1981 Renault Tire Fitment Guide

1981 Renault vehicles use three sizes: 145R13 for the LeCar, plus 155R13 and 175/70R13 for the R18i. All three are radial 13-inch sizes, so the wheel diameter is consistent across the year and make even though the section width and profile vary by model. Rim-width guidance appears on some products, with 145R13 fitting 4.00 to 5.00-inch rims, 155R13 fitting 4.00 to 5.50-inch rims, and 175/70R13 fitting 4.5 to 6.0-inch rims.

The practical takeaway is that a 1981 Renault buyer should identify the model first and then verify the exact size on the car’s wheels or sidewall before choosing a tire. LeCar owners have one straightforward size to match, while R18i owners need to confirm whether their car uses the taller 155R13 format or the lower-profile 175/70R13.

On a 1981 Renault, 145R13 is a Euro-metric radial size. The 145 refers to nominal section width in millimeters, the R denotes radial construction, and the 13 is the wheel diameter in inches. Because no aspect ratio is printed, this format conventionally corresponds to an 80-series profile, which is typical of small European cars from the period.

That matters most for a 1981 Renault LeCar, since 145R13 is the size associated with that model. It is a narrow, tall-profile radial that preserves the compact stance and proportions Renault intended. When comparing products, pay attention to the full sidewall marking because speed rating and rim-width guidance can differ from one 145R13 tire to another.

On a 1981 Renault, 175/70R13 is a modern-style metric radial code that spells out more detail than 145R13 or 155R13. The 175 is the section width in millimeters, 70 is the aspect ratio, R indicates radial construction, and 13 is the wheel diameter in inches. That makes it a wider, lower-profile tire than the tall-profile Euro-metric 13-inch sizes used elsewhere in the range.

For a 1981 Renault R18i, this size should be treated as its own exact fitment rather than as a casual substitute for 155R13. The wheel diameter matches, but the tire’s width and profile are different enough to affect clearance, stance, and appearance. Confirm the size already fitted to the car and verify wheel width before making a change.

No. The 1981 Renault LeCar uses 145R13, while the 1981 Renault R18i uses either 155R13 or 175/70R13. All three sizes are 13-inch radials, but they are not interchangeable simply because the rim diameter matches. Width and sidewall profile change from one size to the next, and the fitment split follows the model line.

That means year and make are only the starting point for a 1981 Renault tire search. LeCar owners can focus on one size, but R18i owners should verify the exact sidewall marking on the car, check wheel width, and decide whether they are preserving an existing fitment or returning the car to a more original-style configuration.

That choice only applies to the 1981 Renault R18i, since the LeCar uses 145R13. Both R18i sizes are radial 13-inch fitments, but they are different sizes rather than two names for the same thing. The 155R13 is a taller Euro-metric format, while the 175/70R13 is a wider metric size with an explicit 70-series profile.

The best approach is to match the size your R18i is already set up to use unless you are doing broader fitment research with wheel-width and clearance checks. Owners who want the traditional tall-profile European-sedan look often gravitate toward 155R13, while those needing the exact lower-profile fitment should stay with 175/70R13. Treat the car’s existing size marking and wheel measurements as your first checkpoints.

1981 Renault tires in 145R13, 155R13, and 175/70R13 are available in blackwall form. That applies across the LeCar and R18i fitments covered here, regardless of brand. No whitewall variation appears within these sizes, which aligns with the clean, contemporary small-car look typical of early-1980s European imports sold in the U.S.

For most owners, that makes the sidewall decision simple: blackwall is the natural visual fit for a 1981 Renault. It suits both a stock restoration and a well-kept driver without introducing an era mismatch. Once sidewall appearance is settled, the more important buying decision becomes choosing the exact size that belongs on your LeCar or R18i.

1981 Renault fitments are covered by Michelin and Firestone in 145R13, Michelin and Dunlop in 155R13, and Avon in 175/70R13. Every one of those offerings is a radial blackwall built around a 13-inch wheel. Michelin appears in both Euro-metric sizes, while Firestone, Dunlop, and Avon each cover a specific part of the Renault size range.

