Fits Quintana Roo PR series and Cervelo models with 2-hole seat posts. What is the SONIC WING? You know those mysterious two holes in a Cervelo or QR PR seatpost? Well, this Carrier will fit in there, a nice tight fit. Consider the CARBON SONIC made of Carbon Fiber for a lighter version. Fastest When installed in the high position, air flows cleanly around the aero seat post. The narrow 5/8" SONIC WING chassis has an open back allowing air to exit. This can save 13 seconds per 40 kilometers when in the high position. Custom Fit Has 30 different positions available, so that you can have a custom fit position that is both comfortable and aerodynamic. Can be inverted for a lower position on the saddle, or keep it upright for a low drag higher position. 3 different carrier angles and 5 different bottle angles for each position. Compatible Because the carrier fits on the seat post we have not discovered any seats that you cannot use including the long Fizik, SMP, Selle Italia, Selle San Marco, Terry and others. For ISM saddles with a transition hook when fitting to Cervélos the saddle works well if you use the Cervélo clamp in the front hole of the seat post. If you have the clamp in the rear hole, it is necessary to invert the XLAB carrier in order to miss the transition hook on the saddles. If you do not wish to invert the carrier to miss an ISM saddle, then select either the XLAB CARBON WING, SUPER WING, TURBO WING or MINI WING SYSTEM. Colors Black, White and Red Includes SONIC WING chassis 1 Pair X-STRAPS Material Aircraft Aluminium Alloy. Steel hardware Weight Aluminum chassis 60 grams, Hardware 35 grams. Straps 9 grams.
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