Mercedes-Benz GLA tire size
Original tire sizes for the Mercedes-Benz GLA, model years 2015, 2016, 2017, 2018, 2019 and 2020. Trim levels and wheel packages change the size within the same year, so confirm on the door-jamb sticker before ordering.
Check before you order. The surest answer is the tires on the car right now: the size is molded into the sidewall. The placard inside the driver's door tells you what the factory fitted. Our guide on reading a tire size shows exactly where to look.

Size by year and trim
| Model years | Trim or package | Tire size | From |
|---|---|---|---|
| 2015-2020 | base | 225/55R18 | $95 |
Tire size by model year
| Model year | Tire size | Trim or package | From |
|---|---|---|---|
| 2020 Mercedes-Benz GLA | 225/55R18 | base | $95 |
| 2019 Mercedes-Benz GLA | 225/55R18 | base | $95 |
| 2018 Mercedes-Benz GLA | 225/55R18 | base | $95 |
| 2017 Mercedes-Benz GLA | 225/55R18 | base | $95 |
| 2016 Mercedes-Benz GLA | 225/55R18 | base | $95 |
| 2015 Mercedes-Benz GLA | 225/55R18 | base | $95 |
What Mercedes-Benz approves
MO is the Mercedes approval, MOE is the run-flat version and MO1 is reserved for AMG models.
Mercedes tunes the tire to the car's suspension and electronic aids, so an MO tire on a Mercedes usually rides closer to how the car left the factory. MOE tires have a reinforced sidewall and only belong on a car built for them.
Brands that carry the approval
Written on the sidewall as: Continental ProContact (MO), Michelin Pilot Sport 4 (MO1).

Every US car built since 2003 carries this placard. It also gives the pressures, which the sidewall does not: the number molded into the tire is the maximum it can hold, not what your car wants.
What those tires cost
Mercedes-Benz GLA tires: common questions
What size tires does a Mercedes-Benz GLA take?
The most common original size is 225/55R18. Other model years and trims use different sizes, so check the list on this page and confirm against the sticker inside your driver's door.
Can I fit a different size on my Mercedes-Benz GLA?
You can, within limits: the overall diameter should stay within about 3 percent of the original, and the load index and speed rating must meet or exceed the door placard. Anything further changes your speedometer reading and can rub at full lock.
Where is the tire size on a Mercedes-Benz GLA?
Open the driver's door and look at the white and yellow placard on the door jamb or the B-pillar. The same size is also molded into the sidewall of the tires currently on the car, unless someone changed them.
What size tires does a 2020 Mercedes-Benz GLA take?
The 2020 Mercedes-Benz GLA came from the factory on 225/55R18. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.
What size tires does a 2019 Mercedes-Benz GLA take?
The 2019 Mercedes-Benz GLA came from the factory on 225/55R18. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.
What size tires does a 2018 Mercedes-Benz GLA take?
The 2018 Mercedes-Benz GLA came from the factory on 225/55R18. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.




