H&R 406556012 TRAK+ Hubcentric Wheel Adapters for Mercedes 5/112 Bolt Pattern (Pair)

The H&R TRAK+ Wheel Adapters (Part# 406556012) are precision-engineered hubcentric adapters designed to adapt Mercedes wheels with a 5/112 bolt pattern, 66.5mm center bore, and 12x1.5 thread pitch. Sold as a pair, these adapters allow fitment of wheels with a different bolt pattern than the vehicle's hub, opening up a wide range of wheel options without sacrificing safety or performance. Available in thicknesses ranging from 20mm to 25mm.

Unlike simple spacers, H&R TRAK+ Wheel Adapters are hubcentric — they seat precisely on the vehicle hub just like a standard wheel, eliminating vibration and ensuring proper load distribution. The wheel-side face features a different bolt pattern, enabling non-standard bolt pattern wheel fitment with confidence.

Key Features:

• Hubcentric design — fits to the vehicle hub precisely, eliminating vibration
• Adapts 5/112 bolt pattern with 66.5mm center bore and 12x1.5 thread pitch (Mercedes specification)
• Made from a proprietary aluminum/magnesium alloy — up to 70% lighter than a comparable steel product
• Hard anodized finish for a tough, durable, corrosion-resistant surface
• Maximizes vehicle track width for improved lateral stability and handling
• Suitable for winter use with snow tires and dedicated winter wheels
• Sold as a pair (two adapters)

Wheel Bolt Selection Guidelines:

When ordering replacement wheel bolts for use with these adapters, follow these guidelines:

• New bolts must be longer than the original bolts by the width of the spacer/adapter used
• The bolt head style must match the existing bolts exactly:
  • Taper 60° — End digit 01
  • Round head M12/d24mm or M14/d28mm — End digit 02
  • Round head M12/d26mm (e.g., OE VAG wheels) — End digit 03
  • Flat head for Porsche OE wheels M14×1.5 — End digit 06

Minimum Wheel Bolt Engagement (Safety Guidelines):

• M12×1.25 — 8.0 turns (~10mm load-bearing shaft length)
• M12×1.50 — 6.5 turns (~10mm load-bearing shaft length)
• M12×1.75 — 6.5 turns (~12mm load-bearing shaft length)
• M14×1.25 — 9.0 turns (~12mm load-bearing shaft length)
• M14×1.50 — 7.5 turns (~12mm load-bearing shaft length)
• 1/2" UNF — 8.0 turns (~11mm load-bearing shaft length)

After installation, always verify that wheel bolts do not contact any brake system components, including ABS sensors. Rotate the wheel by hand to confirm free movement and adequate clearance on the inside of the hub. Note: Maximum clearance tolerance on some vehicles (e.g., Mercedes rear axle) may be as little as 2mm.