Originally Posted by
Jamminatrix
I believe the XT uses an aluminum lockring. You can use a steel lockring from a lower end cassette if you're worried about pulling threads off.
Or a Token lock ring.
http://www.amazon.com/Token-Products...token+cassette MUCH better than most Shimano lock ring, and occasionally on sale for ridiculously low prices - I got 3 for $5- ......