Brand choice matters most after the size is settled. LeCar owners can compare Michelin and Firestone within 145R13, while R18i owners can compare Michelin and Dunlop in 155R13 or move to Avon if their car requires 175/70R13. Looking at the complete sidewall marking, speed rating, and wheel-width guidance will tell you more than the brand name alone.

Both the Michelin XAS-FF and Firestone F560 serve the 145R13 size used on the 1981 Renault LeCar, and both are blackwall radials for 13-inch wheels. The Michelin carries a 145HR13 74H TL marking, while the Firestone is marked 145R13 and includes a 4.00 to 5.00-inch rim-width range with a maximum load figure of 825 pounds at 44 psi. Their published weights also differ, with the Michelin at 18 pounds and the Firestone at 12.7 pounds.

For a buyer, that means these two 145R13 tires share the same basic fitment but are not identical in how they are specified. The sidewall marking, speed rating language, and rim-width guidance deserve a close look before making a final decision. LeCar owners should compare those details against the wheels on the car and the kind of use the car will actually see.

Rim-width guidance varies by size on 1981 Renault applications. The 145R13 tires with published fitment details suit 4.00 to 5.00-inch rims, 155R13 suits 4.00 to 5.50-inch rims, and 175/70R13 suits 4.5 to 6.0-inch rims. All of these sizes mount on 13-inch wheels, but the acceptable wheel-width range expands as the tire gets wider.

That is why wheel diameter alone is not enough when sorting out Renault fitment. A tire can match the wheel’s 13-inch diameter and still be wrong for the wheel’s width. Before choosing among R18i sizes in particular, verify the wheel width on the car so the tire’s section width and profile are working within the manufacturer’s intended range.

The 1981 Renault tires covered here are tubeless where the sidewall marking makes tube status explicit. The 145R13 Michelin XAS-FF and 155R13 Michelin XAS both carry TL markings, which identify them as tubeless tires. No tube-type marking appears in these Renault sizes, and none of the available products use a TT designation.

Even with tubeless tires, the wheel itself still matters on an older import. Check the condition of the wheel bead seat, make sure the valve stems are fresh, and confirm that the wheel is appropriate for tubeless use. If your car has older wheels with questionable sealing surfaces, a hands-on inspection by a shop familiar with vintage European cars is a wise step.

All 1981 Renault tire sizes in this group use a 13-inch wheel diameter, so the basic rim diameter is shared across the LeCar and R18i range. That said, 145R13, 155R13, and 175/70R13 do not call for the same wheel-width range. A wheel that accepts one of the narrower sizes is not automatically the right width for the widest size.

Original wheels can often remain in service when the replacement tire matches the size range the wheel was meant to carry. The safest route is to confirm the wheel width on the car and compare it to the tire manufacturer’s approved range for the exact size you plan to use. That is especially important if an R18i is moving between 155R13 and 175/70R13.

A 1981 Renault stores best in a cool, dry, dark space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment. The radial tires used on the LeCar and R18i generally tolerate storage better than old-style bias-ply tires, but they still age from heat, ultraviolet exposure, and long periods of static loading. Keeping the tires clean and properly inflated helps reduce stress while the car is parked.

For a collector Renault that sits for long stretches, move the car periodically or support it in a way that reduces prolonged load on one footprint. That helps prevent flat spotting and keeps the tire casing from taking a set. If the car will be stored for a season, include the spare in the same inspection and inflation routine as the road tires.

Tires on a 1981 Renault should be judged more by age and condition than by mileage. A low-use collector car can wear very little tread yet still need attention as the rubber ages, with many owners starting careful evaluations around the five- to seven-year mark and treating ten years as a serious replacement threshold. The DOT date code on the sidewall is the best quick reference for age when it is present.

That matters because LeCars and R18is often spend more time parked than driven. A tire that looks acceptable at a glance may still have hardened rubber, internal aging, or sidewall cracking that makes it less trustworthy. If the date code is getting old, have the tires inspected with the same seriousness you would give brake hoses or fuel lines on an early-1980s import.

Tires on a 1981 Renault deserve a quick inspection before every drive and a more thorough look before any longer outing. Check inflation, tread wear, sidewall cracking, bulges, cuts, and whether the tire is holding air consistently. Because these are older collector vehicles, it is also smart to look closely at valve stems and the spare tire’s condition, not just the four tires on the ground.

