These are typically found on S-120 (3/4-ton) 4×4 or 2wd models, as well as some early A-series (Golden Anniversary) trucks from late 1957.

Technical Specifications

Compatibility Notes

• The Bolt Pattern: This “Large 6” ($6\times 7.25$) pattern is specific to vintage IHC, Dodge Power Wagons, and some Studebaker trucks. It is not the same as modern 6-lug patterns (like Chevy/Toyota $6\times 5.5$).

• Safety: These appear to be the welded drop-center type, which is much safer and easier to service than the “widow-maker” split rims found on larger 130+ series trucks.

• Hub Clearance: The large center bore is designed to clear the massive front locking hubs (as seen in your first photo) and the floating rear axle hubs.

Recommended Tire Sizing

• Period Correct: 6.50-16 or 7.00-16 bias-ply.

• Modern Radial Equivalent: LT215/85R16 or LT235/85R16 (The 235s are wider but usually fit well on the 6″ rim).