Not an expert on these but I do know that 1934 Pontiacs used 17" wheels - with, I think, wires being the only choice - and the 1935 Pontiacs used 16" steel wheels with 6.00x16s on the sixes and 6.50x16s on the eights. The 1934 cars used 6.00x17 tyres so I guess the wheel rims were maybe only 4" wide?