That routine matters more on a lightly used vintage car than on a modern commuter, because problems can develop while the car is sitting still. Catching a crack, a slow leak, or a damaged valve stem in the garage is far better than finding it on the roadside. Build the inspection into your normal pre-drive habit whenever the Renault comes out.

A 1981 Renault LeCar would have been delivered in the radial era, and 145R13 is the size associated with that model here. For an early-1980s European subcompact, a narrow blackwall radial is entirely in character with how the car was sold and used. Michelin and Firestone both offer that size, but original-equipment brand application could vary by market and production details.

If originality matters, focus first on matching the LeCar’s correct size, radial construction, and overall blackwall appearance. That will usually matter more visually than chasing a specific brand name unless you have factory literature or period photos for your exact car. Marque clubs and original brochures are the right next step when a concours-level restoration is the goal.

Yes. On a 1981 Renault, judges and knowledgeable enthusiasts will notice whether the car wears the right size family, the proper radial construction for the era, and a sidewall style that fits an early-1980s European import. A LeCar wearing 145R13 blackwall radials presents differently from an R18i on 155R13 or 175/70R13, and mixing those sizes casually can look out of place.

For show use, the details that usually matter most are model-correct sizing and an appearance that matches the period. A blackwall radial is the natural visual direction for this year and make, but exact judging standards can vary from one club or event to another. Before a high-level show, compare your tire choice against period photography and event-specific rules.

Both of these tires fit the 155R13 size used on the 1981 Renault R18i, and both are blackwall radials built for 13-inch wheels. The Michelin is marked 155HR13 78H TL and carries a published rim-width range of 4.00 to 5.50 inches, while the Dunlop is marked 155R13 78H and carries a maximum load figure of 937 pounds. Each weighs 20 pounds, but their published sidewall markings emphasize slightly different details.

For a restoration-minded R18i owner, the choice comes down to which specification profile best suits the car and the level of authenticity you want in the finished look. Compare the exact sidewall marking, wheel-width guidance, and overall visual character rather than assuming every 155R13 radial presents the same way. Those small differences can matter when the car is being prepared for display.

1981 Renault tires in these sizes are radial designs, and the products carrying explicit speed ratings use the H designation, which corresponds to 130 mph. That is far beyond ordinary U.S. highway speed, so the tire’s published speed ceiling is not usually the limiting factor in normal touring use. On a car of this age, the bigger real-world factors are the condition of the suspension, brakes, steering, alignment, and the age of the tires themselves.

A healthy set of properly fitted radials can make a 1981 Renault very usable on modern roads, but only when the rest of the car is equally sound. Before sustained highway driving, verify inflation, inspect for age cracking, and make sure the car tracks straight without vibration. A fresh tire cannot compensate for tired wheel bearings, worn shocks, or old brake components.

Inflation pressure on a 1981 Renault should follow the vehicle manufacturer’s recommendation first, then be checked against the tire manufacturer’s sidewall information for the exact tire in use. Published load-and-pressure figures vary by size and product: one 145R13 carries 825 pounds at 44 psi, while one 155R13 carries 937 pounds. Those figures describe the tire’s rated capacity at a stated maximum pressure, not a one-size-fits-all setting for every Renault.

Use the owner’s manual or factory placard as the baseline for road pressure, then confirm that your chosen tire is being used within its intended operating range. Do not transfer a pressure figure from a LeCar tire to an R18i tire, or from one product line to another, just because the wheel diameter matches. Small cars are sensitive to overinflation and underinflation alike.

Before a longer drive in a 1981 Renault, inspect all four tires and the spare for cracking, cuts, bulges, embedded debris, uneven wear, and correct inflation. Confirm that the sidewall size on the car matches the intended fitment for your LeCar or R18i, and make sure the valve stems are in good condition. Because these cars are now well into collector age, a tire check should be part of a broader look at brakes, coolant hoses, belts, fluids, and lights.

That pre-drive routine is especially important on a Renault that is driven occasionally rather than daily. Tires can age quietly in storage, and an old spare or weak valve stem can turn a minor issue into a trip-ending problem. A few minutes in the garage before departure is usually enough to catch the kind of age-related trouble vintage European cars can hide.