That's based on normal tightening torque for medium strength M8 screws. Shimano SI for the FC-2200, for example, suggests 35-50Nm, which would only be possible with very high strength (12.9 grade) screws. Obviously if you have the manufacturer's service instructions to hand, use those rather than generic numbers.
That's based on normal tightening torque for medium strength M8 screws. Shimano SI for the FC-2200, for example, suggests 35-50Nm, which would only be possible with very high strength (12.9 grade) screws. Obviously if you have the manufacturer's service instructions to hand, use those rather than generic numbers.