H&R 50525571 TRAK+ Hubcentric Wheel Adapters 5/100 to 57.1 CB (Pair)

The H&R TRAK+ Wheel Adapters (Part #50525571) are precision-engineered hubcentric adapters designed to adapt Audi and Volkswagen wheels with a 5/100 bolt pattern and 57.1mm center bore. Sold as a pair, these adapters allow fitment of wheels with a different bolt pattern than your factory hub, opening up a wide range of aftermarket and cross-platform wheel options.

Unlike simple spacers, TRAK+ Wheel Adapters are fully hubcentric — they seat directly onto the vehicle hub just like a standard wheel, ensuring proper centering, reduced vibration, and safe load transfer. The wheel-side face features a different bolt pattern, enabling non-OEM bolt pattern wheels to be mounted securely.

Key Features:

• Hubcentric design — centers precisely on the vehicle hub for vibration-free fitment
• Changes bolt pattern — allows wheels with a different bolt pattern to be fitted to your vehicle
• Available in 20mm to 25mm thicknesses — adds track width while accommodating the adapter plate
• Proprietary aluminum/magnesium alloy construction — up to 70% lighter than a comparable steel product
• Hard anodized finish — provides a tough, corrosion-resistant surface for long-term durability
• Maximizes vehicle track width for improved lateral stability and handling
• Suitable for use with winter tire and wheel setups
• Sold as a pair (two adapters)

Wheel Bolt Selection Guidelines:

When ordering replacement wheel bolts for use with these adapters, follow these guidelines to ensure safe installation:

• New bolts must be longer than original bolts by the width of the adapter used
• Bolt head type must match existing bolts — Taper 60°, round head (M12/d24mm or M14/d28mm), round head (M12/d26mm for OE VAG wheels), or flat head (Porsche OE M14×1.5)

Minimum Wheel Bolt Engagement (Safety Guideline):

• 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, rotate the wheel by hand to verify clearance on the inside of the hub. Ensure wheel bolts do not contact ABS sensors or any brake system components. Note: maximum clearance tolerance on some vehicles (e.g., Mercedes rear axle) may be as little as 2mm.