A true race bike is probably lighter, and may have another brake set up than a "normal" BMX. also you might have different parts that make the bike itself heavier, like if you are comparing a street or dirt bike to a race bike the back rim on the street/dirt bike the axle is going to 14mm instead of 3/8 axle, but other than that theres really nothing but gearing
No, a dirt bike is an off road motorcycle while a BMX is a bicycle set up for Bicycle Motocross
Yes
it matters what you are going to use it for
the things on both sids of each tire on a trick bike or bmx bike are called pegs
inox or chain lube from a bike shop
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.
No. The Verde Theory is a BMX bike for riding on a track. A Gyro would only come on a Freestyle bike made for trick riding.
no. the can be any brand
There are two measurements to a chain, width and length. Most BMX use what's known as an 1/8" chain. Length, sometimes given in no of links will vary from bike to bike. If two otherwise identical bikes are set up with different sprockets and drivers they will need different chain lengths. Bike chains are always sold too long, and then cut to size. On top of that chains stretch, so the same number of links in a worn chain won't be the same as that number of links from a new chain.
Yes, because as an bmx rider i aslo do trick ridding and we do need pedal brakes
It depends on the length of the chainstays on your frame.
No. Some BMX chainrings have the same 4/5 bolt pattern as road bikes, but most use another method of attachment to the crank. If it is a 4/5 bolt chainring you first have to measure the bolt circle diameter to see how that fits. I'll post a link on that. Next is the thickness of the chain rings. BMXes are single-speed and use a thicker chain. Most road bikes have external gears and need a thinner, more flexible chain to work. I'm not sure if a road bike chain will fit on a BMX chainring. (Unless it's a single-speed road bike of course. Then you can run a BMX-style chain and all can be made to work.)
you can find a BMX bike in halfords
The bmx thruster rampage bike is a exellent bike