Trials bike anatomy

Trials bikes are rigid-framed with slammed seats and high front ends. The lighter the bike, the easier it is to move about. Most have 26in wheels but 20 and 24in trials bikes also exist. They’re usually singlespeed with a 1:1 or 1.5:1 gear ratio (the larger the wheels, the lower the gear ratio). A chainring guard or frame bashguard is essential. Hydraulic rim brakes are commonly used because they clamp the wheel when it’s stationary more efficiently than disc brakes (but offer less power when the wheel is rotating). Magura’s HS33 is the go-to trials rim brake. Wide rims are used for increased air volume and lower tyre pressures, giving more grip and impact absorption. The wide tyre profile also means it’s less likely to get ripped off the rim during sideways landings.