- 1). Set the bike in a work stand or on its kickstand so it will not fall over while you are working.
- 2). Use compressed air to remove the handlebar grips of the bike by spraying the air between each grip and the handlebar. The air should loosen the grips enough that they slide off.
- 3). Loosen the cable stop bolts on both the front and rear derailleur until the cables move freely beneath them. Your derailleurs may use a 4- or 5-millimeter hex bolt, or an 8- to 10-millimeter metric bolt. If applicable, use cable cutters to remove any cable end caps from the derailleur cables.
- 4). Loosen the shifter clamp bolts on the handlebar using a 4- or 5-millimeter hex wrench. Slide the shifters off the ends of the handlebars, pulling the cables out of the housing with them. Slide the new shifters onto the handlebars and tighten the clamp bolts.
- 5). Thread the left shifter cable into the housing for the front derailleur cable. When the cable emerges from the housing at the derailleur, pull the cable tight through the cable stop with your hand and tighten the cable stop. Cut off any excess cable using cable cutters.
- 6). Thread the right shifter cable into the housing for the rear derailleur cable. When the cable emerges from the housing at the derailleur, pull the cable tight through the cable stop with your hand and tighten the cable stop. Cut off any excess cable using cable cutters.
- 7). Slide the handlebar grips back onto the handlebars and take the bike for a test ride. While riding, shift through each gear on both shifters to be sure that they are working correctly. Make any necessary adjustments by tightening (to make shifting more responsive) or loosening (to make shifts slower) the barrel adjuster on each shifter.
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