What size tire on 10" wheel ?

I've have mounted both 275/60R15 which are a little small on that wheel and 295/65R15 which fit better. 30 inches tall though. In my 68 Plymouth Roadrunner. The 275s were supposed to be 28 inches but on a 10 inch wheel were a little smaller. The 295s were right at 30.A 285 or 295 isn't going to be significantly different. A 285 by 1 manufacturer may sit better than a 295 by a different manufacturer. Apples to apples comparison the 295 will probably fit better. Not sure about that recommendation in a 40 series though. Good luck