Originally Posted by
capwater
Only spacer you're gonna need on a 9-speed is if the wheel is a Mavic. There is only one way to put on a cassette since the splines are different. 9 speed SRAM has the cogs bolted together. Forget the grease, cassette doesn't move on the spline.
Good point! I misread the OP, thought he was installing a 10-speed cassette. Have edited my previous post.