- 1 How do I adjust my mountain bike derailleur?
- 2 Why is my front derailleur not shifting?
- 3 Should the front derailleur touch the chain?
- 4 Are front derailleurs interchangeable?
- 5 How tight should front derailleur cable be?
- 6 Should I adjust front or rear derailleur first?
- 7 What gear should my bike be in?
How do I adjust my mountain bike 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 front derailleur not shifting?
Common Front Derailleur Problems. Front derailleurs may cause sluggish or inaccurate shifting because (A) the derailleur body is not positioned properly, (B) the derailleur limit screws are not adjusted correctly, (C) the mechanism is dirty or (D) the cable is damaged or improperly tensioned.
Should the front derailleur touch the chain?
A properly adjusted front derailleur should shift the chain between the front chainrings but will not throw the chain off the rings. The basic adjustments for the front derailleur are the height, rotation, limit screws and inner wire tension (index setting). The cable inner wires should also be lubricated.
Are front derailleurs interchangeable?
In addition, front derailleurs are made for either 7, 8, 9 or 10-speed chains, but they can often be used interchangeably. If you are using a different chain than your derailleur was made to work with, the degree of adjustment you can expect will be lower than with a matched set.
How tight should front derailleur cable be?
You need to pull it pretty tight before clamping it to the derailleur. Probably as tight as you can. Usually I find that’s still not tight enough, so I screw the barrel adjuster down all the way before putting the cable in and then open it up until the tension is correct.
Should I adjust front or rear derailleur first?
In a nutshell, adjust the front derailleur first, then the rear. If the derailers just need minor tweaking (they are basically in adjustment but are “not quite right”) then you adjust the one that is obviously wrong, check the overall adjustment again, then again adjust what needs adjusting.
What gear should my bike be in?
When riding uphill or into a headwind, it’s best to use the small or middle front chainring and bigger rear cogs. When riding downhill, it’s best to use the bigger front chainring and a range of the smaller rear cogs.