2018 Alfa Romeo Trucks Tire Fitment Guide

2018 Alfa Romeo Trucks vehicles use four tire sizes: 235/60R18, 235/55R19, 255/45R20, and 285/40R20. All four sizes apply to the Stelvio, but they do not all fit the same wheel. The 235/60R18 mounts on an 18-inch rim, the 235/55R19 mounts on a 19-inch rim, and both 255/45R20 and 285/40R20 mount on 20-inch rims. For 255/45R20, compatible product fitments span an 8.0- to 9.5-inch rim width range.

The practical takeaway is that year and make alone are not enough for a correct match on 2018 Alfa Romeo Trucks. You need to confirm which Stelvio wheel package is on the vehicle now, especially if it has changed hands or received aftermarket wheels. Checking the sidewall on the current tires, the wheel diameter stamping, and the door-jamb tire placard will usually point you to the correct starting size before you narrow down brand or sidewall preference.

On a 2018 Alfa Romeo Trucks tire, 235/55R19 is a metric radial size. The 235 is the section width in millimeters, 55 is the aspect ratio, meaning the sidewall height is 55 percent of the section width, R means radial construction, and 19 is the wheel diameter in inches. On the Stelvio, that code identifies one of the factory-style 19-inch fitments rather than a universal size used across every wheel package.

Reading the code correctly matters because a 19-inch tire cannot substitute for an 18-inch or 20-inch wheel package even if the vehicle model is the same. If your Stelvio currently wears 235/55R19, that size should guide your search unless you are changing wheels as a complete package. Buyers comparing sizes should think of this code as a wheel-and-tire pairing, not just a tread choice.

No. 2018 Alfa Romeo Trucks includes one model core here, the Stelvio, but that model was fitted with several tire sizes depending on wheel package: 235/60R18, 235/55R19, 255/45R20, and 285/40R20. The 20-inch fitments also split into different widths, so even two Stelvios on 20-inch wheels may not use the same size at every position.

That means identifying the model is only the first step; the wheel package matters just as much. A buyer looking at replacement tires should verify the size on the vehicle before comparing brands, while someone restoring a Stelvio to a factory appearance may also want to confirm the original wheel-and-tire combination from the vehicle's build information. Treat the current sidewall code as the fastest checkpoint before choosing a replacement.

2018 Alfa Romeo Trucks tire choices in the 255/45R20 size include both Blackwall and raised white letter sidewall styles. BFGoodrich and Nitto options in that size use a Blackwall appearance, while Pro-Trac offers an RWL version. All of those are radial tires, so the visible sidewall treatment becomes more of an appearance decision than a construction decision within that size.

For a Stelvio, Blackwall is the more contemporary OEM-style look and will usually align best with the vehicle's original presentation. Raised white letters create a more assertive, enthusiast-oriented appearance that some owners prefer on custom or more individualized builds. If appearance matters as much as fitment, decide on sidewall style early, because it can narrow the field even when the size itself stays the same.

2018 Alfa Romeo Trucks fitments in 255/45R20 are available from BFGoodrich, Nitto, and Pro-Trac. BFGoodrich appears in both g-Force COMP-2 A/S and g-Force Sport COMP-2 form, Nitto offers the NT555 G2, and Pro-Trac offers the Street Pro III. All of those are radial choices built around the 20-inch Stelvio application.

Brand selection matters most after you have confirmed the correct size, because the Stelvio uses more than one wheel diameter. Buyers who want a more understated modern look may lean toward Blackwall offerings, while those chasing a more distinctive side profile may consider the RWL option. Once the size is settled, compare sidewall appearance, load marking, and intended driving use rather than choosing by brand name alone.

For 2018 Alfa Romeo Trucks in 255/45R20, the BFGoodrich g-Force Sport COMP-2 and Nitto NT555 G2 share a radial, W-rated 20-inch format aimed at modern performance driving. The BFGoodrich carries a 101W marking with a published max load figure of 1,819 pounds at 51 psi, while the Nitto is marked 255/45ZR20XL 105W and uses an XL designation. Their published weights are also very close, at 32 pounds for the BFGoodrich and 31.97 pounds for the Nitto.

That means the decision is less about basic fitment and more about the specific load marking, sidewall presentation, and tire character you want on your Stelvio. If you are comparing two products in the same size, pay close attention to the exact sidewall code, the XL marking where present, and the manufacturer's intended use for that series. Those details matter more than small weight differences when the size itself is already correct.

Rim width guidance is available for 2018 Alfa Romeo Trucks in the 255/45R20 size, where compatible products fit 8.0- to 9.5-inch-wide rims. That range applies to the 20-inch diameter wheel paired with the 255/45R20 tire and gives a useful benchmark for owners confirming whether an existing wheel falls within an approved width span.

Rim width matters because the correct tire size can still behave poorly if the wheel is too narrow or too wide for the tire's intended profile. Before replacing tires on a Stelvio with aftermarket wheels, verify both the wheel diameter and the actual wheel width. If the wheel width sits outside the approved range for the tire you want, the right answer is to change the tire choice or the wheel, not force a mismatch.

The available 2018 Alfa Romeo Trucks products in 255/45R20 are radial performance tires with modern size markings and no tube-type designation. That points to tubeless use for the products offered in this size, which aligns with how a 2018 Stelvio was designed from the factory. The other Stelvio sizes on this page are also radial fitments rather than vintage tube-type applications.

