The Delta Sonic XL allows for a rear seat position and is 0.8" longer than the standard Delta Sonic. Working closely with Cervélo and their wind tunnel testing results, XLAB developed an aerodynamic single rear system specific to Ritchey clamp seat posts with a 10mm horizontal rear hole.
Delta Sonic XL Rod, Gorilla XT Cage, All hardware and installation instructions
• Material: Stainless Steel Rod, Carbon Fibre Cage
• Weight: 156g (rod + cage)
• Aerodynamic Design: The Delta Sonic XL allows the bottle to be close to the saddle, hiding in the rider’s draft and provides clean air flow
• Reliable and Customizable: The Delta Sonic XL fits snug into the seat post providing a sturdy non-sway bottle mount, for fast and safe access to your bottle
• The rod can slide along the seat post for the best customized fit for you. XLAB recommends a 1" insertion minimum into the seatpost
• Compatibility: Cervelo P5 & 2013 P3, Scott Plasma, Kestrel 4000, Fuji D6 & Norcom, BH Aero