What to Do When the Gear Shifter Is Stuck?

Although many parts of a bicycle can encounter problems even with regular upkeep and maintenance, the gear shifter is especially prone to trouble. Because of the intricate mechanical makeup of the gear system and the strain that any bike ride places on it, it is often a cause for concern. Knowing how to repair a sticky or broken gear shifter can get you back on the trail or road in no time.

  1. Check Derailleur Limit Screws

    • The part of the gear system that is on the back wheel and that moves the chain onto the rider's choice of cogs on the rear axle is called the derailleur. The derailleur has screws that limit the distance each gear can travel. If the gear cables have the right tension but the gears stick, the limit screws need to be adjusted. Sticking can be caused over time by rough riding or by a blow to the gears.

    Adjust Screws Slightly

    • Shift the chain onto the smallest cog on the rear hub and tweak the limit screw marked with an "L" on them, using a screwdriver. Adjust the screw until the derailleur does not touch the chain. Then, shift the chain to the largest cog and turn the limit screw marked "H" in the same way.

    Check Cables and Cable Housing

    • Any kinks or twists in the shifter cables or the tubes that hold the cables in place can cause gears to stick. If you can't shift gears at all, or only with difficult, check the entirety of the length of the cables and their housing. If there are bends or dents, you might have to replace the cable or housing.

    Angle Adjustment

    • A screw on the back derailleur controls the angle of the derailleur. Over time, the angle adjustment screws can become unscrewed and change the angle, causing the gear shifting to be jerky, uneven and difficult. Loosen or tighten the screw to make sure the derailleur aligns with the largest part of the gear sprocket. Try to shift gears while riding the bike to make sure the adjustment achieved the proper effect.