How loose is too loose for a bike chain?
On a derailleurless drivetrain, you should be able to lift the chain about 1/2 inch above its resting position at the middle of the chain above the gears. If the chain is too tight, you might feel and hear binding in the drivetrain as you pedal. If it is too loose, the chain could skip or drop, and you can see it sag.
What happens if chain is too loose?
The major symptoms of a loose chain include chain teeth skipping over the sprockets, uneven transmission of power to the wheel leading to jerky wheel movements, chain lash and the chain slapping the swindle arm, and in the final case, chain coming off the sprocket.
Why does my chain keep falling off?
Chain or components are worn out
Like anything that is used regularly, sometimes parts just get worn out. They may not be damaged from being bent, or hit hard, but it may just be time to replace components. Teeth on your crankset or chainring may be starting to wear, allowing the chain to slip off without meaning to.
Can you tighten bike chain?
You can tighten your bike chain on your own. Keep in mind that the process is different depending on if you ride a single-speed bike or a bike with a derailleur. To tighten the chain on a fixed-gear bike, start by flipping the bike over or placing it on a bike stand.
Why does my bike chain slip when I pedal hard single speed?
Anyway, when you’re pedaling hard, there is tension in the top section of the chain, between the ring teeth and the cog. Under this tension, they stay engaged even if the returning-to-ring section of the chain is sagging.