2019 Mercedes-Benz CLA250 — 4MATIC Sport Package
The 2019 Mercedes-Benz CLA250 4MATIC Sport Package came from the factory equipped with 235/40R18 tires. If your vehicle has since been fitted with aftermarket or upsized wheels, your actual tire size may no longer match this factory spec — always confirm against your door placard before buying.
235/40R18
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (94 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.4" |
| Revolutions per mile | ~794 |
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What this size means for your Mercedes-Benz CLA250
On the 2019 Mercedes-Benz CLA250 4MATIC Sport Package, the factory 235/40R18 measures about 25.4″ in overall diameter with a 94 mm (3.7″) sidewall, and completes roughly 794 revolutions per mile. Its 40-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a passenger (P-metric / Euro-metric) size.
Other 2019 Mercedes-Benz CLA250 trims
- 4MATIC Base Model 225/45R17 / 225/40R18
- Base Model 225/45R17 / 225/40R18
- Sport Package 235/40R18
Mercedes-Benz CLA250 tire sizes by year
- 2026 Mercedes-Benz CLA250 205/55R17 / 225/45R18 / 225/40R19
- 2025 Mercedes-Benz CLA250 225/45R18 / 225/40R19
- 2024 Mercedes-Benz CLA250 225/45R18 / 225/40R19
- 2023 Mercedes-Benz CLA250 225/45R18 / 225/40R19
- 2022 Mercedes-Benz CLA250 225/45R18 / 225/40R19
- 2021 Mercedes-Benz CLA250 225/45R18 / 225/40R19
- 2020 Mercedes-Benz CLA250 225/45R18 / 225/40R19
- 2018 Mercedes-Benz CLA250 225/45R17 / 225/40R18
- 2017 Mercedes-Benz CLA250 225/45R17 / 225/40R18
- 2016 Mercedes-Benz CLA250 225/45R17 / 225/40R18
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.