The 2019 BMW Trucks X4 blends coupe-like roofline styling with the taller stance and all-weather versatility buyers expect from a modern BMW crossover. In this generation, tire fitment plays a bigger role than usual because the X4 appears with both square and staggered setups depending on the exact sub-model and wheel package. Primary sizes here are all radial, spanning 19-, 20-, and 21-inch applications, so the first decision is identifying the exact configuration on the vehicle. From there, the choice shifts to sidewall style, tire series, and road-use priorities, while keeping wheel diameter, front-to-rear sizing, and overall appearance in balance.
Which Tire Size Is Right for The 2019 BMW Trucks X4
The 2019 BMW Trucks X4 uses five primary tire sizes, and the right one depends on the exact sub-model and whether the vehicle carries a square or staggered front-and-rear setup. Rim diameter matters immediately here, since fitments span 19-, 20-, and 21-inch wheels. Before comparing tires, confirm whether the X4 is an xDrive30i or M40i and check whether the vehicle is running matching sizes at all four corners or wider rear tires.
245/50R19 is a metric radial size in which 245 identifies nominal section width in millimeters, 50 is the aspect ratio, and 19 is the wheel diameter in inches. On the 2019 BMW Trucks X4, this size serves square-fitment applications and keeps the vehicle in a conventional modern radial format. Available choices center on BFGoodrich lines such as g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A, all in Blackwall form. This size is the one to evaluate when the vehicle has 19-inch wheels and the same tire size at each corner.
245/40R21 is a metric radial size with a 245-millimeter nominal section width, a 40-series profile, and a 21-inch rim diameter. For the 2019 BMW Trucks X4, this size belongs on the front of certain staggered M40i setups, where it works with a wider rear tire rather than a matching square arrangement. Its role is less about broad product-style choice here and more about preserving the correct front sizing relationship on a 21-inch package. Use this size only after confirming that the vehicle actually carries the 21-inch staggered front wheel setup.
245/45R20 is a metric radial size in which 245 gives the nominal width in millimeters, 45 is the aspect ratio, and 20 is the wheel diameter. On the 2019 BMW Trucks X4, it appears as a front fitment on certain staggered setups and also as a square-size reference on some configurations. Product choice is broader here, with BFGoodrich, Nitto, and Pro-Trac offerings across g-Force and Street Pro III series, plus Blackwall, Redline, and RWL sidewall treatments. This size deserves close attention if the X4 wears 20-inch wheels and appearance matters as much as road behavior.
275/35R21 is a metric radial size with a 275-millimeter nominal section width, a 35-series profile, and a 21-inch rim diameter. On the 2019 BMW Trucks X4, this is a rear tire size used with a narrower 21-inch front tire in a staggered arrangement rather than as a stand-alone all-around fitment. Its practical meaning is maintaining the intended front-to-rear balance of a 21-inch package instead of substituting by width alone. Choose this size only after confirming the rear wheel diameter and making sure the vehicle is using the matching staggered setup.
275/40R20 is a metric radial size where 275 indicates nominal width in millimeters, 40 is the aspect ratio, and 20 is the wheel diameter in inches. On the 2019 BMW Trucks X4, it serves as the rear tire on staggered 20-inch applications and carries the wider rear footprint of that setup. Available choices include BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac, with Blackwall, Redline, and RWL sidewall styles plus series ranging from g-Force to Drag Radial and Street Pro III. This is the size to examine when the X4 has 20-inch staggered fitment and a wider rear wheel.
Sub-model fitment matters on the 2019 BMW Trucks X4 because some versions use a square setup while others use distinct front and rear sizes. Confirming the exact sub-model and wheel package is the key first step before comparing tire series, sidewall treatments, or replacement options.
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2019 BMW Trucks X4 M40i
The 2019 BMW Trucks X4 M40i appears with a 245/50R19 radial square setup in one configuration. That makes tire selection more straightforward, but wheel diameter and any later wheel-package changes still need to be verified before choosing among available tire lines.
