Spare wheel cover II for Mercedes G-class W463A Gronos
Spare Wheel Cover II for Mercedes G-Class W463A Gronos
The exterior-mounted spare wheel is one of the G-Wagon's most iconic design elements — a functional carryover from the original military 4×4 specification that has become a visual signature distinguishing the G-Class from every contemporary SUV. Mounted on the rear door of the W463A at the centreline of the tailgate's outer face, the spare wheel and its cover occupy the single most visually prominent position on the vehicle's rear face. The Spare Wheel Cover II from the Mansory Body Kit for Mercedes G-Class W463A Gronos transforms this signature element with a full carbon-fibre cover that replaces the OEM plastic or fabric cover, presenting the visible 3K twill weave at the geometric centrepoint of the W463A's rear face. The II designation reflects a revised cover design that improves the edge-sealing geometry around the spare wheel rim, reduces the gap between the cover outer edge and the wheel rim face, and introduces a locking mechanism that is more reliable than the generation I cover under the combined stresses of vibration and tailgate-slam loads.
Construction & Materials
The Spare Wheel Cover II is formed as a convex-domed carbon-fibre panel, shaped to clear the spare wheel's tyre profile by 15–20 mm at the panel centreline, with a turned-in perimeter flange that engages behind the wheel rim shoulder. The convex dome geometry requires the prepreg laminate to be formed against an accurate tool that represents the tyre's crown profile precisely — any misalignment between the tool geometry and the actual tyre produces a cover that contacts the tyre at the dome centreline under thermal expansion cycling, which is the primary cause of clearcoat rub-through on imprecisely formed spare wheel covers.
Mansory produces the Cover II mould set for the specific tyre sizes that the W463A is commonly specified with — 275/50 R20 on the standard G63 AMG specification and 295/40 R22 on the optional 22-inch package — with the 20-inch tyre size as the primary cover geometry and an extended-dome variant for the 22-inch tyre. Specify your wheel and tyre combination at order. The outer visible surface is 3K twill prepreg with the weave concentric from the cover centreline — the weave runs in a radial spoke pattern rather than linear diagonal, emphasising the circular geometry of the cover and echoing the wheel-and-tyre assembly below it.
- Form: convex-domed prepreg carbon — dome geometry specific to tyre size (20-inch or 22-inch); specify at order
- Weave: 3K twill in concentric radial pattern from cover centreline — circular weave layout references wheel-and-tyre geometry
- Clearance: 15–20 mm between dome centreline and tyre crown — prevents contact rub-through under thermal expansion
- Perimeter flange: turned-in flange engaging behind wheel rim shoulder — second-generation flange geometry reduces gap between cover outer edge and rim face to 2–3 mm
- Locking mechanism: II-generation centre-lock with quarter-turn stainless-steel cam — more reliable than generation I clip-type under vibration and tailgate slam
- Wall thickness: 2.4–2.8 mm on dome face; 3.2–3.8 mm at perimeter flange
- Weight: approximately 2.8–3.6 kg depending on tyre-size variant — versus OEM spare wheel cover approximately 1.8–2.4 kg (carbon dome is heavier than fabric but lighter than moulded plastic full covers)
- Clearcoat: dual-layer UV-stable gloss lacquer; satin on request
Design & Visual Function
A spare wheel cover at the centre of the W463A's rear face performs a unique visual function that no other Gronos component can replicate: it places the programme's carbon identity at the geometric heart of the G-Wagon's most scrutinised surface — the rear face seen by every vehicle following. On a production G-Wagon the spare wheel cover is the first thing that distinguishes the rear face from the back of any other large SUV; in Gronos specification with the carbon Cover II it becomes the most photographed element of the vehicle's exterior, because the concentric radial weave pattern in 3K twill at the cover's face creates a visual target that draws the eye from any following distance.
The radial weave layout is a specific design choice that distinguishes the Cover II from other Gronos flat-panel components. While the bonnet, door panels, mirror housings, and pillar covers use linear diagonal or parallel weave directions that follow the panel's primary dimension, the spare wheel cover's circular form demands a weave layout that references the circle. The concentric radial pattern achieves this by placing each fibre bundle on a radius of the cover dome, creating an expanding series of weave-pattern rings that grow outward from the centreline toward the perimeter flange — a pattern that is unique on the W463A exterior and immediately identifiable as the Gronos programme's treatment of this iconic element.
Compatibility & Fitment
Spare Wheel Cover II fits the W463A spare wheel as fitted to the rear door at the tailgate centreline. Specify tyre size at order: 275/50 R20 (standard G63 AMG and G500 specification) or 295/40 R22 (optional 22-inch AMG package). Post-2024 facelift W463A retains the same rear door spare-wheel mounting. Not compatible with spare wheel setups on pre-2018 W463.
