SRAM DM DROP-STOP B CHAINRING - 0MM OFFSETOur direct mount chainrings for SRAM cranksets replace your existing spider and chainring with one clean looking, lightweight, and stiff piece of machined billet. They are available in 3 different offsets: standard 6mm offset, Boost 3mm offset, and BB30 short spindle Superboost 0mm offset. This chainring has a 0mm offset to suit Superboost, and also SRAM MTB cranks with DUB spindles that require chainring positioning for the 55mm chainline specified