Originally Posted by
soyabean
A pedal wrench, Park Tool or compatible, is still the proper tool for these, because a proper pedal wrench is about 2x-3x thicker than a cone wrench.
The MKS quick-release couplers appear to have ample space to justify a proper pedal wrench, whereas a hub nut has only enough space for only a cone wrench.
As a 20-year user of MKS AR2-EZY pedals, and owner of a Park Tools PW-4, I can confirm that the latter will not fit the couplers, but the Park cone wrench will. I'll see if I can get some images for you. I completely agree that a pedal wrench *should* be used for pedals... if there is enough space.