H&R 40675640 TRAK+ 20mm DRA Wheel Adapter 5/120 72.5CB to 5/114.3 64.1CB Pair

The H&R TRAK+ 40675640 is a 20mm DRA-series hubcentric wheel adapter sold as a pair. Designed for enthusiasts who want to run wheels with a different bolt pattern, these adapters convert a vehicle's existing hub to accept wheels with a non-matching bolt pattern — all while maintaining proper hubcentric alignment for a safe, rattle-free fitment.

How the DRA System Works:

The DRA (Dual-Row Adapter) system bolts directly to the vehicle hub using special included wheel bolts. The outward-facing side of the adapter features a new bolt pattern and threaded holes, allowing your wheels to mount using standard wheel bolts. No extended studs are required. This design is ideal for track widening of 40–60mm per axle and is particularly popular for fitting wheels from one European make to another.

Key Features:

• Hubcentric design with full-contact hub face for even load distribution and lateral support
• DRA system — bolts to hub with included special wheel bolts; provides new threaded holes for wheel bolts on the wheel side
• 20mm thickness per spacer (40mm total track widening per axle)
• Manufactured from a proprietary aluminum/magnesium alloy — lighter and higher tensile strength than standard 6061-T6 billet aluminum
• Hard anodized finish for long-term durability and corrosion resistance
• Engineered and manufactured in Germany
• Sold as a pair (two adapters)

Wheel Bolt Guidelines:

When selecting wheel bolts for use with this adapter, the new bolts must be longer than the originals by the width of the adapter (20mm). The bolt head style must match the existing wheel bolts:

• Taper 60° seat — end digit 01
• Round head M12/24mm or M14/28mm — end digit 02
• Round head M12/26mm (e.g., OE VAG wheels) — end digit 03
• Flat head Porsche OE M14×1.5 — end digit 06

Minimum Thread Engagement Safety Reference:

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

After installation, rotate the wheel by hand to confirm it spins freely and that the wheel bolts do not contact any brake components, ABS sensors, or other hardware. Note: some vehicles have a maximum clearance tolerance as tight as 2mm (e.g., Mercedes-Benz rear axle).