Splined singlespeed sprockets for trials and biketrials bikes. Screw-on sprockets have a screw with wich can be assembled on cranks or hubs. We do offer range of splined sprockets with various number of teeths or the position of teeths which can be on side or in the middle of the sprocket base. Aluminium or steel sprockets are available. Steel sprockets are very durable and aluminium ones are very light and they are used on racing trials bikes.