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A dedicated 1x rear derailleur
5% larger vertical field of view
}The lightest of the Marathon family
} Lightweight 6061 aluminum crossbar mounts to aero bar extensions Positions bottle cage in the most aerodynamic position Easily and securely attaches to extensions up to 130 mm in width Includes 4 Velcro straps
Propel Advanced Pro Frameset Size:XS A dedicated 1x rear derailleurAdvanced grade composite aero race frameset with aerodynamic tube shaping optimized through CFD and wind tunnel data. Features OverDrive Aero steerer system with internally routed cables, 12x142mm thru axle disc brake compatibility, and tubeless ready design. Available in multiple sizes with professional assembly and fitting included. Color Stealth Chrome
