Spline-drive sprocketMaterial: 6061-T6 aluminumSize: 23t, 25t, 26t, 28tTeeth: 1/8"Bore: 19mm 48 splinedThickness: 8mmExtra info: heat treated 48 spline crmo insert, runs directly on 19mm spindle, hollow cnc spokes for reduced weightWeight (kg): 0.082 (23t)Color: black, gold, high polished