1973 Opel 1900 Tires

The 1973 Opel 1900 uses two primary tire sizes: 165R13 in radial construction and 600-13 in bias-ply construction. Both are 13-inch fitments, but they follow different sizing systems and represent different tire-construction approaches on the car.

The practical choice is confirming which setup your Opel currently has or which direction you want to take it. A car staying true to a traditional bias-ply presentation may point toward 600-13, while a radial-equipped car may call for 165R13. Wheel width, overall tire proportions, and clearance should all be checked before changing from one construction or size format to the other.

Both primary tire sizes used on the 1973 Opel 1900 are built around a 13-inch rim diameter. That applies to the 165R13 radial fitment and the 600-13 bias-ply fitment, so wheel diameter remains consistent even though the tire constructions differ.

Rim diameter is only part of the picture, so it helps to verify wheel width as well before selecting a tire. The available 165R13 products use wider wheel-width ranges than the 600-13 bias-ply products, which makes that measurement especially important if the car has replacement wheels or an older set of rims with uncertain specifications.

600-13 is a vintage numeric bias-ply size. The 600 designation refers to an approximate 6.00-inch nominal section-width class, and the 13 indicates the tire fits a 13-inch rim. On the 1973 Opel 1900, it is the bias-ply fitment option rather than the radial one.

That size format matters because it does not translate directly to a modern metric radial without comparison. Buyers looking at 600-13 should decide whether they want to keep the traditional bias-ply construction or consider one of the recognized radial equivalents. Either way, the wheel setup and the car's available clearance should be reviewed before making a change.

For the 1973 Opel 1900, 600-13 is a bias-ply tire size. The model also uses a separate radial fitment path in 165R13, so the two sizes are tied not just to different size codes, but to different construction types as well.

That distinction affects both appearance and fitment planning. A bias-ply 600-13 keeps the traditional vintage sizing format, while a radial choice moves the car into a different construction approach. Before changing from one to the other, confirm the wheel width, compare the intended tire dimensions carefully, and check steering and body clearance on the actual car.

Radial equivalents for 600-13 include 165R13 as an 80-series metric radial, P165/75R13 as a 75-series P-metric radial, and P175/70R13 as a 70-series P-metric radial. Those are the recognized radial alternatives associated with the 600-13 bias-ply size on the 1973 Opel 1900.

Each equivalent represents a different sizing convention and profile family, so the decision is not simply choosing any radial with a 13-inch rim. The 4-5 inch rim-width range tied to these equivalents is an important checkpoint, and the car should also be inspected for wheel compatibility and clearance before moving away from the original-style bias-ply setup.

That depends on how the 1973 Opel 1900 is being kept and used. The car has a 600-13 bias-ply fitment path and a 165R13 radial fitment path, so either choice starts with selecting the construction style that matches the wheel setup and the owner's goals.

A bias-ply tire supports a more traditional vintage presentation, while a radial may better suit an owner who wants a later-style tire format on the car. The key is not treating the two paths as automatic substitutes. Wheel width, physical clearance, and the condition of suspension and steering components should all be reviewed before converting from one construction type to the other.

Start with the correct primary size and construction: 165R13 for the radial path or 600-13 for the bias-ply path. From there, the meaningful differences are wheel-width compatibility, brand, tire series, sidewall appearance, and whether the car is being kept in a restoration-oriented style or driven with a radial setup in mind.

A 165R13 buyer may focus on blackwall radial choices from Michelin or Dunlop, while a 600-13 buyer may compare BFGoodrich whitewall styles within a classic bias-ply series. The best way to narrow the choice is to match the tire to the car's current wheels, the look you want, and the kind of road use the Opel is expected to see.

Available sidewall styles for the 1973 Opel 1900 include blackwall in the 165R13 radial fitment and both narrow whitewall and wide whitewall in the 600-13 bias-ply fitment. That means sidewall appearance changes along with size and construction, rather than being a simple cosmetic option within one exact tire type.

Blackwall radials tend to support a clean European touring look, while the whitewall bias-ply choices create a more traditional vintage presentation. Sidewall style should be chosen after the correct size and construction have been settled, because the visual difference is meaningful but still secondary to getting the wheel fitment and intended tire type right.

Michelin and Dunlop are available in the 165R13 radial size for the 1973 Opel 1900, while BFGoodrich is available in the 600-13 bias-ply size. The brand mix follows the two fitment directions, so comparing brands also means comparing construction, series, and tire style.

That matters because a Michelin or Dunlop option is part of the radial path, while BFGoodrich supports the classic bias-ply path with whitewall presentation choices. Rather than trying to rank brands, focus on whether the tire belongs to the correct size family for your car, then compare its series character, sidewall treatment, and wheel-width requirements.

A period-style 1973 Opel 1900 can be approached in two ways depending on the presentation you want. The 600-13 bias-ply size creates the more traditional vintage look, while 165R13 reflects the car's radial fitment path and suits an owner preserving a later-era European-style tire appearance.

Appearance should be balanced against the car's current wheels and how closely the restoration follows a particular build or market configuration. When exact originality matters, marque-specific references and historical documentation are worth checking. For many owners, the practical decision is choosing the tire that best matches the car's intended visual character without overlooking fitment basics.

Tire construction changes the visual character of a restored 1973 Opel 1900 more than many buyers expect. A 600-13 bias-ply gives the car a more traditional vintage stance and opens the door to narrow or wide whitewall styling, while a 165R13 radial keeps the look more restrained and European with blackwall presentation.

That visual difference often shapes the entire restoration impression, especially on a compact imported sedan where tire proportions are easy to notice. Construction choice should still be grounded in wheel compatibility and intended use, but from an appearance standpoint, deciding between bias-ply and radial is one of the clearest ways to influence the car's final personality.

Yes, modifications can affect tire fitment on a 1973 Opel 1900 even when the tire still uses the correct 13-inch rim diameter. Aftermarket wheels, wheel-width changes, suspension work, ride-height changes, or body alterations can all influence how a 165R13 radial or 600-13 bias-ply sits and clears the car.

That is why an Opel with non-original wheels should be measured before a tire is chosen only by size code. Check the actual rim width, look for clearance at the fenders and steering components, and verify that nothing rubs through the full range of motion. Small imported cars can be especially sensitive to changes in wheel and tire proportions.

Before driving a 1973 Opel 1900 on new tires, inspect the wheels for correct diameter and width, confirm the tires are seated properly, and make sure inflation is set appropriately for the tire being used. It also helps to check basic alignment-related wear items and confirm there is no visible interference at the fenders or steering components.

A short, careful test drive is a smart next step, especially if the car has been parked for long periods or recently changed from bias-ply to radial construction. Pay attention to rubbing, pull, vibration, and air loss after the first miles. Collector cars often need a broader once-over because aging suspension and brake components can affect tire behavior.

Collector-car tire maintenance for a 1973 Opel 1900 starts with regular pressure checks, visual inspection, and attention to age-related condition. Whether the car runs 165R13 radials or 600-13 bias-ply tires, look for cracking, cuts, bulges, uneven wear, and any signs of slow air loss before putting the car back on the road.

Storage conditions matter almost as much as mileage on a low-use Opel. Keeping the car away from prolonged sunlight, heat, moisture, and ozone sources helps protect the tires over time. It is also wise to inspect the spare, monitor tread and sidewall condition seasonally, and have any questionable tire or wheel checked by a qualified professional before extended driving.