Bikes, motorcycles and scooters

The rubber tube inside a bike tire that holds the air.

The rubber that wraps the outside of the wheel, with the size (such as 700x25c) printed on the sidewall.

The chain that carries pedaling force to the rear wheel. If it keeps coming off, derailleur adjustment or worn chainrings can also be the cause, so measure the wear and find the cause before replacing it.

A link that joins the two ends of a chain. Depending on the product it may need a special tool and may or may not be reusable. If the chain has snapped, check how far the damage and wear go first.

The friction material that presses on the rim or disc to stop the bike. Noise or weak braking can also come from contamination or adjustment, so diagnose first and then replace.

The steel inner wire and outer housing that connect the lever to the caliper on cable brakes. Shift housing must not be used in its place. If the lever pulls all the way in, also check the adjustment and pad wear.

The thin steel inner wire and outer housing that connect the shifter to the derailleur.

The part you push with your foot. The left and right pedals thread in opposite directions.

The seat of the bicycle. If it hurts to sit on, also check the height, angle and your riding position.

A collar that tightens the seatpost in the frame to hold it in place.

The rubber grips that slide onto the ends of the handlebar for your hands.

A support leg that holds the bike upright when parked.

A cover over the wheel that keeps muddy water from spraying up. If it touches the wheel, stop riding and adjust it before thinking about a replacement.

A pump for putting air in tires; it needs a head that matches your valve type. Inflate to the range allowed for the tire and rim, not to the pump's maximum pressure.

A lubricant for bicycle chains. It helps with light surface rust, but a badly rusted or seized chain should be inspected and replaced.

A holder that screws onto the frame to carry a water bottle.

A lock for securing a bike to a post. If you have lost the key, getting a locked lock open is a separate job.

A mirror mounted on the handlebar for seeing behind you. If it keeps turning, first check whether the mount has come loose.

The rubber hand grips on both ends of a motorcycle handlebar.

A cover that goes over the whole motorcycle to keep off rain and dust.

A luggage box mounted on the back of a motorcycle.

A clear shield mounted at the front of a motorcycle to block the wind.

The clear shield on the front of a helmet. If the mount broke on the helmet side, replacing the visor alone won't fix it. Use a clear visor at night.

The heavy chain that carries engine power to the rear wheel.

The friction material that brings a motorcycle to a stop.

The rubber tire on an electric scooter wheel; sizes (such as 8.5 inch) vary, and some use tubes and some don't. A flat can also be a tube or valve problem.

The cover over the scooter's rear wheel. On some models it also works as the rear brake.

The rubber hand grips on a scooter handlebar.

A rough tape stuck on the scooter deck to keep your feet from slipping. It can't fully prevent slipping in the rain, so avoid riding on wet roads.

The rechargeable battery pack that powers the scooter.

The dedicated adapter that charges the scooter battery. Don't use just any charger because the plug happens to fit.