H&R 40675662 TRAK+ Wheel Adapters 5/120 to 5/120 BMW Hubcentric (Pair)

The H&R TRAK+ Wheel Adapters (Part #40675662) are hubcentric wheel adapters designed for BMW applications featuring 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. Available in thicknesses ranging from 20mm to 25mm, they are an ideal solution for enthusiasts looking to run non-standard bolt pattern wheels on their BMW.

Like the TRAK+ DRM Series spacers, these adapters are hubcentric — meaning they mount flush to the vehicle hub just as a standard wheel would. The vehicle-side interface matches the OEM hub precisely, while the wheel-side features the adapted bolt pattern, ensuring a secure, wobble-free fit without requiring hub rings or centering tools.

Key Features:

• Hubcentric design — fits precisely to the OEM hub for a vibration-free installation
• Bolt pattern: 5/120 (vehicle side) with 72.5mm center bore for BMW applications
• Sold as a pair — two adapters included per order
• Available thicknesses: 20mm to 25mm for adjustable track widening
• Proprietary aluminum/magnesium alloy construction — up to 70% lighter than comparable steel spacers
• Hard anodized finish — provides a tough, corrosion-resistant surface
• Widens vehicle track for a more aggressive stance, lowered roll center, and increased lateral stability
• Compatible with winter wheel and snow tire setups

TRAK+ Adapter Series Overview:

• DR Series (10–40mm): Fits between wheel and hub; requires longer wheel bolts (ordered separately). Verify bolt type — taper or round head — before ordering.
• DRS Series (10–40mm): Fits between wheel and hub; existing wheel studs are exchanged for longer ones (included).
• DRA Series (40–60mm): Bolts to hub with special wheel bolts (included); provides new threaded holes for wheel bolts.
• DRM Series (40–90mm): Bolts to hub using existing wheel studs and special nuts (included); wheel bolts to new DRM wheel studs.

Wheel Bolt Selection Guidelines (if applicable):

• Replacement bolts must be longer than originals by the width of the spacer used
• Bolt head style must match OEM: Taper 60° (end digit 01), Round M12/d24mm or M14/d28mm (end digit 02), Round M12/d26mm OE VAG (end digit 03), Flat head Porsche M14×1.5 (end digit 06)
• Minimum thread engagement: M12×1.25 = 8.0 turns (~10mm); M12×1.50 = 6.5 turns (~10mm); M12×1.75 = 6.5 turns (~12mm); M14×1.25 = 9.0 turns (~12mm); M14×1.50 = 7.5 turns (~12mm); 1/2" UNF = 8.0 turns (~11mm)
• After installation, rotate the wheel by hand to confirm free rotation and verify no contact with ABS sensors or brake components. Note: maximum clearance tolerance on some vehicles (e.g., rear axle Mercedes) may be as little as 2mm.