Community enterprises such as Bike for Good take donated and no longer wanted bikes and bring them back to use. These organisations provide training to volunteers who do much of the rebuilding. Bikes are typically resold for £100 - £200 which is used to help support the many promotional activities that these organisations deliver.
If you are buying new, the cost of bikes vary from type and also quality of components. More expensive bikes tend to be made from lighter materials. There are different types of bike designed for slightly different terrain. This is only a brief overview.
Hybrid – The general purpose hybrid bike is a mix of road and mountain bike features. They have the flat bars and stronger frames of a mountain style bike, but the larger wheels of a road bike. Ideal for city cycling, rougher terrain, commuting.
Road Bike – Drop handlebars, larger wheels (700 mm), narrow tyres to reduce rolling resistance. Ideal for city cycling, longer distance commutes and leisure rides.
Cyclocross or Gravel – Based on road bikes, have stronger slightly heavier frames and capacity for wider tyres. Ideal for canal paths, informal paths, longer distance commutes and leisure rides.
Mountain bike (Hard tail) – Strong heavier frames, wider tyres and front suspension forks. Gear ratio is designed for hilly environments. Ideal for rough terrain, off road leisure rides.
Mountain bike (full suspension) – Strong heavier frames, wider tyres and front and rear suspension forks. Gear ratio is designed for hilly environments. Ideal for rougher terrain, off road leisure rides.