wheels/rims, and tires are chosen for strength, safety, and durability rather than high performance. Additionally, utility bikes tend to incorporate fewer technological advances in material design and engineering in comparison to road bicycles, though there are exceptions. In particular, the small-tired Moulton portable utility cycles incorporate advanced engineering with slightly lighter weight. Most utility bikes feature an upright riding position. The handlebars are almost always curved back and positioned higher than the saddle so that the rider can operate controls without changing their riding posture. The saddle is also place right above the rear wheel axle instead of the bottom bracket, which makes it more difficult to pedal. Some people add a child seat or a trailer. The utility bike's combination of parts, design, and features provide functionality and (short-distance)comfort at the expense of weight, an adequate compromise when used as originally intended (local commuting and short rides). Stadsfiets as a defining term The Dutch has the full set of features commonly incorporated into a utility bicycle. The Dutch words and mean 'bicycle' and 'city bicycle', respectively. A is considered to be a fully outfitted European city bike, distinguished by the following typical features: upright riding position, fully enclosed chaincase, skirtguard, O-lock, hub gearing, dynamo hub, manually operated small warning bell, and built-in lights. German and Dutch versions of the European city bike are similar, though there are differences. The English roadster is similar in design, appearance, and intended use. The primary differences are that the continental bicycles tend to have a higher handlebar position for a more upright riding posture, and are more likely to have rod-actuated drum brakes. Because of Great Britain's cultural and trading influence in its former colonies, the roadster can still be seen in local production and use in many countries of the world. Traditional vs. contemporary design A traditional-styled European city bike includes a frame made of low-carbon high-tensile steel, black paint with chromed accessories, an opaque skirtguard, bottle dynamo, simple dynamo-powered lights, and either a single-speed or 3-speed internally geared hub. Contemporary city bikes are increasingly found in many European cities, including Amsterdam and Copenhagen. Dutch and Danish-made city bikes often include such features as a clear skirt guard, colors other than black, aluminum alloy or chromoly steel frame, front suspension fork, suspension seatpost, Hub dynamo, dynamo lighting with motion-and-darkness detection, magnetic lights, a 7- or 8-speed hub, adjustable kickstand, child seats, and