[Hemicolt]

The original question on this thread : Is there a size that is needed for the Day 2 group? Now we know the specs of the F60 and L60-15. The L60 covers the guy wanting 28 inch height and the F60 doesn't. Now, if someone wants to run 15"x 8" rims and wants 28 inch tall tires, the only thing he can run is a L60. This tire has a section width of 12". This tire is to wide for an 8" or 7" rim. (I'll get back to this in a minute).
The F60 is the required width for the 8" rim but it doesn't have the 28" height that the buyer wants. So this tire is to short in the eyes of the buyer.
If the buyer wanted to run a 10" rim, the L60 will cover his needs, but not for the 8" rim. This is why I made the statement in my 1st two post. Is there is a void here for the tire size the buyer wants? I say yes as of right now. I have not seen a 28" tall, Polyglas tire, etc. that is the proper width for a 8" rim. I'm not saying there is or isn't, I've just not seen one. So this is why I said what I said. I saw a "size that is needed for the Day 2 group".
The person who wants this size rim and tire may or may not care what is exactly period correct. It's their car and they can put whatever size rim and tire on it that they want. I'm going to put modern, repop Cragar S/S rims on my car. They are made a little different than the "real deal", but I don't care. The only person I need approval from is myself.

Now about rim width and tire width. You can get a full contact patch with narrower rims and a tire to wide, using a DRAG SLICK. The reason is because a drag slick has soft, flexable side walls and when the car accelerates the tire sidewalls allow the tire to flex enough to put the full width on the ground. The reason alot of 10.5 tire guys tend to run a little wider rim is because those street/strip tires have a stiffer sidewall. The can't flex as much and get the entire patch down.
Street tires are different. They are made for driving on the street. Which means proper air pressure rated for the tire. Not 12 to 15 lbs so the tire can have even contact. That's for racing, we are talking about driving on the street. When you mount a street tire that is too wide for the rim, the sidewalls pull in and the edges of the tire pull up to some degree and they do not have the same pressure per square inch across the contact patch. And the reason the center wears out first? Heat. Heat builds up in the area that has the most pressure per square inch and will wear that part of the tire quicker. There could also be a problem in cornering and wet conditions.

All this doesn't have anything to do with looking dead on correct or driving your car 8 to 10 miles at a time or really anything that has been brought up.
It's got to do with a gap in a tire size being offered, that others and myself like to run. 28" tall tire with a section width of 10" that works good on a 8" rim, so as to have a more even load on the tire. I'm sure that SmallHurst is speaking of existing tire sizes and that's fine, but I do not know for sure if there was ever anything offered that might cover that size being needed by buyers who are wanting that size.