Here is an low cost alternative to lock any helmet with or without D rings. These can be bought .
I took a piece of aluminum and cut it in the shape of a T narrow enough to fit the locking clasp on my Nolan 102. I made a short plastic covered cable and bought a small padlock to lock it to the bike. I have locked 2 d ring helmets with the T.
I free handed the cuts, the store bought ones are prettier but I have $0.00 in mine.
Ralph Sims
I took a piece of aluminum and cut it in the shape of a T narrow enough to fit the locking clasp on my Nolan 102. I made a short plastic covered cable and bought a small padlock to lock it to the bike. I have locked 2 d ring helmets with the T.
I free handed the cuts, the store bought ones are prettier but I have $0.00 in mine.
Ralph Sims