Renault R18i Tires

Renault R18i uses three tire sizes across the 1981 through 1986 model run: 155R13, 175/70R13, and 185/70R13. The 155R13 size is listed for every year from 1981 to 1986. The wider companion size is 175/70R13 for 1981 through 1983, then 185/70R13 for 1984 through 1986. All three sizes use a 13-inch rim diameter and radial construction in the available tire offerings.

That means year is the first sorting point, but it should not be the only one. A Renault R18i owner should also confirm the size currently on the car, check the wheel width, and compare that wheel to the tire’s approved rim-width range where one is given. If the car has been changed over the years, the size on the sidewall and the actual wheel dimensions matter more than assumptions about what should be there.

On a Renault R18i, 155R13 is a euro-metric radial size. The 155 refers to the tire’s section width in millimeters, the R indicates radial construction, and the 13 is the wheel diameter in inches. Unlike a later metric size such as 175/70R13 or 185/70R13, this format does not show the aspect ratio in the shorthand size itself, even though it is still a radial passenger-car tire.

That matters because 155R13 is the base size used across the entire Renault R18i production span in this model group. If your car wears that narrower fitment, compare the tire’s rim-width recommendation to your wheels before choosing a replacement. It is also wise to check the door-jamb decal, owner literature, or long-retained service records if your car has had wheel or tire changes during its life.

A 1981 Renault R18i has two tire sizes listed because that year used both the narrow 155R13 size and the wider 175/70R13 size. Both are 13-inch radial fitments, so the split is not about a wheel diameter change or a bias-versus-radial change. It is a same-year fitment split between two radial sizes that share the same rim diameter.

For a car from 1981, the practical job is to identify which configuration your Renault R18i actually carries today. Start by reading the sidewall on the existing tires, then measure or confirm wheel width if there is any doubt. When two sizes appear in the same year and both fit the same rim diameter family, the safest path is to match the size the car was set up to use rather than choosing solely by appearance.

A 1984 Renault R18i falls in the later half of the model run, where the listed sizes are 155R13 and 185/70R13. The earlier 175/70R13 size applies to 1981 through 1983 instead. Both 1984 sizes use 13-inch wheels, but they represent different section widths and proportions, so reading the existing tire and checking wheel width are both important.

The most useful approach is to confirm three things together: the model year, the tire size already mounted if the car has been stable for years, and the wheel dimensions. That helps separate an original-style setup from a later change made by a previous owner. If the car is being restored, compare your findings with factory literature or marque-club guidance so the chosen tire matches the way your particular Renault R18i was equipped.

Renault R18i tire offerings include several sidewall styles depending on size and tire series. Blackwall is the most common style across 155R13, 175/70R13, and 185/70R13. In 185/70R13, additional styles include a redline and a 2 inch wide whitewall. That gives later-size Renault R18i owners more appearance choices than the narrower sizes.

For most original-style Renault R18i restorations and driver cars, blackwall will be the most natural visual fit for the era. Redline or wide whitewall options can make sense when a buyer wants a period-customized look rather than a strictly factory-style appearance. Since those alternate sidewall styles appear only in 185/70R13 here, confirm that your car actually uses that later wider size before selecting on appearance alone.

Renault R18i tire choices here come from Michelin, Dunlop, Avon, BFGoodrich, and Vredestein. Michelin appears in 155R13 and 185/70R13, Dunlop appears in 155R13 and 185/70R13, Avon appears in 175/70R13 and 185/70R13, BFGoodrich appears in 185/70R13, and Vredestein appears in 185/70R13. That gives the later 185/70R13 size the broadest brand coverage.

Brand choice matters most after the correct size has been established. Once you know whether your Renault R18i needs 155R13, 175/70R13, or 185/70R13, you can compare available sidewall style, tread character, and rim-width compatibility within that size. Owners seeking a closer period-European look often focus on blackwall offerings, while those building a more personalized car may prioritize the distinctive sidewall options available in the later wider size.

Renault R18i tire offerings include Michelin XAS-FF, SP Sport Aquajet, CR6ZZ, Silvertown Radial, Sport Classic, Michelin XDX-B, and Sprint Classic. All are radial tires, but they represent different period-style approaches, sidewall treatments, and brand families within the same general era. Some series are available only in blackwall form, while Silvertown Radial in 185/70R13 also appears with redline and wide whitewall styling.

For a Renault R18i owner, the right series depends on the intended character of the car. A stock-appearing restoration usually leans toward blackwall radial choices, while a personalized build may use the more decorative sidewall treatments available in 185/70R13. Once the size is confirmed, compare each series for wheel-width suitability and the visual effect you want, since appearance differences are one of the clearest distinctions in this group.

A Renault R18i should be stored on clean, properly inflated tires in a cool, dry, dark environment away from direct sunlight, electric motors, welders, heaters, and ozone sources. Long stationary periods can flat-spot radial tires, especially on a light-use collector car that sits for weeks or months at a time. Clean concrete is acceptable, though mats or tire cradles can help reduce long-term contact stress.

Move the Renault R18i periodically if possible, or support the car in a way that follows the suspension and chassis needs of the vehicle. Keep fuel, solvents, and dressings off the sidewalls, and do not let one tire carry the same load in the same position for an entire season. Good storage habits preserve ride quality and sidewall condition far better than trying to correct storage damage later.

