Hi, I had a dished 13 in Moto Lita wooden rim fat type.. took it off as it felt too small , rather like a go cart. Now fitted a 15 in flat 4 spoke Moto Lita wooden rim... much better and feels rather more traditional..
which MG did you have? my last one was a TC, had an 18 in wheel! probably why the 13 inch felt too small!