Wolf Tooth 110 BCD Gravel CX Road Chainring - 42t 110 BCD 5-Bolt Drop-Stop ST For Shimano HG+ KMC 12-Speed Chains BLKWolf Tooth 110 BCD Gravel CX and Road Chainring 42t 110 BCD 5 Bolt Drop Stop ST For Shimano HG+ and KMC 12 Speed Chains Black. Wolf Tooth 110 BCD 5 Bolt Drop Stop ST chainrings are manufactured using premium 7075 T6 aluminum and designed for use with Shimano HG+ and KMC 12 Speed chains. These chainrings are optimized for Gravel Cyclocross and Road disciplines. Wolf Tooths patented Drop Stop ST wide narrow technology provides maximum contact on the