Introducing Beta, our rear-mounted bottle carrier. Beta is designed to work on any seatpost with 10mm thru-rail hardware. This includes the Cervelo P2 and P3 (rim brake versions), Scott Plasma 5, and many others

Like all TriRig products, Beta was designed to be beautiful in both its simplicity and its elegant function. Just two M5 button head bolts secure Beta in place, and those same two bolts allow Beta to adjust independently of saddle position. One bottle can be mounted directly behind the saddle, or two bottles can be mounted side-by-side. In either case, total width is kept to a minimum, keeping the bottles in the aero shadow of the rider, resulting in a drag-neutral hydration solution.