Before XTR M9100 is even widely available in shops, Wolf Tooth Components is already on the case. Specifically? Replacement chain rings. As they’ve found out in their personal testing and development, the new XTR chains are not compatible with the current chainrings on the market. That meant a new tooth profile had to be designed to play nice with the new chains while offering their signature chain retention and long wear.
One of the biggest hurdles for aftermarket brands like WTC is that the inner links of the chain extend farther past the rollers on the new design. That and the fact that the chain interacts with the chainring differently led to the complete redesign of their tooth profile to operate smoothly and quietly with the new XTR drivetrain.