How do you tighten a bike chain with a derailleur?
How to adjust a rear derailleur and index your bike’s gears
- Set the limit screws. With the gear cable disconnected, gently pedal forwards until the chain drops onto the smallest sprocket.
- Tighten the cable.
- Adjust the cable tension.
- Shift it up.
- B-tension screw.
Why is my chain rubbing on my derailleur?
The reason the chain rubs is because the cable is too loose. And when it’s too loose, shifting onto the large chainring results in only a partial shift. With sufficient tension on the derailleur cable, the derailleur cage will move to its full outside limit and there will be clearance for the chain – and no rubbing.
Why does my bike chain slip when I pedal hard?
Most of the time, a skipping chain is caused by cable stretch. In the first half dozen rides on a new bike your shift cables stretch the most. They can also stretch over time as you ride. Hippley explains, “It takes cable tension to open a derailleur, which shifts your chain between gears.
How do I adjust the tension on my front derailleur?
Begin with the chain on the smallest cog. Relax the cable tension completely using the cable barrel adjuster. Place a hand on the derailleur body to feel for any lateral motion, and select one screw to turn one full turn clockwise and then counter-clockwise. If you felt motion in the derailleur, this is the “L” screw.
How do you adjust the chain tension on a mountain bike?
Raise the quick-release lever located in the middle of your rear wheel. Slide the wheel axle backward in the rear dropouts to increase the tension of the chain. Push the wheel axle forward in the rear dropouts to decrease the chain tension. Lower the quick-release lever after adjusting your chain tension.