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The direct mount chainrings for SRAM cranksets with the 3 bolt mounting interface. They replace your existing spider and chainring with one clean looking, lightweight, and stiff piece of machined billet. They are available in the Drop-Stop B tooth profile, which is optimized for SRAM Flattop chain. It is also compatible with all other 9, 10, 11, and 12 speed chains except Shimano 12spd chain. Compatibility These direct mount chainrings will replace your existing chainring and spider or replace the direct mount ring on SRAM cranksets including the DUB cranks. The ring is attached via 3 bolts on the back side of the spider near the spindle. Note that these chainrings are NOT compatible with SRAM 8-bolt direct mount cranksets. Wolf Tooth’s patented Drop-Stop® wide/narrow tooth profile for the ultimate chain retention and mud shedding ability There is one offset: Standard Road/CX/Gravel: 6mm offset for cyclocross and road crank applications with 47mm chainline Praxis Works Road/CX cranks use the 6mm offset.   If using a 9-speed drivetrain use a 10-speed chain (shifts and works well on a 9-speed drivetrain and fits the ring tighter for better chain retention). Recommendations Recommend the use of a clutch style rear derailleur for the best chain security. An L-wrench works best since the crank spindle may contact a socket adapter and prevent it from engaging properly. Use the same 3 bolts to attach the Wolf Tooth ring or we carry replacement bolts Related Products For a longer lasting and more durable option check out the CAMO System that offers stainless steel chainrings. We recommend using a T25 L-Wrench or similar for removal and installation of the bolts. The stock bolts are easily damaged when removing them to install a direct mount chainring. We have replacement bolts if you need them. Tech Specs Weights: 38t • 90g | 40t • 96g | 42t • 104gMaterial: 7075-T6 aluminumMade in the USA  Patent and trademark information Listing and template services provided by inkFrog