Chainring Wolf Tooth Race Face Boost Direct Mount Shimano 12sp 30TChainring Wolf Tooth Race Face Boost Direct Mount Shimano 12sp 30T The new Shimano XTR, XT, and SLX 12spd Hyperglide+ chain works differently than other products on the market so Wolf Tooth engineers developed a completely new tooth profile to provide optimal chain retention and durability when using this new chain technology. The new HG+ chain interacts with the chainring much differently than a traditional wide narrow design. Wolf Tooth engineers