Introduced as Subaru’s three-row family SUV, the 2019 Subaru Trucks Ascent was built to handle daily driving, long highway trips, and changing weather with the balanced road manners buyers expect from a modern Subaru. That makes tire selection less about vintage-style construction and more about matching the exact wheel setup on the vehicle. The 2019 Subaru Trucks Ascent uses radial tires in either 245/60R18 or 245/50R20, depending on sub-model and wheel package. The main choice is confirming whether your Ascent is on 18-inch or 20-inch rims, then comparing available tire designs within the correct size. That keeps fitment, appearance, and road use aligned with how the vehicle is actually equipped.
Which Tire Size Is Right for The 2019 Subaru Trucks Ascent
The 2019 Subaru Trucks Ascent uses two primary tire sizes, and the difference comes down to sub-model and wheel diameter. Some versions use 245/60R18 on an 18-inch rim, while others use 245/50R20 on a 20-inch rim. Before choosing a tire, the first step is confirming the exact sub-model and verifying whether the vehicle is currently equipped with 18-inch or 20-inch wheels.
245/60R18 is a metric radial size in which 245 identifies the nominal section width in millimeters, 60 is the aspect ratio, R indicates radial construction, and 18 is the rim diameter in inches. On the 2019 Subaru Trucks Ascent, this size supports a modern SUV fitment with the taller sidewall profile associated with the 18-inch wheel setup. It is the relevant size for Ascent configurations equipped with 18-inch rims rather than the 20-inch package. This is the size to evaluate when maintaining the vehicle’s existing 18-inch wheel fitment and overall tire proportions.
245/50R20 is also a metric radial size, with a 245-millimeter nominal section width, a 50-series aspect ratio, radial construction, and a 20-inch rim diameter. On the 2019 Subaru Trucks Ascent, this size belongs to versions equipped with the larger 20-inch wheel package and carries a lower-profile look than the 18-inch fitment. It is not simply an alternate labeling of the same wheel size, so wheel diameter confirmation matters before selection. This is the correct starting point when the vehicle is already set up on 20-inch rims.
Tire fitment on the 2019 Subaru Trucks Ascent varies by sub-model, and one trim level can be found with either of the two primary sizes. Checking the exact sub-model matters because the decision is tied directly to whether the vehicle uses an 18-inch or 20-inch wheel setup.
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2019 Subaru Trucks Ascent Base
The 2019 Subaru Trucks Ascent Base uses the 245/60R18 radial tire size. For this sub-model, the main priority is staying with the correct 18-inch fitment and choosing a tire that matches the wheel size and intended road use.
The 2019 Subaru Trucks Ascent Limited uses the 245/50R20 radial tire size. Tire selection for this sub-model starts with confirming the 20-inch wheel package, then comparing tires within that lower-profile size rather than treating the 18-inch option as interchangeable.
The 2019 Subaru Trucks Ascent Premium can use either 245/50R20 or 245/60R18, depending on how the vehicle is equipped. That makes wheel confirmation especially important, because the correct tire choice depends on the actual rim diameter currently on the vehicle.
The 2019 Subaru Trucks Ascent Touring uses the 245/50R20 radial tire size. The practical takeaway is straightforward: confirm the existing 20-inch wheels and choose within that size rather than comparing it directly to the 18-inch fitment used on other Ascent configurations.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Frequently Asked Questions
Owners of a 2019 Subaru Trucks Ascent usually need to confirm the correct tire size by sub-model and wheel diameter first. The questions below focus on fitment, 18-inch versus 20-inch rim setups, tire selection, and the checks worth making before regular road use.
Tire Size & Fitment
What tire size fits a 2019 Subaru Trucks Ascent?
The 2019 Subaru Trucks Ascent uses either 245/60R18 or 245/50R20, depending on the sub-model and wheel package. Both are radial tire sizes, but they are not the same fitment because one is built for an 18-inch rim and the other is built for a 20-inch rim.
The practical step is to confirm the exact trim and then verify the wheel diameter currently on the vehicle. Base models use 245/60R18, Limited and Touring use 245/50R20, and Premium can appear with either size, so the correct choice depends on the actual wheel setup rather than the model name alone.
What size rim does a 2019 Subaru Trucks Ascent use?
A 2019 Subaru Trucks Ascent uses either an 18-inch or 20-inch rim, depending on tire size and sub-model. The 245/60R18 tire fits an 18-inch rim, while the 245/50R20 tire fits a 20-inch rim, so rim diameter is a direct part of the fitment decision.
Checking the rim size before ordering tires prevents the most common fitment mistake on this vehicle. A quick look at the tire sidewall or wheel setup will usually confirm whether the Ascent is on 18s or 20s, and that should be matched before comparing tread design, brand, or other tire characteristics.
Do all 2019 Subaru Trucks Ascent sub-models use the same tire size?
No, the 2019 Subaru Trucks Ascent does not use one tire size across every sub-model. Base uses 245/60R18, Limited and Touring use 245/50R20, and Premium can use either 245/60R18 or 245/50R20 depending on the wheel package installed.
