Olympic-cut cottered bicycle chain wheel (G), a chainring with attached crank arm. It sits at the front of the bicycle drive, turning pedalling force into chain movement, and suits cottered crank set-ups. The chainring is black, with large round cut-outs around the centre, smaller holes between them and a toothed rim; the crank arm ends in a round pedal eye. Available sizes are 44T / 46T / 48T, in BLACK or BCP.