It is important that you take the time to inspect the condition of your gears and chain before any ride.
Fixed gear bike chain slipping.
Using a chain tool slip each of its ends through the links of your chain and check your chain against its wear indicators.
If the chain is worn out.
How to fix bike chain skipping slipping jumping gears i show the most common causes for chains that skip slip jump gears while pedaling auto shifting phantom shifting derailleur especially while under torque like climbing up a hill or standing on the pedals.
Place your bike in a stand.
Note which gear these are on so you can place the chain back in the right place.
And explain what needs to be done to fix them.
To fix a slipped bike chain first turn your bike upside down as this will make it a lot easier to reattach the chain.
I show the most common causes for chains that skip slip jump gears while pedaling auto shifting phantom shifting derailleur especially while under torqu.
Hub or fixed gear bike.
Straightening a bent derailleur hanger how.
Bicycle gear slips will cause inconsistencies while riding as well as slow down a racer.
A chain that keeps falling off is either too loose in the case of a hub gear or fixed gear bike or the derailleurs are badly adjusted and move the chain right off the cogs when you change gears.
To fix a skip in the rear derailleur shift your chain into the smallest ring on your rear cassette the hardest gear and the middle or larger ring on your front derailleur.
To tighten a loose chain on a hub or fixed gear bike first use a wrench to loosen the axle nuts on the rear wheel.
Once your bike is upside down look at the derailleurs which are the small machines on the front and back gears that move the chain.
This will allow you to clearly access all the parts and spin the pedals to see how the drivetrain is performing.