AC Typen Tires

AC Typen uses two tire sizes across 1951, 1952, and 1953: 185R16 and 670-16. Both sizes fit 16-inch rims, but they represent different construction approaches. The 185R16 options are radial tires, while the 670-16 options are bias-ply tires. That means the size choice is tied not only to dimensions, but also to how the car is intended to drive and present.

A restorer aiming for stronger period character will usually start by evaluating the 670-16 bias-ply fitment, while an owner who wants a more modern radial driving feel may focus on 185R16. Wheel width matters with radial fitment, so measure the actual wheels on the car and compare them with the published rim width range where given. If the car has a long ownership history, confirm whether it has already been converted from one tire type to the other.

670-16 is an older numeric bias-ply tire size used on AC Typen from 1951 through 1953. The 670 represents the nominal section width in the traditional inch-based sizing system with the decimal omitted, and the 16 identifies the rim diameter in inches. On this AC Typen application, available 670-16 products are bias-ply tires rather than radials.

That matters because a 670-16 tire gives the car a more period-correct appearance and handling character than a radial substitute. Bias-ply construction also affects ride, steering response, and how the car follows road surfaces. If your AC Typen still uses original-style wheels and you are preserving an authentic feel, 670-16 is the size to investigate first. A tube is required with this fitment, so the wheel and tube arrangement should be checked together.

A 1951 AC Typen has two tire sizes listed because the fitment split is by construction type rather than by wheel diameter. Both 185R16 and 670-16 use 16-inch rims, but 185R16 is a radial format and 670-16 is a traditional bias-ply format. The difference is therefore not simply one of size label, but of tire design and intended driving character.

The right choice depends on how your 1951 AC Typen is being restored or driven. If originality and period-correct behavior are the goal, the bias-ply route is often the better match. If the car has already been set up around radial use, the 185R16 options may be more appropriate. Check the current tires, the wheel widths, and any long-standing setup decisions on the car before replacing only one axle set or mixing assumptions from different eras.

AC Typen requires inner tubes when fitted with the listed 670-16 bias-ply tires. That requirement follows the construction and fitment style of the available bias-ply products in this size. The 185R16 radial listings are separate products in a different sizing system, so tube practice should not be assumed to be identical simply because the rim diameter is the same.

When replacing tires on an AC Typen, treat the tube decision as part of the whole wheel-and-tire package rather than an afterthought. Old tubes should not automatically be reused, especially on a collector car that has spent long periods parked. Wheel condition, valve stem fit, and the condition of the rim well all deserve attention at the same time. That is especially important if the car is transitioning from an old bias-ply setup to a fresh set of replacement tires.

AC Typen is listed with both bias-ply and radial tire options, both on 16-inch rims. The 670-16 choices are bias-ply, while the 185R16 choices are radial. That gives owners two valid directions: a more period-oriented bias-ply fitment or a radial fitment that reflects later tire technology while staying within the listed size range.

The best choice depends on the role of your AC Typen. Show-focused and authenticity-minded restorations often favor bias-ply because the construction looks and behaves more like an original-period installation. Drivers who want more settled highway behavior may lean toward radial tires. Before changing direction, inspect wheel width, suspension condition, and alignment so the tire choice supports the car rather than masking issues elsewhere in the chassis.

Yes, radial tires can change how an AC Typen feels on the road because radial construction flexes differently than bias-ply construction. On this application, the radial choice is 185R16, while the bias-ply choice is 670-16. Even though both use 16-inch rims, steering feel, ride compliance, and straight-line behavior can differ noticeably between the two construction types.

That difference can be welcome on a frequently driven AC Typen, but it also shifts the car away from a purely period feel. If the chassis has worn steering joints, old bushings, or marginal alignment, a new radial installation may highlight those issues rather than cure them. Plan the tire decision as part of a broader setup review. A sound suspension and correctly sized wheels are the foundation for getting the expected benefit from radial tires.

Mixing bias-ply and radial tires on an AC Typen is not a good practice. The listed AC Typen fitments separate clearly into 670-16 bias-ply and 185R16 radial options, and those two constructions behave differently under load, braking, and cornering. A mixed set can produce inconsistent handling traits that are especially noticeable on a lighter, more responsive collector car.

