"My BMW R51/3 from 1951 has a front jack/ fender support to lift the front wheel to take that one out. There is also a foldable rear fender to take out the rear wheel when on the central jack. Both rims and wheels are the same. So once on the road, in the middle of nowhere, you could swop tires (when the rear had not enough profile e.g.) by only swopping the wheels. Very handy in these old days."