If the bicycle has external gears (several visible sprockets that the chain can run over) then you get the number of "speeds" by multiplying the number of sprockets by the pedals with the number of sprockets at the rear wheel. Most common for a half-decent MTB would be 3x9 = 27 speeds.
In reality this isn't entirely true, some of those combos will give the same gear ratios, and some shouldn't be used due to the chain running at an extreme angle. So in practical terms a 27-speed bike will give something like 15-18 usefully different gears.
Because at higher speeds, the wheels begin acting as gyroscopes, helping to keep the bike steady.
the answer is 8.you have 8 choices to chose from
A bullet bike is a form of ninja bike that can reach unreal speeds. It is known as a "bullet" because it can reach one of the highest speeds a motorcycle could ever even possibly reach.
The 110cc pit bike normally can travel up to speeds of 45 mph, and even has hit speeds reaching 55 mph. The speed is really determined by the driver of the bike and weather conditions.
depends on the speeds and weights of the involved vehicles.
Depends on the make and model of the bike. Some motocross bikes have 4 gears while most of the cross country thumpers are 5 or 6 speeds.
Thin wheels alone isn't enough to identify the bike type. Can be a road bike, bike, a track bike, a TT bike. Even fixies and single-speeds can have thin wheels.
Two, but this is not the same as how many speeds the BMX bike in question has. A BMX bike has a sprocket in the front, and a cog in the back and each is a gear, but is considered a single speed bicycle because two gears and a chain are required for transmission of rotational force from the crankset to the rear wheel.
Cruisers are usually single-speeds, but can be fitted with either internal gear hubs or derailer gear hubs. Usually 3-5 speed IGHs or 6-7 speeds derailer gears.
A Downhill Bike!
I'm assuming by "shifting speeds" you mean when the manufacturer recommend you select the next gear. This will vary from bike to bike depending on the engine, transmission, and final drive ratios. You would find the information for your specific motorcycle in the user manual that came with it.
A 1000 cc sports bike can reach speeds up to 190 miles per hour. Many different makers of motorcycles uses the 1000 engine.