Ok, so a riding buddy and I are stumped. We both need new cranks for our 06 Enduros, which we will use for trail riding/xc and downhill. Until now it seemed the external bearing (05 and 06) Xt crankset was perfect for the application. Now, Shimano has Lx in the same design and options, for nearly half the price. In the past, Lx stuff has generally differed from Xt in alloys used, bearing quality, and tolerances among items of the same design. What sort of differences could justify spending nearly double for the Xt cranks? There is a marginal weight difference, which might come down to chainrings and hardware more than crankarms, spider, axle, cups and bearings. So to anyone who can shed some light on this, please do.