The 2019 BMW Trucks X4 M40i Front uses either 245/40R21 or 245/45R20 depending on the wheel package. Front tire selection here must stay tied to the matching rear size and the actual wheel diameter already on the vehicle.
The 2019 BMW Trucks X4 M40i Rear uses either 275/35R21 or 275/40R20 as part of a staggered radial setup. Rear tire choice should be made with the corresponding front size in mind so the overall package remains consistent.
The 2019 BMW Trucks X4 xDrive30i uses a 245/50R19 radial tire in one square-fitment configuration. That keeps the sizing decision simple, then shifts attention to tire series, rim compatibility, and the vehicle's actual wheel setup if it has been changed from stock-style fitment.
The 2019 BMW Trucks X4 xDrive30i Front uses 245/45R20 in its staggered 20-inch arrangement. Tire selection at the front should be matched carefully to the rear size already on the vehicle rather than treated as an independent fitment.
The 2019 BMW Trucks X4 xDrive30i Rear uses 275/40R20 as the wider rear tire in a staggered radial setup. Choosing within this size means balancing the intended look and tire series with the need to preserve the correct front-to-rear relationship.
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.
Best 2019 BMW Trucks X4 Tires for Sale
Available 2019 BMW Trucks X4 tire choices focus on radial fitments from BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster. Depending on size, buyers can compare g-Force, Street Pro III, NT555 G2, and Drag Radial offerings, along with Blackwall, Redline, and RWL sidewall styles.
These FAQs focus on exact 2019 BMW Trucks X4 tire sizing, front-to-rear fitment differences, wheel diameter, available radial tire choices, sidewall treatments, and the checks that matter before road use.
Tire Size & Fitment
What tire size fits a 2019 BMW Trucks X4?
The 2019 BMW Trucks X4 uses 245/50R19, 245/45R20, 275/40R20, 245/40R21, and 275/35R21 depending on the exact sub-model position and wheel package. Some configurations use a square setup with the same size at all four corners, while others use a staggered arrangement with a narrower front tire and a wider rear tire.
The practical step is to confirm more than the model name on the liftgate. Check the sub-model, verify whether the vehicle has 19-, 20-, or 21-inch wheels, and confirm whether the front and rear sizes match or differ before choosing a replacement tire.
What size rim does a 2019 BMW Trucks X4 use?
A 2019 BMW Trucks X4 can use 19-inch, 20-inch, or 21-inch rims depending on the tire size and configuration. The 245/50R19 size uses a 19-inch rim, the 245/45R20 and 275/40R20 sizes use 20-inch rims, and the 245/40R21 and 275/35R21 sizes use 21-inch rims.
Rim diameter is the first measurement to verify because none of these tire sizes cross over between wheel diameters. A quick sidewall check usually settles the question, and it is especially important on an X4 that may have been fitted with a different wheel package after it left the showroom.
Why does the 2019 BMW Trucks X4 have more than one tire size?
The 2019 BMW Trucks X4 has more than one tire size because fitment changes by sub-model and wheel package. Some versions use a square setup such as 245/50R19, while others use staggered combinations with one size up front and a wider companion size at the rear on 20-inch or 21-inch wheels.
That means tire selection starts with identifying the exact configuration rather than picking by model name alone. A buyer should confirm the sub-model, inspect all four tires, and make sure the front and rear wheel diameters match the intended replacement size before comparing brands or sidewall styles.
Choosing the Right Tire
What should I consider when choosing a 2019 BMW Trucks X4 tire?
Start with the exact tire size already assigned to the vehicle's wheel package, then confirm whether the X4 uses a square or staggered setup. From there, compare construction, rim-width suitability where stated, sidewall appearance, weight, and any load figure tied to the specific tire you are considering.
Selection also depends on how the vehicle is used. A Blackwall performance-style tire gives one look, while Redline or RWL options on certain 20-inch sizes create a very different presentation, so matching the tire to both the wheel setup and the X4's intended role matters.
