The World's Largest Online Bike Store
    • XLab Carbon Sonic Rear Mount System

        • $115.99 115.99
        • RRP $140.49
        • Save 17%
    • Select Colour

XLab Carbon Sonic Rear Mount System

After the successful and very popular Sonic Wing, many triathletes and dealers asked when we were going to bring out a Carbon version? We were already working on it but we wanted it to be the very best in the World.

By the World’s best we mean the lightest, the most positions, the most customizable with options, best engineered and tested, and of course the fastest! “You won’t want to be seen without it. Because without it you won’t be seen”.

World’s Most Versatile Rear Mount System - The Carbon Sonic has a choice of 3 different angles when attaching to the seatpost. The cages have a forward lowest drag position which sets the bottles close to the seat, or a position 1inch (25mm) further back for triathletes that like to sit off the back of the saddle when climbing.

There also a variety of bottle cage angles. To add to the fun, you can even invert the carrier for a further 15 positions if you like. The Carbon Sonic comes complete with it’s own CO2 and Inflator holder, known as the Sonic Nut.

Compatible: Saddle Compatible, because the carrier fits on the seatpost we have not discovered any seats that you cannot use including the long Fizik, ISM, SMP, Selle Italia, Selle San Marco, Terry and others.

XLab Carbon Sonic Rear Mount System - World’s lightest:

  • The chassis only weighs a miniscule 49 grams. It is made of aircraft grade High Modulus Carbon Fiber.
  • The screws for the bottle cages and the mounting screws to attach to the seatpost are all Titanium.
  • We only use 6AL-4V grade 5 Titanium as it has a tremendous Tensile Strength of 130 Ksi.
  • The Carbon Sonic weighs in at 28 grams lighter than the alloy Sonic Wing.

World’s fastest - Located in the position XLab has determined over a period of 16 years of testing in the Wind Tunnel and by Pros to be the fastest, you can rest assured you have the fastest 48oz Hydration and Storage system on the planet….and don’t forget XLab has been on the winning bike for 13 of the last 16 Ironman distance World Championships!

2 Years Warranty - Because of our engineering in this product we give it a 2 Years Warranty to the original owner.

*Please note: Carbon Sonic Rear mount – Gorilla cages, Mini tire bag, strobe and C02 inflators all optional extras. Optional extras are not included and must be purchased separately.

*Please note: Only compatible with the Cervelo P2C’s, P3C’s and the P4C’s.

Buy XLab Carbon Sonic Rear Mount System from Chain Reaction Cycles, the worlds largest online bicycle store.

  • Delivery costFREE
  • Delivers toUnited States of America
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or fitted.

    More information on returns
  • Pay by Bank Transfer, PayPal or Card


  • Colour: Carbon

Water Bottle Cages Buying Guide

  • We've got everything you need to know in our buying guide.