1951 Willys Tire Fitment Guide

1951 Willys vehicles use five different sizes across the lineup: 670-15 for the 473 & 673 Wagon, 6.50-15 for the 483 Sedan Delivery, 700-15 for the 4x473 Wagon and some Jeep CJ-3A applications, 600-16 for the Jeep CJ-3A, and 640-15 for the Jeepster 473 & 673. Rim diameter is not the same across the range, because most passenger and wagon applications here are 15-inch while the CJ-3A also appears with a 16-inch fitment.

That means a 1951 Willys owner should start with the exact model before thinking about brand or sidewall style. Rim width recommendations also vary by size where published, with examples including 4.50 to 5.00 inches for many 670-15 tires, 5.00 to 5.50 inches for 700-15, 4.00 to 4.50 inches for many 600-16 products, and 4.00 to 5.00 inches across the 640-15 offerings depending on the specific tire.

On a 1951 Willys, 670-15 is a numeric bias-ply tire size. The 6.70 portion refers to the nominal section width, and the 15 refers to the wheel diameter in inches. It is not a modern metric radial size, so you do not read it the same way you would a P-metric code with millimeters and an aspect ratio.

That matters because a 670-15 belongs to the 473 & 673 Wagon application here, not to every 1951 Willys model. If you are comparing tires across the Willys range, the code tells you you are dealing with a traditional 15-inch bias-ply fitment, and the next check should be the actual wheel and the wagon model rather than assuming another 15-inch Willys size is interchangeable.

No, 1951 Willys models do not all use the same tire size. The lineup spreads across five sizes, with only 700-15 shared by more than one model group. The CJ-3A is the most likely to create confusion because it appears with both 700-15 and 600-16 applications, while the wagon, sedan delivery, and Jeepster each have their own model-specific size in this set.

That variation reflects how broad the Willys lineup was in 1951, from passenger-oriented and commercial bodies to Jeep utility platforms. If your title or registration simply says Willys, do not use that alone to pick a tire. Identify the model first, then confirm whether you are looking at a 15-inch or 16-inch wheel before narrowing down sidewall style or brand.

1951 Willys tire options include blackwall, wide whitewall, and narrow whitewall depending on size. The 670-15 wagon size is available in blackwall and wide whitewall, 700-15 comes in blackwall and wide whitewall, 600-16 appears in blackwall and wide whitewall, and 640-15 for the Jeepster includes both wide whitewall and narrow whitewall choices. Sidewall treatment therefore depends partly on the model because each model's size has its own product mix.

For a utility-oriented CJ-3A or four-wheel-drive wagon, blackwall usually aligns more naturally with the vehicle's work-focused character, while a Jeepster or passenger wagon restoration may lean toward whitewall styling. Show standards can be more particular than casual touring use, so if originality matters at an event level, compare your sidewall choice with factory literature, period photos, and model-specific marque guidance before making the final call.

Brands available for 1951 Willys applications include Firestone, US Royal, Coker Classic, Universal Vintage Tire, BFGoodrich, STA, and Avon, depending on size. The 670-15 wagon size includes Firestone, US Royal, Coker Classic, and Universal Vintage Tire; 700-15 includes Firestone, BFGoodrich, and STA; 600-16 includes BFGoodrich, Coker Classic, Avon, and Firestone; and 640-15 includes BFGoodrich and Firestone.

Brand choice should follow the size that belongs to your Willys model rather than the other way around. Once the size is settled, the meaningful comparison becomes sidewall appearance, stated load rating where published, and any special product character, such as the more utility-flavored STA Traxion in 700-15 or the H-rated Avon offering within the 600-16 group.

Within 700-15 for 1951 Willys applications, Firestone and BFGoodrich both appear as bias-ply tires with published 1700-pound load capacity at 32 psi and the same 15-inch rim diameter with a 5.00 to 5.50 inch rim-width recommendation. Firestone is offered in both blackwall and wide whitewall versions, while the BFGoodrich option listed here is a 4.125-inch wide whitewall. Weight differs slightly as well, with the Firestone blackwall at 26 pounds, Firestone wide whitewall at 29 pounds, and the BFGoodrich wide whitewall at 28 pounds.

