If your chain is coming off at the rear, it’s often a simple matter of adjusting the limit screws on your rear derailleur. If the chain is coming off the inside of the cassette, put the chain onto the smaller chainring (at the front) and the largest sprocket (at the rear).
Why does my chain keep coming loose?
Chain Not Set Properly
One of the most common reasons why your chain might be coming loose is because it was not set properly. When you go through the steps to tension your chain, you need to finish those steps by setting the tension so it won’t change as you work your saw.
How tight should a chain be on a BMX bike?
The chains of a BMX should be tight enough but not too tight or too loose. It should not sag too much to touch the chainstay. It should be tight enough to allow movement of about one inch up and down. It should not be too tight, or the cranks will get harder to turn.
Why does my bike chain keep slipping?
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. … Shift down into the smallest ring in the rear cassette again, and press your shifter again to see if the bike shifts properly.
How do I tighten my bike chain?
To tighten the chain on a fixed-gear bike, start by flipping the bike over or placing it on a bike stand. Loosen the rear axle and then pull back on the rear tire to make the chain tighter. Make sure the chain isn’t too tight or too loose, then tighten the rear tire again.
Will a loose chain cause loss of power?
A tight chain and a loose chain will both lead to problems. A tight chain will increase friction on the chain and sprockets, leading to greater power loss in the drive train and excessive wear.
What happens when bike chain is 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.
How often should you tighten motorcycle chain?
Too tight is as bad as too loose, but it’ll only take minutes to get it right. You should check and adjust your chain every 500 miles (805 km), and more often for a dirt bike. It’s also a great time to look for kinks or rust, and to give your chain a quick cleaning and lubrication, too.
What causes tight spots in BMX chain?
Un-even chain tension is usually down to one of 3 things. Your front sprocket isn’t quite central. Your rear sprocket isn’t quite central. Your chain is stretched unevenly.
How much slack is in a BMX chain?
You want about 1/2″ vertical deflection in the chain. Too loose it can bounce off the sprocket or chainring, too tight & it will wear almost every moving part of the bike out very quickly.
Why does my bike chain click?
How to Fix a Clicking Chain. A clicking noise often comes from your chain wanting to jump up or down a gear on the rear cassette. This can typically be fixed by adjusting the tension of the cable that runs from your shifter to your rear derailleur. … The clicking could be caused by a bent derailleur hanger.
Why does my bike click when I pedal?
A bent derailleur hanger, or one that is out of alignment, can cause a constant clicking sound while pedaling. The derailleur hanger might be visibly bent or off if it’s bad enough. … Sometimes a creaking noise can occur from the derailleur hanger rubbing against the frame where it’s mounted.