What sidewall styles are available for 2019 BMW Trucks X4 tires?
Sidewall style depends on size. Blackwall is available across the applicable 19-inch and performance-oriented 20-inch choices, while the 245/45R20 and 275/40R20 sizes also appear with Redline and RWL sidewall treatments through Pro-Trac Street Pro III offerings.
That makes sidewall selection part of the overall visual decision, not just a sizing decision. A buyer looking for a cleaner modern appearance may lean toward Blackwall, while Redline or raised white letter styling can change the character of a 20-inch X4 without changing the primary size.
What brands offer tires for the 2019 BMW Trucks X4?
Tires for the 2019 BMW Trucks X4 are available from BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster, depending on the size. BFGoodrich covers much of the 19-inch and 20-inch selection, Nitto appears in 20-inch fitments, Pro-Trac adds appearance-oriented options, and M&H Racemaster appears in 275/40R20.
Brand comparison should still come after fitment confirmation. Once the exact size and wheel package are settled, the useful differences become tire series, sidewall treatment, rim-width range where stated, and whether the vehicle's use is more street-focused or centered on a specialty rear-tire application.
Restoration & Appearance
Which tire should I choose for a period-style 2019 BMW Trucks X4?
A period-style look on a 2019 BMW Trucks X4 starts with keeping the correct modern radial size for the exact wheel package already on the vehicle. From there, the most visible choice is usually sidewall presentation, especially on the 20-inch fitments where Blackwall, Redline, and RWL options are available.
Because this is a late-model performance crossover rather than a vintage restoration platform, appearance usually means preserving the intended stance and front-to-rear sizing relationship more than recreating an earlier era. Keeping the correct diameter and staggered or square layout matters more than chasing a dramatic visual change.
How does tire construction affect the appearance of a restored 2019 BMW Trucks X4?
On a 2019 BMW Trucks X4, construction does not create a bias-ply-versus-radial visual decision because the primary fitments here are radial throughout. Appearance differences come more from sidewall style, tread character, and whether the vehicle keeps its original-type square or staggered layout.
That shifts the visual focus to details such as Blackwall versus Redline or RWL on applicable 20-inch sizes. Keeping the correct front and rear sizing relationship usually does more to preserve the X4's intended look than changing from one radial series to another within the same fitment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 BMW Trucks X4?
Yes. Wheel changes, altered offsets, suspension lowering, spacer use, or body modifications can all affect tire fitment on a 2019 BMW Trucks X4 even when the sidewall size looks correct. That matters even more on staggered 20-inch and 21-inch setups where front and rear widths already differ by design.
A modified X4 should be checked for wheel diameter, wheel width, clearance at full steering lock, and clearance through suspension travel before replacement tires are chosen. Matching the original size code alone does not settle fitment if the wheels or ride height have changed.
What should I inspect before driving a 2019 BMW Trucks X4 on new tires?
Before road use, inspect the wheels for damage, confirm that the installed tire size matches the correct front or rear position, and verify that air pressure is set appropriately for the tire and vehicle. It also helps to check tread seating, valve condition, and any signs of rubbing after installation.
An X4 with staggered sizing deserves an extra walk-around because front and rear tires are not always interchangeable. A short initial drive followed by a recheck for clearance, unusual noise, and stable air retention helps confirm that the replacement setup is behaving as expected.
How often should tires on a 2019 BMW Trucks X4 be inspected?
Tires on a 2019 BMW Trucks X4 should be inspected regularly for uneven wear, cuts, punctures, bulges, and cracking, especially if the vehicle sees seasonal use or long idle periods. Air pressure should also be checked routinely, since underinflation or unnoticed air loss can affect handling and wear.
A staggered setup makes inspection even more important because front and rear tires may wear differently and cannot always be rotated in the same way as a square arrangement. Looking over the tires before longer drives and after any suspension or wheel change is a sensible habit.
