50's Tire Size 60's Tire Size 70's Tire Size Today's Modern Tire Size
750-14 775-14 F78-14 205/75R14
800-14 825-14 G78-14 215/75R14
850-14 855-14 H78-14 225/70R14 is not them same height and width, but is the closest available size. Actual equivalent sizes 225/75R14, 235/70R14, 235/75R14 are not available by a modern radial tire manufacturer.
560-15 or 600-15 165R15 165/80R15
670-15 775-15 F78-15 205/75R15
710-15 815-15 G78-15 215/75R15
760-15 845-15 H78-15 225/75R15
800-15 900-15 L78-15 235/75R15
600-16 / 650-16 215/70R16 is the size we recommend.  It is not the same height and width, but it is the closest available size in a modern radial tires.  16" bias ply tire radial conversion charts do not exist.  Internet searches give different conversions sizes, but many of them do not correlate to any actual modern day radial tire size that is currently being made.
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