a headlight integrated into the front fork. Newer German models, on the other hand, tend to incorporate a less is more philosophy. Suitability compared to hybrid or commuter bikes The suitability and availability of fully outfitted city bikes depends on multiple factors, including local terrain, city density, car traffic, weather, and bicycle infrastructure. Traditional European city bikes are optimized for short-distance, frequent transportation over flat terrain in urban settings. However, such bikes are also used in hilly Switzerland—although they're an extremely rare sighte there, due to their heavier weight and inefficient geometry—, including Basel and Bern, where 23% and 15% of daily trips are made by bicycle respectively. A fully outfitted European city bike or heavy utility roadster typically weighs 35–50 pounds (16–23 kg), compared with 14–22 pounds (6–10 kg) for the average road racing bike and 22–29 pounds (10–13 kg) for the typical modern mountain bike, touring bicycle, or hybrid city bike, commuter, or cross bike. A steel-frame European city bike with hub gear, chain case, and other features is heavier and more difficult to ride uphill than a road bike. A steel-frame bike is more cumbersome to carry and store, so it might not be the best choice for commuters needing to transport their bicycles on public transportation nor cyclists living or working in upper floor residences. Instead, European city bikes are often locked and stored outside businesses or residences, even during inclement weather. For easier carrying and storage, makers of European city bikes provide features similar to city bikes on folding bicycles. In the Netherlands, many modern city bikes are also available with an aluminum alloy frame, significantly reducing weight to partly overcome the practical difficulties with a heavier bike. In the United States, Americans living in cities or suburbs with many days of sunshine per year have traditionally used road racing bicycles, sport/touring bicycles, or mountain bikes for general commuting or utility purposes. For all-weather use, U.S. buyers tend to purchase substantially lighter machines than the traditional Stadsfiets or utility roadster, instead choosing hybrid city bikes or commuter bikes derived from road or mountain designs. The latter frequently employ lightweight frames and wide gear ranges for use on higher-speed roadways as well as steep terrain. To save weight, some hybrid city or commuter bikes do not usually possess many accessories, adding only fenders, a rack, and perhaps a partial chainguard, as well as front and rear