I recently picked up a 1990 Gazelle Primeur which I am restoring, and one item is replacing the frame lock. Whoever owned this bike removed the frame lock by snapping it off of the frame, leaving two jagged/sharp holes in the seatstay. I'm planning on welding some threaded bosses to these.

Does anyone know what size metric bolt thread frame locks use? Is there a standard size?

I'm going to be using the AXA Victory. I checked their website for specs, but the only info they give is "Mounting Material Not Included." I've searched around and can find no information on bolt sizes commonly used for these.


Seatstay hole