Wolf Tooth renames narrow-wide chainrings Dropstop A, B & ST based on compatibility - Bikerumor
Amazon.com : Wolf Tooth Elliptical Mountain Bike Direct Mount Oval Chainrings for SRAM Cranks (30 Tooth, Drop-Stop A, PowerTrac, Boost, MTB) : Sports & Outdoors
Which freehub body do I need? SRAM and Shimano 9, 10, 11 and 12-speed MTB setups explained | off-road.cc
Shimano vs. SRAM: Guide to Groupsets & Drivetrains | The Pro's Closet