Sock Guy - Stars & Stripes Valve Extenders Compatible with a wide range

Compatible with a wide range of rim widths

4 sits one tier above the MRX Comp in SRAM's flat bar lineup

Pairs naturally with Pirelli's SmarTUBE for an optimized system weight

The SRAM RED XPLR XG-1391 is the flagship 13-speed gravel cassette

Sock Guy - Stars & Stripes Valve Extenders Compatible with a wide rangeWhat Makes the Sock Guy Stars and Stripes Sock Stand Out? The Sock Guy Stars and Stripes delivers a bold American flag graphic on a black crew sock built with Micro Denier Acrylic soft, breathable, and designed to keep graphics vivid through season after season of riding. The Channel Air construction adds ventilation where you need it most, while the 6 inch cuff stays put without cutting off circulation during long efforts on the road or trail.