You start off with a light frame, then you get a light fork, light wheels, light tires, light bars, light seat post, and light cranks.
To get a light bike, you really have to use light parts through and through, and it's cheaper to buy a light bike already to start with than to lighten a heavy bike piece by piece.
One good way to make your bike lighter is to take your rims and drill holes between all of the spokes. Although it does not make a huge difference, it definitely helps.
A street bike is a type of BMX bike, so your question can't be answered.
There's no telling. The BMX is probably smaller, so it should be lighter. OTOH they're often amazingly chunkily built and can be surprisingly heavy.
Yes
The BMX bikes that you buy at Target and or Walmart are not the same BMX bikes that are used in BMX Racing and BMX Freestyle. Real BMX bikes are lighter, they have diiferent size sprockets among many other things. Feel free to google the National Bicycle League or the American Bicycle League to get more information.
yes they do
As a general rule if two bikes are in the same price range, the smaller of the two will be lighter. This because there is less material used in the smaller BMX due to it's much simpler construction. But, when you head for the high end, a flatland or racing bike is going to be much lighter compared to a mountain bike.
all in all x-rated frames are lighter but it really depends on the frame
Fit street 2 b.c lighter frame but i wouldn't recommend getting a Free Agent Crown Imperial
redline
The Black Eye Renegade is a much better bike. It is lighter and more durable.
build
To make the wheels spin easily.