1951 Willys Jeepster 473 & 673 Tires

The 1951 Willys Jeepster 473 & 673 uses a 640-15 tire size. That is a numeric bias-ply format, and it is the primary fitment for this vehicle on a 15-inch rim. The covered Base sub-model uses the same size, so there is not a split in primary fitment across the listed configuration.

That makes the next decision more about tire type and appearance than about choosing between multiple primary sizes. Once the wheel diameter is confirmed, the owner can compare blackwall, narrow whitewall, and wide whitewall versions in 640-15, or look at radial-equivalent alternatives separately if the goal is a different driving feel with a similar overall fitment approach.

The primary tire fitment for a 1951 Willys Jeepster 473 & 673 is built around a 15-inch rim. The 640-15 size itself confirms that wheel diameter, and the applicable products for this fitment are also built for 15-inch wheels. That rim diameter is the foundation for both the original-style bias-ply size and the available radial equivalents.

Rim diameter should be checked on the vehicle before any tire is selected, especially on an older Jeepster that may have seen wheel changes over the years. Rim width matters too, since some 640-15 products are paired with narrower wheel ranges than others, and the radial-equivalent options call for a 5- to 6-inch rim-width range.

A 640-15 size is a vintage numeric bias-ply designation. The 640 represents an approximate nominal section width of 6.40 inches, and the 15 refers to the wheel diameter in inches. On the 1951 Willys Jeepster 473 & 673, that means a traditional postwar tire format rather than a modern metric radial size.

Understanding that format helps when comparing original-style tires to radial alternatives. A 640-15 keeps the Jeepster in its proper era of sizing and construction, while sizes such as 175R15 or P175/75R15 belong to later radial sizing systems. The size code alone does not settle interchangeability, so wheel width and vehicle clearance still need to be confirmed.

For the 1951 Willys Jeepster 473 & 673, 640-15 is a bias-ply tire size. That is the primary fitment format associated with this vehicle, and the available 640-15 products are bias-ply offerings across several brands and sidewall treatments. The size is rooted in the vintage numeric sizing system used during the Jeepster's era.

That matters because bias-ply and radial tires differ in construction, appearance, and the way an older vehicle may feel on the road. Owners aiming for a traditional presentation often stay with 640-15 bias-ply tires, while those considering a radial alternative should treat that as a separate fitment decision and verify wheel width, overall dimensions, and clearance carefully.

Radial equivalents for 640-15 include 175R15 as the 80-series metric radial option, P175/75R15 as the P-metric 75-series radial option, and P185/70R15 as the P-metric 70-series radial option. These sizes provide three different radial-format comparison points for owners of a 1951 Willys Jeepster 473 & 673 considering an alternative to the original-style bias-ply fitment.

The practical difference is that each equivalent follows a different sizing convention and profile family, so the choice is not simply radial versus bias-ply. A recommended rim-width range of 5 to 6 inches is part of that evaluation, and the final check should include the actual wheel dimensions, the vehicle's ride height and clearance, and the intended look of the finished Jeepster.

Start with the basics: confirm that the Jeepster still has 15-inch wheels, measure the actual rim width, and compare the radial-equivalent size you are considering against the vehicle's available space. For a 640-15 replacement path, the radial options are 175R15, P175/75R15, and P185/70R15, with a recommended rim-width range of 5 to 6 inches.

The next step is checking the vehicle as it sits rather than assuming a stock setup. Older vehicles may have replacement wheels, suspension work, or body changes that affect fitment. Steering clearance, fender clearance, and the condition of springs and suspension components should all be reviewed before making the switch from a period-style bias-ply tire to a radial alternative.

The first priority is staying with the correct primary size, 640-15, if the goal is a traditional bias-ply fitment for the 1951 Willys Jeepster 473 & 673. After that, the main variables are sidewall style, brand, tire series, rim-width compatibility, and whether published load figures match the vehicle's intended use and road expectations.

A Jeepster used mainly for shows or period-style presentation may call for a different visual choice than one driven regularly on local roads. Whitewall width can change the character of the vehicle noticeably, and rim-width specifications vary slightly among products, so the actual wheel should be checked before narrowing the choice to a specific 640-15 tire.

