A squeaking part in or on the bike does not bode well. Especially as it is extremely disruptive to what is often a quiet ride. Unfortunately, almost any part can trigger the noise on the bike. Localising them is one thing. Fixing them is another. However, both can be done quickly once you know what to do. How to check the drivetrain and bottom bracket, here using the road bike as an example.
Bicycle noises: How to check the drivetrain and bottom bracket
If the cracking occurs when pedalling while sitting or standing, but not when rolling, then the cause is usually in the drive unit. Unfortunately, this is often the case, as there are many moving parts, but the search is correspondingly difficult. Turn the crank without the chain to check for possible bearing damage. If the bearing runs smoothly, it is best to proceed from the outside inwards.
>> An overview of the search for noise sources can be found here: Noise on your bike: how it occurs & how to fix it
Checking the screw connections
The first tip is relatively simple, but often effective: mist the area around the front derailleur, cranks and chainrings with spray wax. After some time, check the tightening torques of all screw connections and retighten if necessary. Is it quiet for a while, but the noise comes back? Then it helps to clean the crank mount, chainring bolts and the contact surfaces of the chainrings and apply a thin layer of grease.
Noises on the bike: squeaking pedals
If it continues to crack, unscrew the pedals, clean and grease the threads. The pedal bearings are also a possibility: if possible, try other pedals first before dismantling the bottom bracket. Creaking cleats can be stabilised with a little silicone spray.
Last option: Remove the bottom bracket
Once you have ruled out the chainrings, crank mount and pedals as the source of the annoying noises, check the sprocket set and axles first. If nothing helps, remove the bottom bracket. Clean the threads thoroughly and apply a thin layer of grease. Pressed bearings are best replaced immediately and fitted with grease. If the bearing seats are already widened, gluing with Loctite can help.
Other causes of noise on the bike
More topics
Jens Klötzer
Editor