Even so, the wheel itself still needs to be in proper tubeless condition. If a Stelvio has damaged bead seats, corrosion, or aftermarket wheels of uncertain quality, those issues should be corrected before mounting new tires. Tube use is not a substitute for a wheel in poor condition on a modern performance SUV, so inspection of the wheel and valve hardware should happen at the same time as tire replacement.

No. Original 2018 Alfa Romeo Trucks Stelvio wheels were matched to specific tire diameters, and the sizes here span 18-, 19-, and 20-inch rims. A 235/60R18 belongs on an 18-inch wheel, a 235/55R19 belongs on a 19-inch wheel, and the 255/45R20 and 285/40R20 belong on 20-inch wheels. Tire diameter code and wheel diameter must agree exactly.

What sometimes does overlap is use within the same diameter family, but that still does not make every same-diameter tire automatically interchangeable. Width, load index, and front-to-rear fitment strategy all matter, especially on a modern SUV with performance intent. If you are reusing original Stelvio wheels, confirm the wheel diameter first, then confirm whether the exact tire size matches that wheel's width and the vehicle's intended position.

A 2018 Alfa Romeo Trucks should be stored on clean, properly inflated tires in a cool, dry space away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment. UV exposure and ozone are two of the biggest long-term enemies of modern radial sidewalls. If the vehicle will sit for extended periods, rolling it occasionally helps prevent flat spotting and keeps the contact patch from carrying the same load month after month.

Owners who store a Stelvio seasonally should also pay attention to the floor surface and the condition of the spare. Tire cradles or clean barriers under the tires can help on cold concrete, and a simple monthly pressure check goes a long way toward protecting the casing. Good storage habits preserve ride quality and sidewall appearance, which matters just as much on a modern collectible as it does on an older classic.

Tires on a 2018 Alfa Romeo Trucks should be judged by age as much as tread depth. A sensible collector-vehicle rule is to begin evaluating them closely at around five to seven years of service and to treat roughly ten years from the DOT date code as a point where replacement deserves serious consideration, even if the tread still looks usable. That is especially true on a performance-oriented SUV like the Stelvio, where grip and casing integrity matter.

Low annual mileage can be misleading because a tire can age out long before it wears out. Buyers and owners should inspect the DOT date code, compare tire age side to side, and look for hardening, cracking, or vibration that suggests age-related decline. If a Stelvio still wears older tires with decent tread, age is often the deciding factor rather than mileage.

Tires on a 2018 Alfa Romeo Trucks deserve a quick inspection before every drive and a more thorough inspection before any extended highway outing. Look for pressure loss, sidewall cracking, cuts, punctures, bulges, uneven tread wear, and anything lodged in the tread. On a Stelvio, where handling balance is part of the experience, even minor wear irregularities can change how the vehicle feels on the road.

A fuller inspection every few months should also include checking the inside sidewalls, valve stems, and wheel lips for damage or corrosion. If the vehicle has been parked for a while, take a close look before bringing it back into regular use. Frequent inspections are inexpensive insurance on any collector-minded Alfa, and they often catch age or alignment issues before they become a roadside problem.

Yes, 2018 Alfa Romeo Trucks tires in the available 255/45R20 products are suitable for normal highway use when they are in good condition, correctly inflated, and matched to the proper wheel. The 255/45R20 choices shown here carry W speed ratings, which correspond to a maximum speed capability of 168 mph under rated conditions. That far exceeds ordinary U.S. highway speeds, so real-world safety depends more on tire age, inflation, alignment, and overall vehicle condition than on the speed symbol alone.

For a Stelvio, highway confidence comes from the whole package working together: healthy tires, straight wheels, sound suspension, and brakes in proper condition. A high speed rating is not a license to ignore age cracking, impact damage, or underinflation. Before sustained road use, verify that the tire size, load index, and condition all make sense for the specific vehicle and how it is being driven.

Inflation pressure for 2018 Alfa Romeo Trucks should follow the vehicle's factory placard or owner's manual for normal service, because that pressure is tuned to the Stelvio's weight distribution and intended handling. One 255/45R20 option, the BFGoodrich g-Force Sport COMP-2 in 101W, carries a published maximum load of 1,819 pounds at 51 psi. That figure is a tire rating limit, not a blanket recommendation to run every Stelvio tire at 51 psi.

The important distinction is between recommended operating pressure and the tire's maximum-rated pressure under maximum load conditions. If you change tire brand or load index within the same size, keep using the vehicle placard as the baseline unless the tire manufacturer directs otherwise for a special application. Never transfer a pressure figure from one size to another or from one product family to the entire 2018 Alfa Romeo Trucks range.

Before a longer drive in a 2018 Alfa Romeo Trucks, inspect each tire for cracking, cuts, bulges, punctures, exposed cords, uneven wear, and proper cold inflation pressure. Check the valve stems, make sure the wheels are free of visible damage, and confirm that the spare is usable if the vehicle carries one. On a Stelvio, where multiple wheel packages exist, it is also smart to verify that all four road tires match the intended size and rating strategy for the vehicle.

A tire check should be part of a broader pre-trip routine that includes brakes, fluids, battery condition, and suspension health. If the vehicle has been sitting, take a short local drive first and watch for vibration or pull before committing to a long run. That extra time can reveal a tire issue early, when it is still an inconvenience instead of a roadside interruption.