Weight weenies, here’s your answer to splined drive sprockets, Profile‘s Elite splined drive race sprocket:

Made of 7075 Aluminum, works with the 48-spline 19mm spindle. Used with traditional cranks or No-Boss cranks, no spider bolt is required.
This sprocket is driven entirely by the spindle. The Splined Elite Race sprockets are available in Red, Black and Blue with 3/32 teeth.

For a break-down on weight and the full photo of the sprocket, read on below!

Elite Splined drive race sprockets are available in:

36t – 5oz
37t – 5.1oz
38t – 5.2oz
39t – 5.4oz
40t – 5.4oz
41t – 5.6oz
42t – 5.8oz
43t – 5.9oz
44t – 6.1oz

Damn. That’s light. I wouldn’t recommend sprocket stalls on these bad boys. Also, take note of the teeth thickness. For 3/32″ only! Grab one at Profile!