eBay
A circa 1920s metal disc road wheel.It is stamped 'DUNLOP' on centre and '28' on rimtotal daimeter: 568mmtotal width: 73mmcentral hole is 83mm diameterPCD of 4 stud holes is 130mm

I am informed that this wheel fits B.S.A cars made between 1923 and 1925 and will fit all four and six cylinder models.