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Code: 1787-XL
XLab Delta Sonic Rear Mount System
  • The only single bottle carrier compatible with 10mm horizontal hole seatposts!
  • Strong and sturdy mount eliminates rear carrier sway.
  • Gorilla XT Cage has a tight 14lb grip on bottles eliminating unexpected launches.
  • Very adjustable with up to 1.25" of adjustment to ensure carrier sits close to the saddle.
  • 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 10 mm horizontal rear hole.
  • If the saddle is in the rearward position, you may want to look at the Delta Sonic XL.

Aerodynamic Design

  • The Delta Sonic allows the bottle to be close to the saddle, hiding in the rider’s draft and provides clean air flow.

Reliable & Customizable

  • The Delta Sonic fits snug into the seat post providing a sturdy non-sway bottle mount, for fast and safe access to your bottle. The Delta Sonic rod can slide along the seat post for the best customized fit for you. XLAB recommends a 1" insertion minimum into the seatpost.


  • XLab has found these bikes to be compatible with the Delta Sonic.
  • Cervelo P5 & 2013 P3, Scott Plasma, Kestrel 4000, Fuji D6 & Norcom, BH Aero.


  • Delta Sonic Rod.
  • Gorilla XT Cage.
  • All hardware and installation instructions.


  • Rod: Stainless Steel.
  • Cage: Carbon Fibre.


  • Rod 92 grams, Cage 49 grams. Total 141 grams.


  • Rod: 3 Year Warranty.
  • Cage: Lifetime Warranty.
Quality well made product, does exactly what it says on the tin, I have had bottles 'eject 'in the past. After a few rides can`t see that happening with the XLAB.
Awesome bottle mount. They're not kidding when they say its a Gorilla's grip! No bottle launches coming from this dog. Easy installation - highly recommended.