2021 Mercedes-Benz C-Class Tire Size Factory tire sizes, bolt pattern & tire pressure

Tire Sizes by Trim

Alternative Tire Sizes

These sizes are within 3% diameter of the factory 225/45R18 and may fit the 2021 Mercedes-Benz C-Class.

Related Comparisons

Tire Maintenance Tips for the Mercedes-Benz C-Class

Proper tire maintenance extends tire life and keeps your 2021 Mercedes-Benz C-Class safe on the road. Follow these guidelines from NHTSA:

• Check tire pressure monthly — the Mercedes-Benz C-Class requires 36/39 PSI (front/rear). Check when tires are cold, before driving.
• Rotate tires every 5,000–7,500 miles — this ensures even wear across all four tires, especially important for vehicles with staggered setups.
• Inspect tread depth regularly — the legal minimum is 2/32", but most experts recommend replacing tires at 4/32" for adequate wet traction.
• Check the DOT date code — tires older than 6 years should be inspected by a professional, regardless of tread depth. The 4-digit DOT code on the sidewall shows the week and year of manufacture.

Choosing Alternative Tires

When replacing tires on your 2021 Mercedes-Benz C-Class, stay within 3% of the factory tire's overall diameter to avoid affecting your speedometer accuracy, ABS calibration, and traction control. The factory bolt pattern (5x112) and offset (30-52) must also match.

Always verify any alternative size with a qualified tire professional before purchase. For more information on tire safety, see the NHTSA Tire Ratings Search.

Other Mercedes-Benz C-Class Years