After this, quarter turns will enable you to adjust the derailleur so it doesn’t rub the chain. Keeping pressure on the cable, wind out the screw a half turn at a time until the chain jumps to the biggest ring. Manually pull on the cable to encourage the derailleur to shift into the largest chainring. Shift the rear derailleur into the smallest cog. Kaden Gardener / Our Mediaįinally, we’ll set the high limit of the front derailleur, which stops the chain from overshifting off the chainring. With the chain in the smallest cog on the cassette, it should be as close to the outer plate of the front derailleur without touching. Then, while applying pressure to the derailleur, slowly unwind the limit until the chain jumps onto the biggest cog and runs smoothly.ĭoing it this way means the tolerance of the derailleur’s limit isn’t skewed towards the wrong end of the scale. Set the limit screw so the chain runs in the second largest cog. If the derailleur isn’t new, we recommend an alternative method. While still manually pressing on the derailleur, gently turn the cranks and wind out the low stop screw until the cassette shifts to the biggest cog and isn’t jumping or clicking. Push on the derailleur to manually shift up to the highest gear possible. Locate the lower limit screw, which will usually be marked with an ‘L’. We’ll first set the lower limit screw on the rear derailleur, which prevents the chain from derailing into the spokes. Push the derailleur into the largest cog and adjust the ‘L’ limit screw. Manually guide the chain into the largest cog and adjust the limit screw. How to index the gears on your bikeīefore we get stuck in, we recommend you check the condition of some of your drivetrain components to avoid any frustrations later on.įirst, check that a bent derailleur hanger isn’t to blame for your shifting woes (check our step-by-step guide on how to diagnose and straighten a bent hanger for more info). If you’re not sure where to start, jump to our guide on how to diagnose and fix common shifting problems with your bike gears at the end of this article.Ī silent and smooth-running drivetrain can make all the difference to your ride and fixing your bike’s gears is something that even the most mechanically inexperienced can handle. This is useful if you are setting up a new front or rear derailleur from scratch. We also outline how to set the limit screws on your drivetrain. In this step-by-step guide, we explain how to index your front and rear derailleurs by adjusting cable tension. If the gears on your bike are indexed properly, each single click of the shifter will cause a single shift up or down the gears, front or rear. The dipped handle provides a comfortable and non-slip grip during use and the protective sleeve on the drive end helps keep dirt, grime and other contaminants out of the ratcheting mechanism for longer tool service life.This is also known as indexing your gears. The extended length steel handle grants users added reach and the increased torque necessary to overcome anti-reverse mechanisms. With a deep-reaching 7/16-inch hex head this tool can access adjusters in recessed locations and its built-in ratcheting mechanism provides full 360-degree rotational swing for ease of operation at any angle. The STEELMAN 79434 7/16-Inch XL Automatic Slack Adjuster Wrench is specially designed to aid in the installation and servicing of Haldex® brand air braking systems on heavy-duty / long haul trucks and trailers.
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