Hi Charlie, My little book on all things Brum reveals —-Rear wheel,2 inch OD,x 3/4 inch Bore x 11/16 inch wide. Hoffman (MS8 /V3) , FAG MS8,etc. Front wheel, 42mm x 15mm x 13mm wide. (SKF 6302). The reason for the mix of impierial and metric is the rear wheel is of Shipley design, the front is all Brum (Aerco Jig & tool). Mad!!!
