Front -Runner Tire Size ?

What is the largest size Tire that you can run on a 15" x 4.5" Front Slotted wheel for a G***er application . Looking at a Firestone 6.70 x 15 Too big or OK ? Best size ?

 

Are you talking "Race" tire or "Street" tire?
Front Runner is a race tire......................on my race car I run the tallest tire I can get, with a 27.5" diameter.

 

Should have clarified......................tallest tire that will fit. The tallest "Front Runner" is 28" in diameter.

http://www.summitracing.com/parts/GDY-1966/?rtype=10

 

Street or drag?

 

I think a P205/75R15 would work pretty well. About 27 inches tall, available at any tire store.