That makes the comparison more about appearance and presentation than a major spec gap. A restorer choosing a whitewall can compare the visual treatment and brand preference, while someone after a more workmanlike look may prefer the blackwall Firestone or move to the STA option in the same size if tread character is part of the goal.

Rim-width guidance for 1951 Willys tires varies by size. Many 670-15 tires call for 4.50 to 5.00 inch rims, though some 670-15 products extend to 5.00 to 6.00 inches. The 700-15 products shown use 5.00 to 5.50 inch rims, many 600-16 products use 4.00 to 4.50 inch rims, and the 640-15 offerings span 4.00 to 4.50 inches on some products and 4.50 to 5.00 inches on others.

That range is why wheel verification matters before choosing a specific tire, even after you know the nominal size. Two products in the same size may not publish exactly the same recommended rim-width window, so the best practice is to match the wheel you actually have to the specific tire you are considering rather than relying on size code alone.

The listed 1951 Willys products are bias-ply offerings, but tube-type status is not marked directly in the visible size descriptions here with TT or TL codes. That means the practical rule is to confirm the individual tire's sidewall marking and match that to the wheel design, especially on original-style steel wheels where tube use may be part of the intended setup. Jeep and early postwar passenger applications often deserve extra care on this point.

Instead of assuming every bias-ply product is set up the same way, check the specific tire and the wheel condition together. If your Willys is using original or restored wheels, pay attention to the drop center, rivets, and sealing surface, and involve a shop or marque specialist who understands vintage wheels before mounting a tire either with or without a tube.

Original 1951 Willys wheels cannot be treated as universal across all five sizes because the lineup includes both 15-inch and 16-inch applications. A 15-inch wheel can only accept the 15-inch sizes in this group, while the 600-16 Jeep CJ-3A fitment requires a 16-inch wheel. Even among the 15-inch tires, published rim-width recommendations are not identical from one size to another.

That means wheel diameter is the first checkpoint, and wheel width is the second. If you own a CJ-3A, inspect the actual wheels on the vehicle before assuming whether it should take 700-15 or 600-16. For wagons, Sedan Delivery, and Jeepster models, staying within the correct model-specific 15-inch size is the safest starting point before narrowing the product choice.

A stored 1951 Willys should be kept out of direct sunlight, away from electric motors and ozone sources, and off damp surfaces that hold moisture against the tires. Bias-ply tires are especially prone to temporary flat-spotting when they sit in one position for long periods, so periodic movement helps. Clean, dry storage matters just as much as mileage on a collector vehicle of this age.

If the Willys will sit for months, inflate the tires properly, move the vehicle occasionally, or use stands when appropriate to reduce long static loading. Owners of Jeepsters and wagons restored with whitewalls should also keep dressings and solvents off the sidewalls. Storage habits have a direct effect on how the tires look, how smoothly they run after lay-up, and how early sidewall aging begins.

Tires on a 1951 Willys should be judged more by age and condition than by tread wear alone. A sound collector-car rule is to evaluate them closely once they reach the five- to seven-year range and to treat around ten years as the point where replacement deserves serious consideration even if the tread still looks usable. The DOT date code on the tire is the key reference for age.

That approach matters because many vintage Willys vehicles see light annual mileage, so the rubber can age out long before the tread wears down. Heat cycles, storage conditions, inflation habits, and long periods of inactivity all influence service life. A Jeep that spends time outdoors and a garage-kept Jeepster with low miles may age very differently, even when their tread depth looks similar.

Tires on a 1951 Willys should be inspected before every drive and again before any longer road outing. Look for sidewall cracking, tread separation signs, embedded objects, bulges, uneven wear, and pressure loss. On a vintage vehicle, valve stems deserve the same attention as the tire itself because age can affect the whole air-retention system, not just the casing.

A quick walkaround catches many of the issues that strand collector vehicles after they have been sitting. If the Willys has been in storage, roll it forward and backward to inspect the portion of the tread that was on the ground, and pay attention to ride feel during the first few miles. Any vibration, pull, or repeated pressure drop is reason to stop and inspect more closely.

A 1951 Willys 473 & 673 Wagon would have been fitted in the bias-ply era, and the size used here is 670-15. That places the wagon squarely in the traditional postwar American passenger and utility tire pattern rather than in a later radial convention. Original-equipment branding could vary by market and supply, so the most reliable authenticity anchor is the correct size, construction type, and sidewall treatment for the way the vehicle was delivered.

