During a professional bike fit, a bike fitter analyzes your body measurements, physical limitations, and riding style to optimize your position on the bike. Video capture is often used to assess pedaling mechanics as well. The fitter will typically adjust components such as saddle height and angle, drop and reach to your handlebars, and may even suggest changes to components such as a different saddle or crank length. A full bike fit can take up to three hours and often includes a follow-up after a few weeks of riding. A quality bike fitter may even offer a money-back guarantee if you're not satisfied with the results.