Wolf Tooth 104 BCD Revolution Bikes March 6, 2014 Wolftooth Drop Stop Rings These fit all common cranksets using 104 BCD mounting. See this WTC Tech Document if you have a Shimano Double M785 XT or M665 SLX double crankset Note that the 30T chainring is threaded and has a 48 mm chainline. All other rings have 50mm chainline. All chainrings feature our Drop-Stop tooth design and are made from 7075 Aluminum. Use a 10 or 11 speed chain. The only brand of chain we don’t recommend is Wippermann. Be sure to order a colorful set of Wolf Tooth chainring bolts to go with your new ring! For the 30T order our 10mm (long) bolts and all other sizes order the 6mm (short) bolt+nut combo. Color: Black Product Weights: 30t – 36g, 32t – 47g, 34t – 56g, 36t – 60g, 38t – 66g For more information please contact your local dealer. Or us directly from our contact page.