Is the p2m compatible with rotor Q chainrings?
The P2M doesn’t have quite the stated accuracy (for what that’s worth) and my preference would be a rechargeable battery but I see they have a sale on making them pretty reasonable cost wise. 
Is the p2m compatible with rotor Q chainrings?
The P2M doesn’t have quite the stated accuracy (for what that’s worth) and my preference would be a rechargeable battery but I see they have a sale on making them pretty reasonable cost wise.