H&R 50675640 TRAK+ Hubcentric Wheel Adapters for BMW 5/120 72.5CB - Pair

The H&R TRAK+ 50675640 are hubcentric wheel adapters designed to adapt BMW wheels with a 5/120 bolt pattern and 72.5mm center bore to a different bolt pattern configuration. Sold as a pair, these adapters allow you to run wheels from a different vehicle make or model while maintaining proper hubcentric alignment for a safe, precise fit.

Unlike generic spacers, H&R TRAK+ Wheel Adapters feature a hubcentric design with a full-contact hub surface—mirroring the factory hub interface—for even load force distribution and lateral support. The vehicle side of the adapter mounts exactly as a standard wheel spacer would, while the wheel side presents a different bolt pattern to accommodate non-standard wheel fitment.

Key Features:

• Hubcentric design with full-contact hub for even load distribution and lateral support
• Manufactured from a special proprietary alloy with higher tensile strength than 6061-T6 billet aluminum
• Lighter weight construction compared to comparable steel products
• Hard anodized finish for long-lasting durability and corrosion resistance
• Changes bolt pattern to allow fitment of wheels from a different vehicle
• Widens vehicle track for improved stance, lowered roll center, and increased lateral stability
• Sold as a pair (two adapters)

Wheel Bolt Guidelines:

When using wheel adapters, replacement wheel bolts must be longer than the originals by the thickness of the adapter. The bolt head style must match the original (taper 60°, round head, or flat head). Always verify minimum thread engagement meets safety requirements before installation. Ensure wheel bolts do not contact any brake system components, including ABS sensors—rotate the wheel by hand to confirm full clearance after installation.

Minimum Thread Engagement Reference:

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