H&R 447557403 TRAK+ Wheel Adapters 5/112 to 5/112 66.5mm CB 14x1.5 Mercedes (Pair)

The H&R TRAK+ Wheel Adapters (Part #447557403) are precision-engineered hubcentric wheel adapters designed for Mercedes-Benz applications with a 5/112 bolt pattern, 66.5mm center bore, and 14x1.5 thread pitch. Sold as a pair, these adapters allow fitment of wheels with a different bolt pattern while simultaneously widening the vehicle's track width for improved stance and performance.

Unlike basic wheel spacers, TRAK+ Adapters feature a different bolt pattern on the wheel-facing side, enabling non-standard bolt pattern wheel fitment. They mount hubcentrically to the vehicle hub — just like a standard TRAK+ DRM Series spacer — ensuring proper centering and eliminating vibration. Available in thicknesses from 20mm to 25mm, these adapters deliver both aesthetic and handling benefits.

Key Features:

• Hubcentric design — fits flush to the vehicle hub for precise centering and vibration-free performance
• Dual bolt pattern — vehicle-side and wheel-side bolt patterns differ, enabling cross-fitment of non-OEM bolt pattern wheels
• Proprietary aluminum/magnesium alloy construction — up to 70% lighter than comparable steel products
• Hard anodized finish — resists corrosion for long-lasting durability
• Maximizes track width — improves lateral stability, lowers roll center, and enhances handling
• Sold as a pair — includes two adapters
• Compatible with snow tire and winter wheel setups

Specifications:

• Bolt Pattern: 5/112 (Mercedes)
• Center Bore: 66.5mm
• Thread Pitch: M14 x 1.5
• Thickness Range: 20mm – 25mm
• Quantity: 2 (pair)

Wheel Bolt Guidelines:

When ordering replacement wheel bolts for use with these adapters, observe the following:

• New bolts must be longer than the originals by the thickness of the adapter used
• Bolt head style must match existing hardware — taper 60° (end digit 01), round head M12/d24mm or M14/d28mm (end digit 02), round head M12/d26mm OE VAG-style (end digit 03), or flat head Porsche M14x1.5 (end digit 06)
• Minimum engagement (load-bearing shaft length): M14 x 1.5 = 7.5 turns ≈ 12mm
• After installation, rotate the wheel by hand to verify full clearance from brake components, ABS sensors, and hub internals — maximum tolerance on some vehicles (e.g., Mercedes rear axle) is as little as 2mm

H&R TRAK+ Wheel Adapters are a trusted solution among European car enthusiasts seeking a wider, more aggressive stance without sacrificing the precision fitment and safety standards that H&R is known for.