In 640-15 for the 1951 Willys Jeepster 473 & 673, available sidewall styles include blackwall, narrow whitewall, and wide whitewall. That gives the owner a wide visual range, from a more understated blackwall presentation to broader whitewall treatments that emphasize the Jeepster's early-1950s character and open-body styling.

The right choice depends on the look the vehicle is meant to carry rather than on fitment alone, since these styles are available within the same basic size family. Whitewall width should be chosen thoughtfully because it can change the vehicle's overall stance and restoration impression, even when the tire size and construction remain the same.

Available 640-15 tires for the 1951 Willys Jeepster 473 & 673 come from BFGoodrich, Firestone, Avon, and Excelsior. Those choices span several classic-style tire lines, including Silvertown Classic Bias Ply, Firestone Classic Bias Ply, Super Safety Crossply, and Excelsior Bias Ply, giving the owner more than one path within the proper vintage size.

Brand selection should be treated as part of the overall package rather than the only decision. Some products differ by sidewall presentation, some by rim-width specification, and some by listed weight or load figure. Comparing those details alongside the desired period look will usually be more useful than choosing a brand name first and working backward.

A period-style starting point for a 1951 Willys Jeepster 473 & 673 is the original-format 640-15 bias-ply tire size. That keeps the Jeepster in the proper vintage sizing system and preserves the tall, traditional look associated with early-1950s American tires. Within that size, blackwall and whitewall versions provide different visual directions without leaving the correct fitment family.

The best appearance choice depends on how the vehicle is being restored and presented. Some owners prefer a restrained blackwall look, while others want the stronger visual statement of a narrow or wide whitewall. When exact historical originality matters, it is worth checking marque-specific references or restoration documentation before choosing a particular sidewall treatment.

Tire construction changes more than road feel on a restored 1951 Willys Jeepster 473 & 673; it also changes visual character. A 640-15 bias-ply keeps the vehicle in its original-era construction style, which tends to suit the Jeepster's postwar proportions and period presentation. Radial equivalents move the tire choice into a later sizing and construction approach.

That does not make one choice automatically right or wrong, but it does make the restoration goal important. Owners prioritizing a traditional display presence often stay with bias-ply construction, while owners focused on road use may evaluate radial alternatives more closely. Either way, the wheel setup and the finished stance of the vehicle should guide the final decision.

Yes, modifications can affect tire fitment on a 1951 Willys Jeepster 473 & 673 even when the intended tire size is correct on paper. Aftermarket wheels, changes in rim width, suspension alterations, ride-height changes, or body repairs can all influence how a 640-15 bias-ply tire or a radial equivalent sits and clears the vehicle.

That is why the actual Jeepster should be checked before final tire selection, especially if its history is not fully known. Wheel diameter and width should be confirmed first, then steering clearance, fender clearance, and suspension condition should be reviewed. Older specialty vehicles often look stock while carrying changes that matter once a new set of tires is mounted.

Before driving a 1951 Willys Jeepster 473 & 673 on new tires, inspect the wheels, valve stems, and overall mounting condition, then make sure the tires are inflated appropriately for the application. It is also wise to check steering movement lock to lock, look for interference at the fenders and suspension, and confirm that all four tires match the intended fitment plan.

A collector vehicle deserves a broader road-readiness check as well. Brake condition, wheel fastener torque, suspension wear, and signs of uneven ride height can all influence how the new tires behave once the Jeepster is moving. A short, careful test drive followed by another visual inspection helps catch rubbing, air loss, or setup issues early.

640-15 tires on a collector 1951 Willys Jeepster 473 & 673 should be maintained with regular pressure checks, routine visual inspection, and attention to age-related condition even when tread wear is low. Collector vehicles often spend long periods parked, which makes sidewall cracking, flat spotting, and unnoticed air loss more important than mileage alone.

Storage conditions matter almost as much as driving habits. Keeping the Jeepster away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires between outings. It is also smart to inspect for cuts, bulges, and irregular wear before each drive, since an older vehicle may see seasonal use rather than the constant checks that daily drivers receive.