Wondering what other racycle pacemaker chainwheels out there have these little holes drilled in the outer rim. Look closely they are very imperfect in their placement on this one (borrowed from a local chum).
These look like a diy mod to me but what do you guys think? I feel like I've seen other PM chainwheels with these little holes, did any come from the factory like this? Any ads show this?
Also anyone know how they were manufactured? These look cast to me...
These look like a diy mod to me but what do you guys think? I feel like I've seen other PM chainwheels with these little holes, did any come from the factory like this? Any ads show this?
Also anyone know how they were manufactured? These look cast to me...