Choose one construction type and keep it consistent across the full AC Typen unless a qualified marque specialist has a very specific reason to do otherwise. That approach makes the car more predictable and keeps tire behavior balanced front to rear. If the car currently has mixed tires from an older partial replacement, treat a full matched set as part of the correction. It is one of the simplest ways to improve confidence without altering the basic character of the car.

A 1952 AC Typen can use either 185R16 or 670-16, and both are listed on 16-inch rims. The decisive checks are the tire construction you want to run, the wheel width on the car, and whether the car has long been set up around a bias-ply or radial fitment. Since both sizes appear in the same model year, year alone is not enough to make the decision.

Start by reading the size on the existing tires, then measure the wheel width and compare it with the published rim width range when available. If the car is a restoration, period photos, old service records, and club knowledge can help determine whether it should remain on bias-ply tires. If the car is a driver, think through whether you want authenticity of feel or a radial driving experience. Those practical choices matter as much as the number molded into the sidewall.

AC Typen tire options in the listed sizes come from Michelin, Avon, Vredestein, and Firestone. The 185R16 radial choices include Michelin X Radial, Avon Turbosteel, and Vredestein Sprint Classic. The 670-16 bias-ply choices include Firestone and Avon Turbospeed. That spread gives AC Typen owners access to both period-style and later-technology tire constructions from established specialty brands.

Brand choice should come after the basic fitment choice is settled. Once you know whether your AC Typen is staying with 670-16 bias-ply or moving with 185R16 radial, you can compare factors such as sidewall appearance, load specification, and wheel-width compatibility. On a collector car, consistency across the full set usually matters more than chasing small specification differences. A matched brand and construction approach tends to deliver the most coherent result in appearance and road feel.

The listed AC Typen tire options are not identified here as made-to-order products. Instead, the available entries are presented as standard catalog options within the two listed sizes, split between radial 185R16 and bias-ply 670-16. That means the main buying question for AC Typen is fitment correctness rather than a special build designation.

Even without a made-to-order label, collector-car tire selection still calls for care. AC Typen owners should verify the exact size, the 16-inch rim fitment, and whether the car is meant to stay with bias-ply character or radial behavior before replacing a set. It also helps to look at sidewall appearance so the finished result matches the car’s era and restoration goals. On a specialty car, getting the specification right matters more than choosing quickly.

An AC Typen should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, electric motors, welders, and ozone-producing equipment. Clean the tires gently, keep them free of petroleum residue, and maintain inflation at an appropriate level for storage rather than allowing the car to sit soft on the sidewalls. If the AC Typen is stored for long stretches, rolling it occasionally or supporting it correctly can help reduce flat spotting and stress.

Collector cars benefit from routine rather than long neglect. If your AC Typen is on bias-ply tires, storage habits matter even more because older-style constructions can take a set if left in one position for extended periods. A fitted car should also be checked for tube condition where tubes are used, since age-related deterioration is not always visible externally. Good storage preserves not just the tread, but also the casing shape and the car’s readiness for the next outing.

Tires on an AC Typen should be inspected before every drive and more thoroughly at regular service intervals, even if the car covers very few miles. Collector cars often age their tires by time and storage conditions rather than mileage alone. Look for sidewall cracking, tread separation signs, uneven wear, embedded debris, valve condition, and any loss of inflation. On bias-ply installations, also pay attention to tube-related issues and rim condition.

A short pre-drive inspection is especially worthwhile on an AC Typen because many collector cars spend more time parked than running. Check pressures when the tires are cold, and do not assume that a car that drove well last season is still ready today. If the car develops new vibration, pull, or steering wander, inspect the tires first before chasing more complicated mechanical causes. Small visual clues often appear before a roadside problem develops.

Tires on an AC Typen should be replaced when age, cracking, hardening, deformation, or other structural concerns appear, even if the tread still looks deep. Collector-car tires often age out long before they wear out. The same rule applies to both the 185R16 radial options and the 670-16 bias-ply options, though older-style bias-ply and tube-type arrangements deserve especially careful attention as they age.

Tread depth alone is a poor guide on a low-mileage AC Typen. If the car has spent years parked, has uncertain tire age, or shows any casing distortion, replacement becomes a maintenance decision rather than a mileage decision. It is also wise to inspect the spare, because an apparently unused spare may actually be the oldest tire on the car. Age-sensitive components such as tubes, valve stems, and rim strips should be evaluated at the same time.

