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Chain Tension
The chain endures huge tension forces from pedaling. For optimal shifting
and efficiency, the Chain must connect with the teeth properly.
To check for excessive slack, shift to the smallest gear on the Cassette (if
applicable) to create the greatest amount of slack in the Chain. Chain slack
should be within 10-20 mm per span. This amount of slack is equally
applicable to all internal hub gear chain drives.
Note: Belt drive tension is more complicated and should be serviced by
dealers.
Excessive slack can be caused by a Chain that is worn and stretched. A stretched Chain will not sit properly in the teeth. Over time, gaps
between the teeth of the Sprockets becomes greater, mirroring the shape of the Chain. Replacing a Chain when it is worn will help extend
the life of the most expensive Cassette and Chainring.
For internal gear hubs, excessive slack can also be due to misadjustment of the rear wheel position relative to the dropout.
If you are not sure if the chain slack is from chain wear or wheel misadjustment, take your bike to the dealer for servicing.
Cleaning
When your Tern needs cleaning, use a bucket of water and gently sponge off any accumulated dirt and salt from your bike. Dry your Tern
after cleaning to prevent rusting.
Do not clean your Tern using a pressurized spray or steam because water can be forced into sealed areas and damage your bike.
Brakes
Make sure the Brakes are working with proper stopping power. The Levers should stop short of touching the Handlebar.
Riding with improperly adjusted or worn Brakes is dangerous and can result in injury or death. Check the Brake manufacturer’s
instructions for care and operation of your Brakes. Keep Brake surfaces clean and free from oil or lubricants. Replace worn
Brakes with authorized replacements.
Chain, Cranks, and Cables
A bicycle drivetrain has an Internal (A) or External (B) hub. The drivetrain consists of the Cranks (1), Chainring (2), Rear Sprocket (3) or
Cassette (4), Chain (5), Front Derailleur (6) and Rear Derailleur (7). Bicycle gears are numbered from 1 upwards, with 1 being the lowest and
easiest gear.
The lower gears are used for climbing and the higher ones are for descending. We recommend you practice shifting gears in a safe
location.
To check that your Chain is fully connected with the Chainring, rotate the Cranks and ensure no gaps or kinks are visible.
Before riding, shift through all Gears and make sure the Chain and Derailleurs are fully functional. If your Gears are not shifting smoothly, we
recommend consulting your dealer. If the Rear Derailleur is malfunctioning, do not use the highest and lowest gears of the Rear Cassette
since the Chain or Wheel may get jammed which can cause bicycle damage or rider injury.
Check all control Cables and Housings for rust, kinks, and fraying. They should be replaced if damaged.
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