are the downvotes based on? cause i'm talking facts here, oh let's remember the 28gr for a udh, so at the axle, Gx vs GX t-type you have ( cassette + deralieur ) 738gr vs 936gr, so 200gr of extra unsprung weight, on a total of 219gr more for t- type, now on XO is 370gr, so the huge (100gr) weight saving on the frame are not only gone but gone right at your rear axle, nice