Fitting twistshifters

SRAM make three different types of shifter. Attack shifters are designed for a 1:2 actuation ratio, and so are compatible with Shimano rear derailleurs. Shifters whose name consists of an x and a number, like x3 and x9, have a 1:1 actuation ratio (so pulling 1mm of cable through the shifter results in the chain moving 1mm to the side) and are only compatible with SRAM rear derailleurs with the same naming scheme. SRAM XX shifters are only compatible with SRAM XX rear derailleurs and SRAM road rear derailleurs like the Rival, Red and Force models.

Fresh twistshifters aren’t difficult to fit, especially as new ones come complete with a cable already installed. Keep this coiled up until you’ve installed the shifter on the handlebar and are ready to slide the cable into its outer casing. This stops it from dragging on the ground, picking up dirt. As you’re installing the shifters, avoid kinking the cable as it enters the barrel-adjuster. It’s a vulnerable point until you’ve supported the cable by sliding it through the outer casing. Remove any bar ends and plugs. Then remove the short section of static grip – the section that stays still when you change gear. If you are replacing it, simply cut it off. Slide in a chopstick or similar instrument gently between the grip and the bar, without scratching…

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