H&R 40675601 TRAK+ Wheel Adapters 5/120 to 5/120 72.5mm Hub BMW (Pair)

The H&R TRAK+ Wheel Adapters (Part #40675601) are a premium hubcentric solution designed to adapt BMW wheels with a 5/120 bolt pattern and 72.5mm center bore. Sold as a pair, these adapters allow fitment of wheels with a different bolt pattern while simultaneously widening the vehicle's track for improved stance and handling dynamics.

Unlike simple spacers, TRAK+ Wheel Adapters feature a dual bolt pattern design — they mount to the vehicle hub on one side and present a new bolt pattern on the wheel side, enabling non-standard wheel fitment. Like all H&R TRAK+ products, they are hubcentric, meaning they locate precisely on the vehicle's hub center to eliminate vibration and ensure a secure, balanced fit.

Key Features:

• Hubcentric design — locates on the factory hub center for vibration-free fitment
• 5/120 bolt pattern with 72.5mm center bore — engineered specifically for BMW applications
• Manufactured from a proprietary aluminum/magnesium alloy — up to 70% lighter than comparable steel products
• Hard anodized finish — tough, corrosion-resistant, and built for long-term durability
• Widens vehicle track width to improve lateral stability, lower roll center, and enhance handling
• Ideal for use with winter tire and wheel setups
• Sold as a pair (two adapters included)

Wheel Bolt Ordering Guidelines:

When DR Series spacers or adapters require longer wheel bolts, the following specifications apply:

• New bolts must be longer than original bolts by the thickness of the adapter used
• Bolt head must match the original — taper 60° (end digit 01), round head M12/d24mm or M14/d28mm (end digit 02), round head M12/d26mm OE VAG wheels (end digit 03), or flat head Porsche OE M14×1.5 (end digit 06)

Minimum Wheel Bolt Engagement (Safety Guidelines):

• M12×1.25 — 8.0 turns / approx. 10mm load-bearing shaft length
• M12×1.50 — 6.5 turns / approx. 10mm load-bearing shaft length
• M12×1.75 — 6.5 turns / approx. 12mm load-bearing shaft length
• M14×1.25 — 9.0 turns / approx. 12mm load-bearing shaft length
• M14×1.50 — 7.5 turns / approx. 12mm load-bearing shaft length
• 1/2" UNF — 8.0 turns / approx. 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 rotation and adequate clearance inside the hub. Note that maximum tolerance on some vehicles (such as the Mercedes rear axle) may be as little as 2mm.