For a careful restoration, start with 670-15 bias-ply and then narrow the visual presentation to blackwall or whitewall according to period photos, sales literature, and the personality of the specific wagon you are restoring. If the vehicle is headed for judged competition, a Willys-focused club or marque specialist can help confirm whether a plain blackwall or a whitewall treatment better fits your body style and market presentation.

Correct tire fitment matters a great deal when showing a 1951 Willys because judges and knowledgeable enthusiasts notice size, construction type, sidewall style, and the overall stance they create. A CJ-3A on the wrong wheel diameter, a Jeepster wearing an obviously mismatched sidewall treatment, or a wagon fitted with a size from another Willys model can change the vehicle's visual correctness immediately. The tire is one of the first things seen at eye level.

Even at local shows, proper fitment helps the vehicle read as coherent and authentic to its period. For higher-level judging, event rules can be more exacting about whether a utility Willys should wear blackwalls or whether a passenger model should carry a certain whitewall look. Check club judging sheets and marque references early, because tire choice affects stance and presentation long before the car reaches the field.

For 1951 Willys Jeepster applications in 640-15, Firestone and BFGoodrich differ mainly in sidewall presentation and some published fitment details rather than in basic construction. The BFGoodrich option shown is a 3.00-inch wide whitewall with a 1190-pound load capacity at 32 psi and a 4.00 to 4.50 inch rim-width recommendation. Firestone offers multiple whitewall looks in the same size, including 2.75-inch and 2.125-inch wide whitewalls at 1190 pounds at 32 psi on 4.50 to 5.00 inch rims, plus a 1.00-inch narrow whitewall with a 970-pound rating at 32 psi.

That gives a Jeepster restorer room to tune the car's appearance without leaving the proper size family. If your goal is a fuller early-1950s whitewall presence, the wider styles are the natural direction. If you want a slightly more restrained look, the narrower whitewall option changes the character noticeably while still keeping the Jeepster within a period-appropriate bias-ply presentation.

1951 Willys tires can be suitable for highway use when they are the correct size, in sound condition, and operated within the product's stated limits. Most of the sizes here are bias-ply offerings without visible speed-letter markings in the listing, while at least one 600-16 Avon product is H-rated, which corresponds to a 130 mph ceiling. In real use, a 1951 Willys is far more likely to be limited by its brakes, suspension, steering feel, and overall vintage vehicle dynamics than by an unusually high speed rating.

The practical question is not whether the tire invites modern freeway speeds, but whether the entire vehicle is prepared for steady road use. A healthy vintage Willys on fresh, properly inflated tires can be enjoyable on ordinary roads, but long high-speed runs call for extra judgment. Treat the tire as one part of a whole system and keep the vehicle's age and intended character in mind.

Published load-and-pressure figures vary by size on 1951 Willys tires, so one number should not be carried across the whole lineup. Examples include 670-15 products at 1450 to 1550 pounds at 32 psi, 700-15 products at 1700 pounds at 32 psi, 600-16 products at 1400 pounds at 32 psi or about 1433 pounds on the Avon example, and 640-15 products at 1190 pounds at 32 psi, with one narrow-whitewall Firestone listed at 970 pounds at 32 psi.

Those figures are tire ratings, not a blanket instruction for every Willys application. Use the vehicle's factory literature as the starting point for service pressure, then compare that with the tire manufacturer's guidance for the specific reproduction tire you are running. Matching the correct pressure to the exact size and product helps preserve handling feel, ride quality, tread wear, and sidewall life.

Before a longer drive in a 1951 Willys, inspect each tire for cracking, cuts, bulges, exposed cords, uneven wear, and signs of age-related separation. Check inflation pressures cold, look closely at valve stems, and inspect the spare with the same seriousness as the four tires on the ground. On a vehicle of this age, one weak spare or one neglected stem can end a trip just as quickly as a bad casing.

Tires are only part of the pre-drive picture, but they are the easiest place to catch trouble before leaving home. After the tire check, give the Willys a broader once-over that matches its age: brakes, steering, wheel-bearing feel, and fluid condition all matter on a vintage road trip. A careful inspection makes the drive more relaxed and helps you spot problems while they are still small.