Motorcycle helmet size glasses - AO Original Pilot Sunglasses, Bayonet Temples

Smallest size (52 mm) available to fit a full size Moto Helmet, including "Flip-up" type, but test in bike for proper position and pressure on the bridge of the nose usually by upper padding hitting the frame, if so move forward 1/4 of an inch and no more disconfort(or blister).
Bayonet sidearms adapt well to temples and allow motion by the helmet, without hurting ears, but easy to change angle for free space.
Possible 20- 30% light transmisión upper field, 50% lower lens (Ideal would be 50 % top 3/4 of an Inch, and 90% transmision the rest), but it protects from strong sun and allows to see some GPS Zumo 665 info (not much the lettering , but direction of travel). Not to be used in Tunnels or underpass without lighting, but easy to drop 1/2 inch into the nasal bridge and see the road.
Test using it on Thin Film instrument panel, you may not see much depending on the angle of the light.
With the great Return Policy and price of OP worth trying as general riding glasses with neutral tone that does not change colors such us Low Fuel , side stand down and other warning lights.(some are "orange" others "yellow")
Edu