H&R 40255572 TRAK+ 25mm DRA Wheel Adapter for Mercedes 5/112 - 66.5 CB - 12x1.5 (Pair)

The H&R TRAK+ 40255572 is a pair of 25mm DRA Series hubcentric wheel adapters designed for vehicles using a Mercedes-style 5/112 bolt pattern with a 66.5mm center bore and M12x1.5 stud thread. These adapters allow you to mount wheels with a different bolt pattern to your existing hub, expanding your wheel fitment options while maintaining the precision fit and safety of H&R's hubcentric design.

As DRA Series adapters, they bolt directly to the hub using special included wheel bolts and provide new threaded holes on the wheel-facing side — no need to source longer wheel bolts separately. The hubcentric design mirrors the factory hub interface for even load distribution and lateral support, just like an OEM component.

Key Specifications:

• Thickness: 25mm per adapter
• Bolt Pattern (Hub Side): 5/112
• Center Bore: 66.5mm
• Stud Thread: M12x1.5
• Series: DRA — bolts to hub with included special wheel bolts; provides new threaded holes for wheel fitment
• Sold as: Pair (2 adapters)

Key Features:

• Hubcentric design with full contact hub for even load force distribution and lateral support
• Manufactured from a proprietary alloy with higher tensile strength than 6061-T6 billet aluminum — lightweight yet exceptionally strong
• Hard anodized finish for long-term durability and corrosion resistance
• Increases track width by 25mm per side for improved stance, handling, and lateral stability
• Engineered in Germany to strict quality and safety standards
• Attachment hardware included — no separate bolt purchase required

Wheel Bolt Safety Guidelines:

When selecting wheel bolts, ensure the bolt head style matches your existing hardware. The minimum load-bearing engagement requirements by thread pitch are:

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

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