Don't really know what part you're calling a crossbar, but it's probably what's otherwise known as the top tube. The reason for having a lower top tube is that it makes the bike more manouverable during tricks, jumps and technical riding. The downside is that it's not as efficient for seated riding, which isn't much of an issue for MTBs.
the question is "why don't womens bicycles have crossbars
The original purpose for the design of a "ladies" or "step through" bicycle frame was to allow a lady to ride a bike without the frame hiking her dress up. The frame's top tube was lowered to allow for the material of a dress to hang low enough to cover the riders legs. This design remained through the years because the frame also allowed a rider to mount the saddle more easily.
So, why aren't "men's" or "conventional" bike frames built like this? Primarily because the traditional "double-diamond" frame construction is the most structurally sound and offers the best ride performance.
It has a lower cross bar so that both feet the easily touch the ground
When out of the saddle a bike with a lower cross bar (AKA top tube) can be tilted more sideways w/o your legs getting in the way, which can be useful in trick riding.
Mountain Bike Rally happened in 1994.
A road bike is faster on the road than a mountain bike. That's all
Mountain bike magazines focus on mountain bike tracks, tips and information regarding bikes in general as well as helpful tips about bike parts and repair.
Mountain Bike Rally was created in 1994-11.
Mountain bike shoes are not required to be able to ride a mountain bike. You can wear any good athletic shoe. Wearing an actual mountain bike shoe is helpful however to keep your feet from slipping from the peddles on rugged terrian but it not required in any way.
i believe standing on your crossbar on 1 leg down a small hill is the best and most fun
One of the most popular mountain bike magazine is "Mountain Bike." Other favorites that discuss all types of biking are "Dirt Rag Magazine," and "Bike Magazine."
You can find a mountain bike on the top of mount Chiliad.
Mountain Bike Hall of Fame was created in 1988.
The first mountain bike is build in 1966 in the United Kingdom.
A mountain bike frame is used in the construction of a working mountain bike. The frame is usually the metal tubes or bars that other parts connect into.
A mountain bike is made to be ridden on rough terrain so it has tough, knobby tires; a heavy, strong frame; and shock absorbing features. A street bike is designed to be ridden or smoother surfaces, therefore it has smoother tires, a lighter frame and lower handle bars so you can see hazards more easily.