Tire fitment
The 2025 Mercedes-Benz GLC base tire size is 235/60R18 — 235 mm wide with a 60% aspect ratio on 18″ rims. 4 OEM sizes are available across trims.
2025 Mercedes-Benz GLC
235/60R1829.1″ overall diameter · 141 mm sidewall · ~693 rev/mi
| Trim | Tire size | Rim | Diameter | vs Base |
|---|---|---|---|---|
| GLC 300 ★ | 235/60R18 | 8×18″ | 29.1″ (739.2 mm) | — |
| GLC 300 AMG Line | 255/45R20 | 8.5×20″ | 29″ (737.5 mm) | -0.23% |
| AMG GLC 43 (front) | 265/45R20 | 9.5×20″ | 29.4″ (746.5 mm) | +0.99% |
| AMG GLC 43 (rear) | 295/40R20 | 10×20″ | 29.3″ (744 mm) | +0.65% |
Staggered: 265/45R20 front, 295/40R20 rear.
The 2025 Mercedes-Benz GLC ships with 235/60R18 tires on the base trim — that's an overall diameter of 29.1″. The 235 mm width and 60% sidewall ratio give you 141 mm of sidewall cushion between the rim and the road.
Match the load index and speed rating from your door-jamb placard — not just the size. If you're switching sizes, keep the overall diameter within ~3% to avoid speedometer error and potential ABS/traction-control issues.
Factory fitment for the 2025 Mercedes-Benz GLC; verify against your door-jamb placard or owner's manual.
The base 2025 Mercedes-Benz GLC uses 235/60R18 tires — 235 mm wide, 60% aspect ratio, on 18-inch rims. The overall diameter is 29.1″ (739.2 mm). Higher trims use different sizes — see the table above. Confirm against your door-jamb placard.
Yes, within limits. Keep the overall diameter within about 3% of 29.1″ to avoid speedometer error and clearance issues. A wider tire may improve grip, but match the load and speed ratings your GLC requires.
235/60R18 tires have an overall diameter of 29.1″ (739.2 mm), with a 141 mm sidewall height. That's about 693 revolutions per mile.
The 2025 Mercedes-Benz GLC tire sizes shown are OEM factory fitments. Confirm your exact tire size, load rating, and speed rating against the door-jamb placard or owner's manual before buying tires.