2019 Mercedes-Benz CLA AMG CLA45
The 2019 Mercedes-Benz CLA AMG CLA45 tire size and wheel specifications below reflect standard OEM reference fitment data for this trim level.
Detailed tire and wheel breakdown for the 2019 Mercedes-Benz CLA
Tire geometry â 235/40R18
The 235/40R18 fitted to the 2019 Mercedes-Benz CLA has a section width of 235mm and an aspect ratio of 40%, mounted on a 18-inch rim. That gives a sidewall height of 94.0mm (3.70") and an overall outside diameter of 645.2mm (25.40"). At highway speed this tire completes roughly 493 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2019 Mercedes-Benz CLA while keeping the speedometer accurate, target a 245/33R19 (plus-one). For a softer ride or winter setup, a 225/47R17 (minus-one) keeps the overall diameter within Âą3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 2019 Mercedes-Benz CLA uses a 5x112 bolt pattern with a 66.6mm hub bore. Safe rim width range for the OEM tire is 7.5J â 8.5J, and offsets in the ET43 â ET53 window will clear suspension and fender without rubbing on most setups.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2019 Mercedes-Benz CLA is printed on the driver-side door jamb sticker â always defer to that value, not to the maximum pressure printed on the tire sidewall. Check pressure monthly and before long trips; under-inflation by 20% can reduce tread life by 25%.
Fitment Specifications
| Engine & Trim | Tire Size | Rim Size | Offset (ET) |
|---|---|---|---|
| AMG CLA45 | 235/40R18 | 18" x 8.0 | ET48 |
Frequently Asked Questions
What tire size does the 2019 Mercedes-Benz CLA AMG CLA45 use?
The 2019 Mercedes-Benz CLA AMG CLA45 uses 235/40R18 tires as standard equipment.
What is the bolt pattern of the 2019 Mercedes-Benz CLA AMG CLA45?
The 2019 Mercedes-Benz CLA AMG CLA45 has a 5x112 bolt pattern with a center bore of 66.6mm.
What is the wheel offset of the 2019 Mercedes-Benz CLA AMG CLA45?
The 2019 Mercedes-Benz CLA AMG CLA45 has a wheel offset of ETET48.