What are the dimensions of a bicycle?

Answer 1

Cycle tracks can be built indoors or outdoors in a variety of materials and in different sizes. ● New tracks are now constructed based on the metric distance of cycling events: 250m track is 4 laps = 1km 333.333m track is 3 laps = 1km 500m track is 2 laps = 1km ● Smaller tracks are used for indoor training facilities and in multi-purpose stadiums to stage annual spectacular professional Six- Day Race promotions. ● The popular sizes for small tracks are 166.666m (6 laps = 1km) and 200m (5 laps = 1km). For world championships and Olympic Games, the smallest acceptable track is 250m. At national cycling centres where elite representative teams are trained, tracks should ideally be 250m. Indoor tracksVelodromes, such as the Manchester National Cycling Centre, house a track built with a timber surface decking, usually Siberian pine, supported by a timber understructure. Indoor tracks built to host a world championship will be either 250m or 333.333m. It is now considered the norm to build 250m tracks. The popularity of the 250m track stems from the fact that racing on it is more spectacular than on the larger 333.333m track. The design offers better racing lines for cyclists, and spectators feel they are closer to the action on the smaller size track. The 250m track is the better of the two options to build indoors. The overriding advantage of the smaller track is the lower cost of the building to house it and the spectator accommodation. The velodrome building to house a 250m track will require a free span structure of 120m. The height of the building will preclude most urban sites. To gain a perspective of the cost of building a velodrome such as the National Cycling Centre or the Sydney Olympic Velodrome, it is sobering to note that the cost of the 250m timber cycle track - the visual centrepiece of the stadium - can be less than 2% of the total cost of the facility. A 333.333m track requires a much larger building footprint and span. To achieve this, the overall volume of the building increases out of all proportion to the increase in the size of the track. Funding a velodrome with a 333.333m track is prohibitive. The National Cycling Centre is a showcase for international cycling events in Britain. It is unlikely that another velodrome of this size and cost will be built again in the UK unless a British city is in a position to bid for an Olympic Games. There is, however, a need for several indoor cycle tracks to be built as training facilities. The price of these venues can be kept to a minimum with a cost-effective building shell providing a small volume of spectator/educational trackside seating for up to 500 persons. Simple, proven building designs are available. For the national elite training plan, a 250m track is desirable. Where space is limited or a high-profile building is unacceptable to local planning authorities, thereby jeopardising a project in an area of stated importance to British Cycling, then a 200m track is a good compromise for general training and racing. The geometry of the design can be developed to accommodate the desired training programme without any great adjustment to the cyclist's orientation. In the UK climate, indoor tracks are needed for the training of elite national cyclists, but they are also essential to provide all-year-round activity. Schools will be encouraged to place track cycling on the list of recognised school sports, but year-round availability of the venue must be guaranteed. Tracks can be smaller and fill an important role in activity centres. At the Calshot Activities Centre in Hampshire, a track is situated in the restricted area of half an aircraft hangar. The timber track is 142.857m or 7 laps = 1km. The track is part of Hampshire County Council's educational and leisure facility, providing sports facilities for up to 200 school children per week plus evening and weekend adult cycling. A disused airfield hangar or similar shell may be suitable for a training/competition track of 166.666m. Concourse circumference 436m Track circumference 333.333m Track perimeter 373.5m Track width 7m Highest angle 28º Lowest angle 5.5º Figure 2 Velodrome cycle track A 250m track would be ideal for dedicated cycling use with a reduced central arena area capable of accommodating a variety of sports. Track (m) Length (m) Width (m) 250 116 78 333.333 138 97 400 181 104 A 400m track should only be contemplated where there is a requirement for a grass central area for hockey or football. Where the need is to refurbish an existing quarter-mile track, consultation should take place to adjust the geometry to the dimensions of a 400m track.

Answer 2

Measurements for the average bicycle are 1800 mm long with handlebars 650mm wide.