Yes it is for transportation and it keeps you fit.
bicycle
Brakes are meant to have a lot of friction and it's useful.
The bicycle.
in hiking and bike racing
The brakes! And the tires (no friction = no traction).
No. It's not useful when you're destination is 10 hours away IN A CAR. it's also not useful when you're trying to unlock or lock a door.
Because it looked fun and useful, so they brought some.
The "bi" in bicycle means two. If it had one it would be a unicycle which is harder to ride and not as useful. If it had three it would be a tricycle and not handle as well.
One can buy high pressure bicycle pumps online. Some of the useful websites are Amazon, eBay, Lezyne, Halfords, Blue Sky Cycling, Sears and Bicycle store.
Racing because friction slows you down but you need to go fast.
It gives you a nice, low-impact aerobic exercise, and allows you to travel useful distances w/o contributing to pollution.
The Kona serial number is important when purchasing a new bicycle because it serves as a unique identifier for the bike. This number can help in registering the bike for warranty purposes, tracking ownership in case of theft, and verifying the authenticity of the bicycle. It is also useful for insurance purposes and can assist in recovering a stolen bike.