46 Super Tire size ? - 16" wheels

[ceejay]

Hi all,

The 46 Buick I bought today has 16" wheels.

What would have been the original tire size and what would be the best modern radial size to use ? (I want to maintain the original rolling diameter so the speedo will read correctly) Increase in width would be fine.

[Buford26]

The original size would have been 650-16 which is about 29.1 inches in diameter and about 7 inches in cross section width, but I don't know what that translates into a modern radial size. Both Coker Tires and Diamond Back Radials (www.dbtires.com) sell the original size.

[GMorse]

My '39 series 40 had 16 inch (6.50X16). I changed to 225/75R16 from Diamondback Radials. They fit without rubbing on sharp turns, and the speedo seems OK. Diamondback also has a good selection of wide white radials.
Gary