Some double-decker bridges only use one level for street traffic ; the Washington Avenue Bridge in Minneapolis reserves its lower level for automobile traffic and its upper level for pedestrian and bicycle traffic ( predominantly students at the University of Minnesota ).

Some bicycle parts, particularly hub-based gearing systems, are complex, and many cyclists prefer to leave maintenance and repairs to professional bicycle mechanics.

Some bicycle activists ( including some traffic management advisers ) seek the construction of segregated cycle facilities for journeys of all lengths.

Some bicycle clubs and national associations became prominent advocates for improvements to roads and highways.

Some bicycle paths are marked on some roadways, and very few separated paths are available to cyclists.

Some sources use the term to mean racing bicycle.

Some recumbent bicycle designs use longer frames than conventional bicycles.

Some bicycle mechanics may be reluctant to work on " nonstandard " bicycle designs.

Some distinguished writers have combined cycling with travel writing including Dervla Murphy, whose made her first documented journey in 1963 from London to India on a single speed bicycle with little more than a revolver and a change of underwear.

Some manufacturers also make bicycle cranks that can be adjusted to different lengths.

Some past sports that are no longer in competition include bicycle racing, Indian club juggling, wrestling, archery, and field hockey.

Some other events that would not normally be at a track and field meet today, were lawn tennis, wrestling, Indian club swing, horizontal and parallel bar performing, bicycle racing, sparring, and tug-of-war.

Some examples of bicycle lighting take advantage of the bottle cage by using it to hold a bottle-shaped battery to power the lights.

Some applications such as lawn mower throttles, automobile manual chokes, and some bicycle shifting systems require significant pushing ability and so use a cable with a solid inner wire.

Some experts suggest that many of these changes began during the earlier Golden age of the bicycle, from 1880 — 1915.

Some of the roads, however, are narrow which can lead to occasional traffic and bicycle congestion.

Some of the other sports included bicycle racing, professional boxing and tennis.

Some cities even decide to fund a public bicycle sharing system, despite the low attendances recorded.

Some racing bicycles, however, have a top tube that slopes down towards the rear of the bicycle ; the " compact " frame geometry was popularized by Giant.

Some modern racing bicycle helmets have a long tapering back end for streamlining.

Some road racing and club cyclists used a fixed-gear bicycle for training during the winter months, generally using a relatively low gear ratio, believed to help develop a good pedalling style.

Some consider that the enforced fast spin when descending increases suppleness or flexibility, which is said to improve pedalling performance on any type of bicycle ; however the performance boost is negligible compared to the benefits of riding a free wheel.

Some hydropower systems such as water wheels can draw power from the flow of a body of water without necessarily changing its height.

Some types of anti-personnel mines can also damage the tracks or wheels of armored vehicles.

Some are keyboard-only controllers, though many include other real-time controllers such as sliders, knobs, and wheels.

Some models were equipped with the $ 1000 optional premium package on the Forester S, including monotone paint ( Sedona Red Pearl ), power moonroof, front side-impact airbags, and gold accent wheels.

Some of the standard equipment found on the 2. 5X include Subaru's VDC ( Vehicle Dynamics Control ), 16 inch steel wheels, and an auxiliary audio jack for MP3 players.

Some trailers have 2 axles which have twin wheels on each axle ; other trailers have 3 axles, of which 1 axle can be a TAG axle which has super-single wheels.

Some people prefer wheels.

Some ABS calibrations reduce this problem by slowing the cycling time, thus letting the wheels repeatedly briefly lock and unlock.

Some types of alloy wheels and brake arrangements will provide enough open space to view the pads without removing the wheel.

Some castle wheels are even made to fold up small enough that they fit in carry-on luggage at the airport.

Some four-wheel drive tractors have the standard " two large, two small " configuration typical of smaller tractors, while some have four large, powered wheels.

Some simple vehicle designs, such as lesiure go-karts, may have a single driven wheel where the drive axle is a split axle with only one of the two shafts driven by the engine, or else have both wheels connected to one shaft without a differential ( kart racing ).

Some first decade of the 21st century-era scooter trikes such as the Piaggio MP3 are reverse trikes, with two wheels in front and one in the back.

Some of the largest and most modern Ferris wheels have cars mounted on the outside of the rim, and electric motors to independently rotate each car to keep it upright.

Some trolleys have magnetic locking wheels.

Some facilities are being designed using desiccant wheels with gas fired heater to dry out the wheel enough to get the required dew points.

Some small internal combustion engines specifically contain special plastic flinger wheels which randomly scatter oil around the interior of the mechanism.

Some detail styling changes were made in 1990, when the dashboard styling was freshened up, the front was given clear-lensed indicators, the rear given smoked rear lamp lenses, the steering wheel redesigned and a new front grille was added, together with fuel injection as standard, 15-inch wheels and rear disc brakes.

Some special noted features for all Infini series are: infini logo on the back, upgraded suspension, upgraded ECU, higher horsepower, lightened weight, 15-inch BBS aluminum alloy wheels, Infini logo steering wheel, aero bumper kits, bronze colored window glass, floor bar on the passenger side, aluminum bonnet with scoop, flare and holder.

Some resorts had wooden rails into the water for the wheels to roll on ; a few had bathing machines pulled in and out by cables propelled by a steam engine.

Some suitcases that include a telescopic handle and wheels are known as trolley cases.

Some amphibians are fitted with reinforced keels which act as skiis, allowing them to land on snow or ice with their wheels up and are dubbed tri-phibians.

Some non-amphibious seaplanes may be mistaken for amphibians ( such as the Shin Meiwa PS-1 ) which carry their own beaching gear-usually this is a wheeled dolly or temporary set of wheels used to move a flying boat or floatplane from the water and allow it to be moved around on land but can also appear as a conventional undercarriage.

Some machines with limited speed ranges or fixed engine speeds, such as some forklifts and lawn mowers, only use a torque converter to provide a variable gearing of the engine to the wheels.