On average, a road bike is faster than a mountain bike by about 25 due to its lighter weight and smoother tires.
On average, a bike is about 3 to 4 times faster than walking.
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.
500$
A good race mountain bike would cost you about $6,000 to $10,000
$75
Anything from $50 to $800
A mountain bike can typically hold up to 300 pounds of weight, including the rider and any additional gear or equipment.
The difference is that the mountain bike tube is much burlier and wider than the dirt jump tube but may not be as strong in terms of hard hitting strength.
The recommended amount of sealant for a mountain bike tire is typically 2-4 ounces per tire.
It weighs about 14 - 16 lbs.
It's about 30x faster.
bore it out to how ever much you want it to be