offers a Pivotal Aero seat post and seat post clamp, both sold separately and available here at LUXBMX. A fully thought out integrated race system from Chase. 

Update - The 27.2mm Elevn Aero seat post clamp also fits the Chase ACT 1.2 carbon frame series.