Find handlebars that are about shoulder width, but no wider that 28 inches. Choose platform pedals that will grip the bottoms of your shoes but still allow you to reposition your feet if needed. Find the right crank-arm length. The most popular length is 175 millimeters. Select tires that grip the track surface and allow for good acceleration and braking.
Many riders use a wider tire in the front than in the rear.
Choose your other components, including frame, fork, wheels, seat and brakes, with weight, strength and price in mind. Use pads on your top tube, stem and handlebar crossbar for protection in case of a crash. Select riding pants that are durable, loose-fitting and comfortable. They should cover and protect your shins and knees. Racing pants called leathers work well because they have built-in pads.