I just bought a rear rim for motorcycle but it doesn't have brake rotor. Pattern of mounting bolts is 4 holes (in square) and spacing between holes is 55/56mm (maybe 55.5mm) - square base. And (square) diagonal spacing is ~80mm. Center hole seems to be 58mm.
I'm looking for a disc brake that I can buy to fit that rim.
Any idea what bike has that type of mounting?
Rim is quite small - 13 inches. And I think it is of asian/italian originating brand, but that may be long stretch