Wolf Tooth 104 BCD Chainring - 32t 104 BCD 4-Bolt Drop-Stop ST Requires Shimano 12-Speed HG+ Chain BLKWolf Tooth 104 BCD Chainring 32t 104 BCD 4 Bolt Requires Shimano 12 Speed Hyperglide+ Chain Black. The Wolf Tooth 104 BCD chainring for Shimano 12 speed Hyperglide+ chain is designed to fit any 104 BCD crankset. The tooth profile was developed specifically for Shimanos XTR XT and SLX 12 speed Hyperglide+ chain. Compatible only with Hyperglide+ chains Engineered proprietary tooth profile maintains the quiet and smooth performance of the HG+ drivetrain