Gen 2 sprocket Lock ring information

[Elduderino]

Gen 2 Performance Line CX.

Can someone explain why the Sprocket Lock ring is a left hand thread please.

Also how does the rubber O ring help secure the lock ring, even if the lock ring is not tightened to the correct torque (according to Bosch instructions).

 

[Elduderino]

Just in case this can be of help to someone working alone, & not very strong lol.
I was having great difficulty trying to hold the left crank arm whilst both holding the Bosch lock ring tool securely in the lock ring, & turning the ratchet.
So I removed the non-drive side pedal, & installed it from the inside of the non-drive crank arm which then secured the non-drive side crank arm against the underside of the down tube when turning the lock ring ratchet on the drive side.
I could then use both hands to both hold the sprocket lock ring tool, & turn the ratchet with ease.

 

[wildtrak]

Can someone explain why the Sprocket Lock ring is a left hand thread please.

It's the law.

The law of physics.

 

[peterh_nz]

Can someone explain why the Sprocket Lock ring is a left hand thread

I presume because the inertial reaction of rotating the peddle crank while riding is to tend to tighten the ring rather than loosen it?