G78-15 equivalent

[Mike80D]

Sorry to beat a dead horse, but I’m wanting to find a tire size as close as possible to the G78-15 that came on the truck originally. I thought I had found the pot of gold at the end of the rainbow when I saw a truck at the Southeast truck nats that was being restored. It was sporting a set of bias ply G78-15 white walls from Royalton. Well, they were the last set made as when I called the company they told me there wasn’t enough interest to keep up production. Even though they had the perfect look, I like to get out on the open road with my truck so I will be sticking with a radial. I’ve seen a truck with 225/75/15s that looked good, but I’m getting conflicting reports that a 215/75/15 is also an equivalent. I haven’t seen a truck in person with that size however. I currently have a set of Firestone LR78-15 bias style tires from Coker on my original 15x6 wheels. I am not satisfied with the ride, and wanting to replace them. Attached is a pic of the Royalton tires, and the truck with the 225s.

[Stocker]

Found on the web:

The Metric equivalent of the G78-15 load range C trailer tire is a 205/75-15 tire which is designed to fit up to a 6-1/2 inch wide rim.

Tire Size Overall Diameter Section Width
G78-15 28.0" 8.4"


http://www.vintagecarconnection.com/...sion_chart.htm

[SCOTI]

A 205/75-15 is only 27" tall mathematically.

Originally Posted by Mike80D

Sorry to beat a dead horse, but I’m wanting to find a tire size as close as possible to the G78-15 that came on the truck originally. I thought I had found the pot of gold at the end of the rainbow when I saw a truck at the Southeast truck nats that was being restored. It was sporting a set of bias ply G78-15 white walls from Royalton. Well, they were the last set made as when I called the company they told me there wasn’t enough interest to keep up production. Even though they had the perfect look, I like to get out on the open road with my truck so I will be sticking with a radial. I’ve seen a truck with 225/75/15s that looked good, but I’m getting conflicting reports that a 215/75/15 is also an equivalent. I haven’t seen a truck in person with that size however. I currently have a set of Firestone LR78-15 bias style tires from Coker on my original 15x6 wheels. I am not satisfied with the ride, and wanting to replace them. Attached is a pic of the Royalton tires, and the truck with the 225s.

The two sizes are so close it would be hard to tell them apart. They'll both fit on a 6-7" wheel. The 215 = 27.7; the 225 = 28.3".