SRAM EX1 Chain Gap Adjustment Gauge

Looking for a SRAM EX1 chain gap gauge to adjust your rear derailleur without trial and error? This plastic gauge rests on the derailleur's upper pulley and helps you set the correct distance between the teeth of the largest sprocket and the template. It is designed for riders who tune their own rear derailleur.

Adjustment is made by turning the B-adjustment screw until the longest teeth of the largest sprocket align with the outline of the template. The pack contains a single gauge. Before buying, check the technical specifications to ensure your rear derailleur is listed, as compatibility must match your system.

Founded in Chicago in 1987 by Stan Day and a group of cycling enthusiasts, SRAM is still based in the US city today. It makes drivetrains and brakes for road, gravel and mountain bikes. Its story began with a single product: Grip Shift, the shifter that lets riders change gear by twisting the grip.