When it comes to ultimate efficiency and top-tier aerodynamics, the AERO System stands unparalleled! Featuring a precise 14-Tooth / 18-Tooth pulley wheel combination, our AERO System leads the market in strength, durability, performance, and aerodynamics. Say goodbye to compromises—our system reduces drivetrain friction and enhances aerodynamics without sacrificing durability, shifting performance, or aesthetics. Unlike competitors' nylon plastic "composite" cages, SLF Motion Oversize Systems are crafted from 100% real carbon fiber made in the USA, with unique coated bearings for enhanced durability and performance. Upgrade your drivetrain or outperform other oversize systems with the SLF Motion AERO System, proudly designed, tested, and hand-built in Pawnee, Illinois, USA.
Part number: AS-921 Barcode: 611834969236, 611834969212, 611834969168, 611834969144, 611834969151, 611834969205, 611834969229, 611834969199, 611834969182, 611834969175 Product code: SLF DC AS 921