AC Typen is represented here by two period-appropriate fitment directions: 670-16 bias-ply and 185R16 radial, both on 16-inch rims for the 1951 to 1953 years. The available series include Firestone Classic Bias Ply, Avon Turbospeed Mk4, Michelin X Radial, Avon Turbosteel CR6D, and Vredestein Sprint Classic. That means originality questions on AC Typen are not answered by size alone, because multiple construction approaches are associated with the model range.

For a specific AC Typen restoration, original car records, period photographs, and marque-club knowledge remain the best references for deciding which direction is right. A concours-oriented car may call for one answer, while a sympathetically upgraded road car may justify another. The important point is to restore the tire choice as part of the car’s broader character. Size, sidewall appearance, and construction type all influence whether the finished AC Typen feels historically coherent.

Correct tire fitment can absolutely affect how an AC Typen is judged and how seriously a restoration is received. Judges and knowledgeable enthusiasts often notice whether the tire size, construction type, and overall visual character suit the era and purpose of the car. On AC Typen, the distinction between 670-16 bias-ply and 185R16 radial can signal two very different restoration philosophies.

If the car is being prepared for formal judging, align the tire choice with the standards used by the event and by AC marque authorities. If the car is being restored for touring, the value question is broader and may favor a setup that supports reliable use while still looking appropriate. Either way, tires are not a cosmetic afterthought. They strongly influence stance, period correctness, and the credibility of the overall restoration.

On AC Typen, Firestone Classic Bias Ply and Michelin X Radial represent two different tire technologies rather than small variations within one format. Firestone Classic Bias Ply is offered in 670-16 and uses bias-ply construction, while Michelin X Radial is offered in 185R16 and uses radial construction. Both fit 16-inch rims, but they approach ride, handling character, and visual authenticity from different directions.

A buyer choosing between those series is really deciding what kind of AC Typen experience to preserve. The Firestone bias-ply route supports a more traditional look and period-style driving response. The Michelin radial route suits owners who want a later-technology feel while staying within a listed AC Typen fitment. The decision should match the car’s restoration goal, the wheel widths on the car, and whether historical fidelity or road-use behavior takes priority.

AC Typen tires can be suitable for public-road use when the correct size, construction type, and wheel fitment are chosen and the rest of the car is mechanically sound. The listed options include both 185R16 radial and 670-16 bias-ply tires, each with different driving characteristics. Public-road suitability depends not only on the tires themselves, but also on braking condition, steering wear, suspension health, and proper inflation.

A collector car should never be judged road-ready by tread alone. Before regular use, make sure your AC Typen has a matched set, wheels in proper condition, and no age-related tire defects. If the car has just been returned to service after a long lay-up, begin with shorter drives and reassess how it tracks, brakes, and rides. Careful recommissioning is part of safe tire use on any postwar specialty car.

Before driving an AC Typen, check cold tire pressure, visible sidewall condition, tread condition, valve stems, and any signs of cracking, bulging, or separation. Confirm that all four tires are the same basic construction type, either radial or bias-ply, and that the wheel fasteners and rims are in sound condition. If the car uses 670-16 bias-ply tires, include the tube-type setup in your inspection thinking as well.

A brief walkaround catches many problems before they become roadside failures. On an AC Typen, also pay attention to steering free play, brake feel, and whether the car sits level, since tire concerns and chassis issues often show up together. If anything feels different from the previous drive, investigate before heading farther from home. Collector cars reward slow, methodical checking much more than hurried departures.

The appropriate speed for an AC Typen depends on the exact tire fitted, its age, condition, and construction type rather than on the model name alone. A fresh, correctly fitted radial AC Typen setup and a period-style bias-ply setup will not feel the same at speed, even though both are listed for 16-inch rims. Whatever the tire type, collector-car road speed should remain within the car’s mechanical comfort zone and the tire’s service condition.

Practical road use starts with moderation. If your AC Typen is on bias-ply tires, expect a more vintage response and build speed gradually while monitoring tracking and stability. If it is on radial tires, do not let the improved feel tempt you to ignore the limitations of an older chassis and braking system. Smooth driving, proper inflation, and realistic cruising speeds are the right habits for preserving both safety and the character of the car.