Answer: Our current ring designs are compatible
Incompatible Legacy Rings:
GUIDERING M (All styles: Direct Mount, 104BCD)
In 2019 Shimano® launched new 12-speed XTR®, XT®, SLX® Mountain bike groups. These 12-speed groups use a chain with a different shape than previous 12-speed chains.
We updated our chainring designs early in 2019 to be compatible with these new chains. 100% of Guidering UL are compatible with these new chains.
* The Guidering SL design has been updated for compatibility in 2019, however there may still be some older incompatible Guidering SL in retail locations. You can determine compatibility by looking for the laser etched version code on the inboard side of the ring in the form of "Vxx" where xx are the version numbers. V31 or V40 are 12s compatible. V30 or lower are not compatible.