1973 Ford Bronco Tires

A 1973 Ford Bronco uses one of four primary bias-ply tire sizes: E78-15, G78-15, L78-15, or 700-15. The correct size depends on the Bronco’s GVWR-based sub-model, so there is not one universal tire size for every 1973 Bronco covered here.

The practical step is to confirm which GVWR grouping and wheel setup the Bronco has before choosing a tire. Since all of these sizes use a 15-inch rim, the difference is not wheel diameter alone, but which specific size family belongs on that configuration and whether the Bronco still has its original-style wheels.

The primary tire fitments for the 1973 Ford Bronco use a 15-inch rim diameter. That applies across E78-15, G78-15, L78-15, and 700-15, so the Bronco’s covered factory-style fitments stay within the same wheel diameter even though the tire sizes vary.

Rim diameter is only part of the fitment picture, especially on an older Bronco that may have had wheel changes over the years. The actual wheel width should also be checked before selecting a tire, particularly if the Bronco has aftermarket wheels or if a radial equivalent is being considered in place of a primary bias-ply size.

No. The 1973 Ford Bronco has GVWR-based sub-model variation, so not every covered Bronco uses the same tire size. The 4300 and 4450 GVWR grouping uses E78-15, G78-15, and L78-15, while the 4500 and 4900 GVWR grouping uses 700-15, G78-15, and L78-15.

That overlap can make Bronco fitment seem simpler than it is, but 700-15 and E78-15 are not shared across both groupings. A buyer should identify the exact sub-model first, then confirm the wheel setup on the vehicle itself before choosing among passenger-style bias-ply tires, whitewall options, or more truck-oriented tread designs.

G78-15 is a primary bias-ply tire size for the 1973 Ford Bronco. It is one of the shared 15-inch Bronco fitments and appears in traditional bias-ply products as well as radial-equivalent sizing options intended for buyers who want to compare construction types.

That distinction matters because a bias-ply G78-15 keeps the original sizing format and traditional look, while a radial alternative changes the construction even if it stays in the same general fitment range. Anyone considering a conversion should verify wheel width, tire dimensions, and vehicle clearance instead of treating a radial equivalent as an automatic substitute.

Radial equivalents for G78-15 include 205R15 as an 80-series metric radial, P215/75R15 as a 75-series P-metric radial, P225/70R15 as a 70-series P-metric radial, and 710R15 as a bias-look radial. These alternatives keep the Bronco in a 15-inch radial-based fitment family while offering different sizing conventions.

Each of those options should be evaluated against the wheel and vehicle setup rather than chosen by label alone. G78-15 radial equivalents carry a recommended rim-width range of 6 to 8 inches, and the Bronco should also be checked for steering and fender clearance, especially if the suspension, wheels, or ride height have been changed.

Start by confirming the Bronco’s exact primary tire size, then match it to an actual radial equivalent that belongs to that size family. The wheel diameter must stay at 15 inches, and the wheel width should be checked against the recommended range for the equivalent radial under consideration.

A conversion also deserves a close look at overall tire dimensions, steering travel, suspension condition, and body clearance. An older Bronco may have aftermarket wheels, lift changes, or worn components that affect how a radial sits and moves in the wheel opening, so construction changes should be treated as a fitment review rather than a simple tire swap.

A G78-15 tire for a 1973 Ford Bronco should first be chosen by confirming that G78-15 is the right primary size for the Bronco’s sub-model. From there, the decision comes down to intended use, sidewall appearance, and whether a traditional bias-ply tire or a radial equivalent better matches the vehicle’s role.

Available G78-15 choices include whitewall and blackwall presentations as well as a more truck-oriented STA Super Traxion option. That means a Bronco being restored for period style may call for a different tire character than one used for utility driving, even when the primary size itself stays the same.

1973 Ford Bronco tire options include blackwall, wide whitewall, narrow whitewall, and dual-white-stripe sidewall treatments, depending on size. The widest variety appears in L78-15, while G78-15 and 700-15 also offer a mix of blackwall and whitewall choices.

Sidewall style affects the Bronco’s presentation more than many buyers expect, especially on a short-wheelbase utility vehicle where the tires are visually prominent. A blackwall usually leans more toward truck or off-road character, while whitewall or stripe treatments can create a more restoration-oriented look within the correct size family.

Tires for the 1973 Ford Bronco are available from Coker Classic, STA, Firestone, and BFGoodrich, depending on the size. Brand availability changes across G78-15, L78-15, and 700-15, so the correct tire size comes first and the brand choice follows from that fitment.

The brand decision is best made alongside tire series, sidewall treatment, and the Bronco’s intended use. Some options are clearly oriented toward traditional passenger-style bias-ply appearance, while others are more truck-focused in character, which makes it useful to compare the full tire specification instead of choosing by brand name alone.

A period-style 1973 Ford Bronco starts with the correct primary bias-ply size for its GVWR-based sub-model, then narrows the choice by sidewall and tire character. Depending on size, that can mean a blackwall utility look, a traditional whitewall presentation, or a more truck-oriented tread within the proper 15-inch fitment family.

The best visual match depends on how the Bronco is being interpreted rather than on one universal appearance rule. Owners aiming for higher-detail originality should compare the tire choice with vehicle-specific historical references, while buyers pursuing a restoration-oriented street presentation can focus on the right size and a sidewall style that suits the truck’s era.

Tire construction changes the look of a restored 1973 Ford Bronco because a bias-ply tire preserves the original sizing language and a traditional vintage profile, while a radial alternative introduces a more modern construction even when it stays close in overall fitment intent. That difference is visible before the Bronco even moves.

Appearance is only part of the decision, but it matters on an early Bronco where stance and sidewall shape define much of the vehicle’s character. A bias-look radial can help bridge that gap on sizes where one exists, though wheel width and clearance should still be confirmed before changing away from the primary bias-ply fitment.

Yes. Modifications can change tire fitment on a 1973 Ford Bronco even when the tire size itself is correct for the original application. Aftermarket wheels, different wheel widths, suspension lifts, ride-height changes, and body alterations can all influence how a 15-inch Bronco tire sits and clears.

That is especially important when comparing shared sizes such as G78-15 or L78-15 across different Broncos, because the tire may be correct in size but still unsuitable for a changed wheel or altered stance. Clearance at full steering lock and through suspension travel deserves attention before committing to a replacement tire.

Before driving a 1973 Ford Bronco on new tires, inspect the wheels for correct diameter and condition, confirm that lug hardware seats properly, and make sure inflation is appropriate for the tire being used. A quick visual check for clearance around steering, suspension, and fender areas is also worthwhile.

An older Bronco should also be checked for worn steering or suspension components that could affect how the new tires behave on the road. After a short initial drive, recheck air pressure and look for any signs of rubbing, uneven seating, or interference, especially if the vehicle has not remained completely stock over the years.

700-15 tires on a collector 1973 Ford Bronco should be kept properly inflated, inspected regularly for cracking, bulges, cuts, uneven wear, and air loss, and protected from long periods of harsh sun or ozone exposure during storage. Low-mileage collector use does not prevent age-related tire deterioration.

Maintenance also includes checking the Bronco’s wheel condition and looking at how the tires wear over time, since old alignment or suspension issues often show up slowly on a vehicle that is driven only occasionally. A collector truck that sits for long stretches benefits from periodic inspection rather than waiting for the next outing.