the difference is that one goes on a bike and the other goes on a dirt bike, the second reason is that one is smaller than the other one to
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 rear tire tube on a 70cc baja dirt bike is 3.0-12
motor cross is faster
Most vin numbers are located on the right side if the head tube.
Mountain bike helmets are better than dirt bike helmets
The size or displacement of the engine, 50cc versus 125cc.
On most bikes, it is located on the steering head tube.
Bicycles are powered by legs, however dirt bikes have gasoline powered motor!
A pit bike is a very small bike that is more to like mess around with in the pits hint hint and a regular dirt bike is alot larger more for trial riding or racing.
Google "how to replace dirt bike tires" or look at forums at thumper talk http://www.thumpertalk.com/forum/showthread.php?t=390735
Most bikes the vin is on the steering head tube.
A rocket is cooler:)