Tires on a Renault R18i should be visually checked before every drive and inspected more thoroughly several times each season if the car is used regularly. A proper inspection includes inflation pressure, sidewall cracking, tread separation signs, irregular wear, impact damage, and valve-stem condition. Collector cars often age their tires by time and storage conditions rather than by miles alone.

That inspection routine matters even more if your Renault R18i is driven infrequently, because problems can develop quietly while the car is parked. Look closely at both sidewalls, not just the outward-facing one, and inspect the inner shoulder for rubbing or clearance issues if a wider size is fitted. Catching a pressure loss or sidewall defect early is far easier than dealing with roadside trouble in a vintage car.

A Renault R18i tire should be replaced whenever it shows cracking, hardening, bulges, vibration related to internal damage, repeated pressure loss, or any sign of separation, even if tread depth still looks usable. Collector tires can age out long before they wear out. Calendar age, storage history, heat exposure, and long periods of inactivity all matter as much as visible tread on a low-mile Renault R18i.

Use tread depth as only one part of the decision. If the tire’s age is uncertain, have the Renault R18i tires inspected by a professional familiar with vintage and classic applications, especially before touring use. Replacement is usually the wiser choice when a tire’s structural condition is in doubt, because an older radial can look presentable while already losing the flexibility and internal integrity needed for reliable road service.

Renault R18i uses 155R13 throughout 1981 to 1986, with a wider alternate size of 175/70R13 for 1981 to 1983 and 185/70R13 for 1984 to 1986. The available replacement tire series include Michelin XAS-FF, SP Sport Aquajet, CR6ZZ, Silvertown Radial, Sport Classic, Michelin XDX-B, and Sprint Classic. That tells you the Renault R18i belongs to a radial-tire era, but more than one correct-looking replacement approach exists within the listed sizes.

For a judged restoration, the exact original tire choice should be confirmed from period owner literature, factory materials, or marque-club references for the specific Renault R18i. Start with the correct size for the year, then narrow by sidewall appearance and overall period character. A blackwall radial will usually be the most authentic visual direction for this model, while decorative sidewalls are better treated as a styling preference than a default restoration assumption.

Correct tire fitment can affect both the presentation and the judged credibility of a Renault R18i. Size, sidewall style, and overall tire character all influence whether the car looks appropriately restored for its year and market position. A Renault R18i on the wrong width or profile may still drive acceptably, but it can look visibly out of step with the proportions expected on a well-sorted original-style car.

The biggest value to getting tires right is that they complete the stance of the car without drawing the wrong kind of attention. If your Renault R18i is intended for shows, club events, or resale to a collector-minded buyer, use the proper year-based size first and then choose a sidewall treatment that suits the car’s era. Marque clubs and period photography are often the best tiebreakers when several suitable radial options exist.

Blackwall is the most broadly appropriate sidewall style for a Renault R18i restoration from the available tire choices. Blackwall appears across all three listed sizes, while redline and wide whitewall options appear only in 185/70R13. Since Renault R18i is a late-classic European sedan rather than a 1950s American car, blackwall generally aligns best with a stock restoration look.

That said, sidewall style should follow the goal of the project. If the Renault R18i is being restored to factory-style presentation, blackwall is the safer visual choice. If the car is a personalized build and it uses 185/70R13, the redline or 2 inch whitewall options can create a distinct period-custom look, but they should be viewed as stylistic departures rather than the default restoration direction.

These Renault R18i tire choices are radial road tires in the correct 13-inch size family for the years listed, so they are intended for public-road use when they are properly fitted, correctly inflated, and in sound condition. Safety depends on matching the tire size to the car’s year and wheel, then making sure the tire itself has no age-related or service-related defects. A correct size alone does not make an older tire automatically roadworthy.

Before road use, inspect the entire tire and wheel package on the Renault R18i, including sidewalls, tread, valve stems, and wheel condition. If the car has sat for a long time, have the chassis, brakes, and alignment reviewed as well, since tire performance is only one part of safe operation. Even a properly chosen tire will not deliver good road manners if the suspension or braking system has been neglected.

Before driving a Renault R18i, check inflation pressure, sidewall condition, tread condition, wheel security, and any signs of rubbing or clearance problems. Make sure the tire size on the car matches one of the listed Renault R18i sizes for its year group, and confirm that all four tires are of compatible type and dimensions. On a collector-driven car, a quick pre-drive inspection catches many problems before they become failures.

It is also smart to look at how the Renault R18i sits after being parked. A tire that appears low, has developed a flat spot that does not roll out, or shows cracks at the shoulder deserves closer attention before the car leaves the garage. If you recently changed from the narrow size to a wider one within the approved year range, recheck steering clearance and general handling at modest speeds first.

A Renault R18i should be driven at speeds appropriate to the actual condition, age, and specification of the tires fitted, not simply the capability the car may have had when new. The available offerings include H- and V-rated radial tires in several sizes, but safe speed still depends on proper fitment, inflation, wheel condition, suspension condition, and whether the tires are fresh and structurally sound. An aged tire should never be treated like a new one just because the size is correct.

For practical use, bring a Renault R18i up to speed gradually after verifying that the car tracks straight and feels stable. Any vibration, pull, thump, or wandering sensation should be investigated before sustained higher-speed driving. A conservative approach is especially wise with a recently revived car, because tire age, storage history, and long dormant periods can matter as much as the performance potential suggested by the sidewall markings.