OK-I'll go look. OK, I'm back. Page 348 the name is Sprocket Specialists Stealth. Cost is $64.99 for our bike the teeth range is-39,41,42,43,44,45,46,47. the part number is #500-ST302. Here is what it says-
>Steel teeth and an aluminum inner part
>Both parts permanently joined with super tough forged rivets
>Will last 3 times longer than any aluminum sprocket on the market today
>Half the weight of a steel sprocket to help you fly.
BTW- if anyone is shopping for a Christmas gift for me, I want a 45 tooth.