2021 BMW 3 Series Tire Size Factory tire sizes, bolt pattern & tire pressure

Tire Sizes

225/45R18, 225/40R19, 255/35R19

Bolt Pattern

5x112

Offset

27-45

Tire Pressure

35/38 PSI

Tire Sizes by Trim

Trim	Tire Size	Bolt Pattern	Pressure (F/R)
330i	225/45R18	5x112	35/38 PSI
330i xDrive	225/45R18	5x112	35/38 PSI
M340i/M340i xDrive	225/40R19 , 255/35R19	5x112	35/38 PSI

Tire Specifications for 2021 BMW 3 Series

Overall Diameter

659.7 mm

26"

Section Width

225 mm

8.9"

Sidewall Height

101.3 mm

Circumference

2072.5 mm

Revs/Mile

777

Rim Diameter

18"

View full 225/45R18 specifications & alternatives →

Alternative Tire Sizes

These sizes are within 3% diameter of the factory 225/45R18 and may fit the 2021 BMW 3 Series.

285/40R17 Safe 0.0% diff 295/30R19 Safe 0.0% diff 195/65R16 Safe 0.0% diff 175/65R17 Safe 0.1% diff 325/35R17 Safe 0.1% diff 305/25R20 Safe 0.1% diff 155/65R18 Safe 0.1% diff 185/55R18 Safe 0.1% diff

Related Comparisons

215/55R17 vs 225/45R18 Midsize sedan sport upgrade 215/50R17 vs 225/45R18 Midsize sedan rim upgrade 245/35R19 vs 255/35R19 Performance width upgrade 255/35R19 vs 275/30R20 Performance plus-one aggressive 225/45R18 vs 235/40R18 Wider with lower profile 225/45R18 vs 235/45R18 Width upgrade on 18-inch 225/45R18 vs 245/40R19 Sport sedan plus-one wider

Other BMW 3 Series Years

2025 BMW 3 Series 225/45R18, 255/40R18, 225/40R19, 255/35R19 2024 BMW 3 Series 225/45R18, 255/40R18, 225/40R19, 255/35R19 2023 BMW 3 Series 225/45R18, 255/40R18, 225/40R19, 255/35R19 2022 BMW 3 Series 225/45R18, 255/40R18, 225/40R19, 255/35R19 2020 BMW 3 Series 225/45R18, 225/40R19, 255/35R19

About 2021 BMW 3 Series Tires

The 2021 BMW 3 Series uses different tire sizes depending on trim. The bolt pattern is 5x112 with a center bore of 66.6mm, and the recommended offset range is 27-45mm.

Factory recommended tire pressure is 35 PSI (front) and 38 PSI (rear). Always check the tire pressure when tires are cold for the most accurate reading. The tire pressure placard is located on the driver's door jamb.

If you're looking to change tire sizes, the alternatives listed above are within 3% of the factory diameter and should be compatible without modifications. Always verify fender clearance before installing larger tires.