Shimano pulled out all the stops for the bike porn junkie on this one. Yumeya Limited Edition is Gold complemented, titanium and carbon fiber upgrades for your dreary grey XTR group (for those of us who just think it's not pretty.. enough..). Does it save weight? Yes, it does, but who cares, man? It's gold, titanium, and carbon fiber! Kit Contains- -Carbon Fiber rear derailleur plates -White derailleur pulleys -Titanium hardware for the front and rear derailleurs -Titanium 17-20T with gold carrier -Crank bolt -Yumeya chain -Titanium bolts, bracket band, and adjustable plate unit for shift pods -2mm SIS outer cable housing -Hydraulic brake lever lid -Disc hose -Titanium brake bolts, and hose bolts -Compatible only with Shimano XTR M970 edition