The Shimano SIS shifter, also known as the Shimano Integrated System, houses the brake and shifter lever in one unit. These devices are found on road bicycles, typically on the drop bars seen on this style of bike. Setting up a SIS shifter requires pushing the levers to your comfort-position and making sure the seven-speed shifter moves the chain through the seven-toothed gears on the rear cassette.
Loosen the SIS shifter levers on the handlebars by turning the attachment screws at the metal holding sleeve of the right-hand side of the handlebar. Use the Allen wrench to loosen the screws.
Sit on the bicycle and put your hands on the drop bars in your riding position. Feel if the SIS shifter lever is too far left or right for your grip and hand and push it to the desired position.
Tighten the screws on the metal holding sleeve to lock the SIS shifter into place.
Put the bicycle in the work stand. Turn the pedals with one hand and push the SIS shifter to the inside of the bike frame with the other. Watch the chain move through the seven-toothed gears in the rear, centre tire. Make sure the chain shifts onto each gear as you push the SIS shifter.
Turn the barrel adjuster on the bottom of the SIS shifter, where the cable connects to the shifter, one-quarter turn to the left or right to either tighten the shifting if there is missed shifts, or to the left to loosen the chain if the shifts are sloppy or require added pushing in the SIS shifter lever.
Things you need
- Allen wrenches
- Bicycle work stand