Installation & Reversibility
Installation time is 15–25 minutes. Remove the existing spare wheel cover, position the Spare Wheel Cover II over the spare wheel tyre face, engage the perimeter flange behind the wheel rim shoulder at six clockface positions around the perimeter, and lock the quarter-turn centre cam to hold the flange engagement in place. Check that the dome face clears the tyre crown by 15–20 mm around the full circumference before locking. The OEM cover is stored for reversibility — the installation leaves no marks on the wheel or tyre.
Pairing within the Mansory Gronos programme
The spare wheel cover pairs naturally with rear-face components. The Spare Wheel Cover Frame in the same Gronos programme offers an alternative partial-cover approach for W463A owners who prefer a frame treatment around the spare wheel rather than a full cover dome. The Rear Door Panel extends the carbon programme to the rear door body surface around the spare wheel mounting zone. For rear-corner visual framing, the Rear Light Protection Cover adds carbon treatment to the rear lamp clusters flanking the spare wheel zone.
Maintenance & Durability
The rear-face position of the spare wheel cover exposes the dome surface to the spray and debris thrown forward from following vehicles — the W463A generates a strong wake vortex behind the tailgate that draws road-surface spray forward onto the rear face. The cover's dome geometry naturally sheds most liquid, but fine road grit deposits on the dome's lower face between the dome and the tyre surface in the perimeter flange gap. After washing the rear face, direct a water spray into the flange gap from the side (not from directly behind) to flush any grit deposits from the contact zone between the flange and the rim shoulder. A build-up of abrasive grit at this interface will cause slow clearcoat abrasion on the perimeter flange edge under the vibration of the wheel in service.
Apply UV-protective ceramic sealant to the dome face every 6–8 weeks — the rear face of the W463A receives strong rear-hemisphere solar radiation (equivalent to a full south-facing solar exposure cycle) and the dome's convex face is exposed to direct UV from the low-angle morning and evening sun that hits the rear face at a near-perpendicular angle. Inspect the quarter-turn centre cam annually for corrosion staining — the stainless-steel cam is resistant but can develop surface rust at the spring contact points; a light stainless-steel cleaning wax maintains the cam's finish and prevents rust migration onto the carbon dome face around the centre-lock aperture.
Lead Time & Warranty
Lead time for Spare Wheel Cover II is 2–3 weeks from order, noting that tyre-size tooling may affect delivery if the less-common 22-inch variant is requested. 12-month warranty against delamination, clearcoat adhesion failures, perimeter flange geometry defects, and centre-lock cam mechanism failures.
FAQ
Q: Will the Cover II fit both the standard 20-inch and the 22-inch tyre?
A: No — the dome geometry is tyre-size specific. Specify your spare tyre size at order. If you are uncertain of your spare tyre size, the factory spare on the G63 AMG with standard 20-inch wheel package is 275/50 R20; with the optional AMG 22-inch package the spare is typically 295/40 R22.
Q: How does the concentric radial weave pattern differ from the standard linear diagonal on other Gronos panels?
A: The radial weave requires the prepreg to be laid up in a spoke pattern from the dome centreline using wedge-shaped fibre strips that converge at the centre and flare outward to the perimeter. This is more complex to lay up than a linear diagonal and results in a small wasted material area at the perimeter where the wedge strips terminate — the finished trim is visible at the inner face of the perimeter flange. It is the correct approach for a circular panel, where linear diagonal weave would produce visible misalignment at the perimeter radius.
Q: Can I mount a Mansory logo emblem at the cover centreline through the centre-lock aperture?
A: Yes. The centre-lock cam body can accept an aftermarket Gronos logo badge over the cam's exposed face. Consult Mansory for the logo badge specification compatible with the Cover II centre-lock aperture diameter.
Q: Is the Cover II compatible with a spare wheel that has a locking wheel bolt?
A: Yes. The Cover II is fitted over the tyre surface, not the wheel face or bolt pattern. Locking wheel bolts on the spare wheel do not interact with the Cover II fitting procedure.
Q: How heavy is the Cover II on the rear door hinge?
A: At 2.8–3.6 kg the Cover II is heavier than a fabric spare wheel cover but comparable to a moulded plastic full cover. The W463A's rear door hinges are engineered for the full weight of the spare wheel assembly (typically 25–35 kg including wheel and tyre) — the Cover II's additional 1–2 kg above the OEM cover mass is within the hinge load design envelope.
Specify your spare wheel tyre size and cover finish with the Hodoor Mansory team: Contact us via WhatsApp +44 7488 818 747 or [email protected].