That variation means trim name alone is not always enough, especially on a Premium model. Matching the tire to the wheel diameter already on the vehicle is the safest way to narrow the choice, and it also helps avoid confusion when a used Ascent may have had its wheels changed since new.
Choosing the Right Tire
What should I consider when choosing a tire for a 2019 Subaru Trucks Ascent?
Start with the correct size: 245/60R18 for 18-inch setups or 245/50R20 for 20-inch setups. Since the 2019 Subaru Trucks Ascent uses radial tires in both cases, the key decision is not construction type but making sure the tire matches the vehicle’s actual wheel diameter and intended use.
After size is confirmed, compare tires based on how the Ascent is driven, such as everyday commuting, family travel, or mixed seasonal use. It also helps to verify that the vehicle has not been changed with different wheels or suspension parts, because those changes can affect clearance and narrow the practical choices.
How do I choose between 245/60R18 and 245/50R20 tires for a 2019 Subaru Trucks Ascent?
The choice is not a matter of preference alone, because 245/60R18 and 245/50R20 are tied to different rim diameters. A 2019 Subaru Trucks Ascent with 18-inch wheels needs 245/60R18, while one with 20-inch wheels needs 245/50R20, so the wheel already on the vehicle decides the starting point.
Once the correct wheel size is confirmed, compare tires only within that size category. That keeps the fitment process focused and helps avoid mismatching tires to the rim, while also making it easier to judge which option best suits the Ascent’s ride expectations, appearance, and everyday road use.
Why does the 2019 Subaru Trucks Ascent Premium have more than one tire size?
The 2019 Subaru Trucks Ascent Premium can be found with either 245/60R18 or 245/50R20 because that sub-model appears with more than one wheel setup. Both sizes are radial fitments, but each belongs to a different rim diameter, so they serve different equipment configurations rather than being duplicate listings.
That matters most when replacing tires on a used vehicle, where the current wheel package may not be obvious from trim name alone. Looking directly at the existing sidewall marking or confirming the actual wheel diameter will settle the question quickly and keep the replacement choice aligned with the vehicle’s present setup.
Restoration & Appearance
Does correct tire fitment matter for a 2019 Subaru Trucks Ascent restoration?
Yes, correct tire fitment still matters even though the 2019 Subaru Trucks Ascent is a modern vehicle rather than a traditional restoration-era collector car. The right starting point is using the proper radial size for the wheel package on the vehicle, whether that is 245/60R18 or 245/50R20.
Appearance is part of that equation because the 18-inch and 20-inch fitments create different sidewall proportions and visual character. Anyone trying to preserve the vehicle’s original overall look should confirm the trim and wheel setup first, then choose a replacement tire that stays consistent with that factory-style presentation.
How does tire size affect the appearance of a 2019 Subaru Trucks Ascent?
Tire size changes the visual balance of the 2019 Subaru Trucks Ascent because 245/60R18 and 245/50R20 use the same nominal width but different sidewall proportions and different wheel diameters. The 18-inch fitment presents more sidewall, while the 20-inch fitment gives the vehicle a larger-wheel, lower-profile look.
That visual difference is one reason not to treat the two sizes as interchangeable choices for appearance alone. Matching the tire to the wheel package already on the vehicle keeps the Ascent looking properly proportioned, and it also avoids creating fitment questions that go beyond simple styling preference.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Subaru Trucks Ascent?
Yes, modifications can affect tire fitment on a 2019 Subaru Trucks Ascent even when the original tire size is known. Changes such as aftermarket wheels, altered wheel offset, suspension lowering, or non-stock ride-height components can influence how a 245/60R18 or 245/50R20 tire sits in the wheel opening.
That is why the current setup should be checked before replacing tires on any modified vehicle. Wheel diameter, wheel width, and clearance at the fender and steering angles all matter, and those details become especially important if the Ascent no longer carries the same wheel package it originally used.
What should I inspect before driving a 2019 Subaru Trucks Ascent on new tires?
Before regular road use, inspect the wheel and tire package for the correct size, proper installation, and stable air pressure. It also makes sense to look over the wheels for damage and confirm that the tires have clear space at the fenders, suspension components, and full steering range where applicable.
A quick follow-up check after the first miles is worthwhile, especially if the vehicle has aftermarket wheels or recent suspension work. Watching for vibration, uneven contact, or unexpected rubbing helps catch setup issues early and gives the new tire package a better chance to wear and perform as intended.
How often should tires on a 2019 Subaru Trucks Ascent be inspected?
Tires on a 2019 Subaru Trucks Ascent should be inspected regularly rather than waiting for a problem to appear. Routine checks should include tread condition, air pressure, cuts, bulges, sidewall damage, and any signs of uneven wear that might point to alignment, suspension, or wheel issues.
Inspection becomes even more important if the vehicle sits for long periods or sees seasonal use, since low-use vehicles can still develop age-related concerns. Keeping a close eye on condition between longer trips also helps confirm that the Ascent’s tire size, wheel setup, and road-use demands are staying in sync.
