Fitting wheels on a Mercedes GLC-Classe Coupe C254
A Mercedes GLC-Classe Coupe C254 (from 2023) uses a 5x112 PCD and a centre bore of 66.6 mm.
Any wheel must match the vehicle's PCD exactly: there is no tolerance, unless you use a PCD adapter.
Centre bore: the wheel must have a centre bore of 66.6 mm or more. If it is larger (as with most aftermarket wheels), add a hub centric ring wheel centre bore → 66.6 mm.
Offset: the original is ET30 to ET35.5. Compare your future wheel with the offset calculator (your vehicle is already selected) to see how many millimetres further in or out it will sit.
Fixings: thread M14x1.5. The nuts or bolts must have the same seat (conical, spherical or flat) as the wheel.
Tyres: original fitment is 255/45R20, 235/60R18, 235/55R19, 285/40R20. For another size, check the diameter difference with the equivalence calculator (under 3 % recommended).
Generations of the Mercedes GLC-Classe Coupe
Previous generation: Mercedes GLC-Classe Coupe C253 (2016–2023) — same 5x112 bolt pattern and same centre bore: original wheels swap between the two generations; check offset and diameter.
The original specs vary with the year, trim or wheel size. Identify your version from the tyre size marked on the sidewall.
Version
PCD
Centre bore
Wheel
Offset
Tyre
Avant
5x112
66.6 mm
8.5Jx20
ET34.5
255/45R20
Avant
5x112
66.6 mm
8Jx18
ET32.5
235/60R18
Avant
5x112
66.6 mm
8Jx19
ET32.5
235/55R19
Arrière
5x112
66.6 mm
9.5Jx20
ET35.5
285/40R20
Arrière
5x112
66.6 mm
9Jx18
ET30
255/55R18
Arrière
5x112
66.6 mm
9Jx19
ET30
255/50R19
Vehicles with the same PCD and centre bore
Same 5x112 PCD and same 66.6 mm centre bore: wheels from these vehicles bolt on and centre on a Mercedes GLC-Classe Coupe C254 without rings. Offset, width, diameter and caliper clearance still need checking.
These vehicles also use 5x112 but with a different centre bore: their wheels need a hub centric ring if their centre bore is larger than 66.6 mm, and will not fit if it is smaller.
What is the PCD of a Mercedes GLC-Classe Coupe C254?
A Mercedes GLC-Classe Coupe C254 (from 2023) has a PCD of 5x112: 5 studs or bolts spaced around a circle 112 mm in diameter.
Does a Mercedes GLC-Classe Coupe C254 need a hub centric ring?
The centre bore (hub diameter) of a Mercedes GLC-Classe Coupe C254 is 66.6 mm. A wheel with a larger centre bore is fitted with a hub centric ring that brings it down to the hub diameter. A wheel with a smaller centre bore cannot be fitted.
What offset (ET) for a Mercedes GLC-Classe Coupe C254?
The recorded original offset is ET30 to ET35.5 depending on the version and wheel size. A lower ET pushes the wheel outwards, a higher ET pulls it inwards: check wheel well and caliper clearance before making any change.
Which vehicles have the same PCD as a Mercedes GLC-Classe Coupe C254?
With the same PCD (5x112) and the same centre bore (66.6 mm), these include: Mercedes AMG GT C192, Mercedes CLE C236, Mercedes CLE C236 AMG, Mercedes E-Classe W214. Offset, width and rim diameter still need checking for each vehicle.
Does a value look wrong, or is a version missing? Let us know, we check every report.
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