Bar ends attach to a mountain bike's handlebars and will help you distribute your weight evenly on both tires when going up hill. They also allow the rider to bend further to avoid wind resistance. The bar ends should be adjusted to at about 60-80 degrees out from the frame.

2torial #0429: Learn2 Adjust a Bicycle (To Fit You) - Continued Adjust the seat Almost any part of a bicycle can be adjusted, but the one most often adjusted is the seat: a very slight change can make a great improvement in the fluidity of the bike ride. Generally, most people ride with the seat too low, preventing (near) full leg extension-and making the ride a lot harder. When sitting on the seat with your feet in the low positioned pedal, your leg should be just slightly bent. Adjust the seat in small increments, because even 1/4" will make a difference. Mark the starting point with tape. Don't exceed the maximum safe-height line on the seat post. Otherwise, a bouncy ride could be your eject button. Your seat may have a quick-release, or you may have to use a crescent wrench and pliers on either side in order to loosen. Remember the mantra for screws, "righty-tighty, lefty-loosey." Not as necessary are these two: For the saddle's forward-and-back position, loosen the bolt which is attached to the clamp and slide the saddle. This could be a good last-ditch fixer for a bike of the wrong size. For the saddle's tilt, loosen the same nut as above and adjust according to the notches. Step 2