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Large 113mm x 105mm x 18mm platform
Features a 15-tooth upper and 19-tooth lower aluminum pulley wheels with Grade 3 Silicon Nitride balls to provide absolute optimization of the rear derailleur
}SRAM v2 X
Accepts toe clips
The wheel must be built with the supplied PHR washers and Pro Head nipples
XLAB Aero TT Water Bottle and Cage System: Stealth Black Cage and Bottle ModelNumber=J1972 Large 113mm x 105mm xXLAB Aero TT Water Bottle and Cage System: Stealth Black Cage and Bottle. The Aero TT System offers 50% less drag than round bottles saving up to one minute in an Ironman and up to 20 seconds off of a 40km TT Tri. 20oz BPA free water bottle with easy grip texture and groove Bottle is held securely to the XLAB Hi Grip Deep Pocket cage Total System Weight: 119g TECH SPECS Color Black Bottle Type Standard Access Style Top Mount Type Bolt On Material