If you're interested in converting your Shimano Dura Ace, Ultegra, 105, or Tiagra crankset to a single-ring setup for cyclocross, gravel, or just all-around simplicity, grab the Wolf Tooth Drop-Stop Shimano Asymmetric Chainring and a pair of Wolf Tooth 6mm chainring bolts and you're good to go. These beautifully machined chainrings mount to the big ring position of the cranks, and are offset inward for an ideal 1x chainline. They feature Wolf Tooth's patented Drop-Stop B technology for optimal chain retention, long wear life, and efficient mud-shedding capability.