Eclat channel spline drive sprocketthe channel is a perfectly cnc machined symmetrical bmx sprocket available in a variety of tooth sizes the weight has been reduced with hollow spokes and as a spline drive only sprocket at the center is a heat treated 48 spline crmo insert for use with a19mm spindle featuresmaterial 6061 t6 alloy full cnc with heat treated splined crmo insertthickness 8mmweight82g 23t 90g 25t 94g 26t 102g 28tbuyeclat components from chain reaction cycles