H&R 406556403 TRAK+ Wheel Adapters 5/112 to 5/112 Mercedes 66.5mm CB 14x1.5 (Pair)

The H&R TRAK+ Wheel Adapters (Part #406556403) are a hubcentric adapter pair designed to adapt Mercedes-Benz wheels with a 5/112 bolt pattern, 66.5mm center bore, and 14x1.5 thread pitch. Available in thicknesses ranging from 20mm to 25mm, these adapters change the vehicle's bolt pattern so that wheels from a different make or model can be properly fitted — all while maintaining a precise, hubcentric fit.

Unlike simple slip-on spacers, H&R TRAK+ Wheel Adapters bolt directly to the vehicle hub and feature a different bolt pattern on the wheel-facing side, enabling non-standard bolt pattern wheel fitment with confidence. Their hubcentric design ensures the wheel is centered on the hub — not the lug hardware — eliminating vibration and maintaining proper load distribution.

Key Features:

• Hubcentric design — centers the wheel precisely on the hub for vibration-free performance
• 5/112 bolt pattern with 66.5mm center bore and 14x1.5 thread specification for Mercedes-Benz applications
• Sold as a pair — two adapters included per order
• Proprietary aluminum/magnesium alloy construction — up to 70% lighter than a comparable steel product
• Hard anodized finish — tough, corrosion-resistant surface for long-term durability
• Maximizes track width — improves lateral stability, lowers roll center, and enhances overall handling
• Suitable for winter use with snow tires and alternate wheel sets

Wheel Bolt Safety Guidelines:

When sourcing replacement wheel bolts for use with these adapters, new bolts must be longer than the originals by the width of the adapter used. The bolt head style must match the existing hardware. Refer to the following minimum engagement (turns) requirements:

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

After installation, turn the wheel by hand to verify free rotation and confirm wheel bolts do not contact any brake system components (including ABS sensors). Note: maximum clearance tolerance on some vehicles — such as the Mercedes rear axle — may be as little as 2mm.

Bolt Head Type Reference (end digit guide):

• 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 x 1.5 — end digit 06