Alza Dny květen 2. týden MPLA317652

Bicykle


Front Fork

The front fork is a key component of any bicycle and determines its overall quality. Suspension forks use compressed air or a spring system to insulate the rider from the roughness of the terrain. Air suspension is the more common option, despite it being more expensive than spring suspension; moreover, the air pressure can be adjusted to the weight of the rider. Spring suspension is the cheaper option and provides a slightly more sensitive damping; however, one disadvantage is that the spring force depends on the weight of the rider, and sometimes the spring can harden at low temperatures. 

Bicycle Frame

An ideal bike frame is lightweight and sturdy. Frame sizes are measured in inches or units, or sizes S, M, L, XL. Bicycle frames are typically made from steel, aluminium or carbon fibre. Steel frames were once common but are now in decline; while being strong and relatively cheap, they are heavier and subject to rust. Alloy frames are cheaper but heavier than carbon fibre frames, which offer a lighter, more flexible, and yet equally strong option.

Gears

Featured on most bikes, gears allow you to select the degree of difficulty when pedaling. At low gears (e.g. when cycling uphill), pedalling is easier, but the pedal frequency increases at the same time. Conversely, when using a high gear (e.g. on a flat road), you pedal less but more forcefully. Gears are essential for anyone who plans to cycle on mixed or hilly terrain.
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