H&R 406556402 TRAK+ Wheel Adapters 5/112 to 5/112 66.5mm CB 12x1.5 Mercedes (Pair)

The H&R TRAK+ Wheel Adapters (Part #406556402) are precision-engineered hubcentric adapters designed to adapt Mercedes-Benz wheels with a 5x112 bolt pattern, 66.5mm center bore, and M12x1.5 thread pitch. 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.

Unlike basic spacers, TRAK+ Wheel Adapters are fully hubcentric — they seat precisely on the vehicle hub just like a standard wheel, eliminating vibration and ensuring proper load distribution. The outboard face features a different bolt pattern, enabling non-OEM bolt pattern wheel fitment without sacrificing safety or fit quality. Available in thicknesses ranging from 20mm to 25mm.

Key Features:

• Hubcentric design for precise fitment and vibration-free operation
• Adapts Mercedes-Benz 5x112 / 66.5mm CB / M12x1.5 wheel applications
• Sold as a pair (two adapters included)
• Manufactured from a proprietary aluminum/magnesium alloy — up to 70% lighter than comparable steel
• Hard anodized finish for lasting durability and corrosion resistance
• Widens vehicle track width to improve lateral stability and reduce body roll
• Suitable for year-round use including winter snow tire and wheel setups

Wheel Bolt Safety Guidelines:

When replacement wheel bolts are required, new bolts must be longer than the originals by the thickness of the adapter. The bolt head style must match the original — refer to the end-digit coding below:

• End digit 01: Taper 60° seat
• End digit 02: Round head for M12/d24mm or M14/d28mm
• End digit 03: Round head for M12/d26mm (e.g., OE VAG wheels)
• End digit 06: Flat head for Porsche OE wheels M14x1.5

Minimum Thread Engagement (Safety Reference):

• M12x1.25 — 8.0 turns / approx. 10mm load-bearing shaft length
• M12x1.50 — 6.5 turns / approx. 10mm load-bearing shaft length
• M12x1.75 — 6.5 turns / approx. 12mm load-bearing shaft length
• M14x1.25 — 9.0 turns / approx. 12mm load-bearing shaft length
• M14x1.50 — 7.5 turns / approx. 12mm load-bearing shaft length
• 1/2" UNF — 8.0 turns / approx. 11mm load-bearing shaft length

After installation, always rotate the wheel by hand to confirm free rotation and verify that wheel bolts do not contact any brake system components, ABS sensors, or other hardware. Maximum clearance tolerance on some vehicles (e.g., Mercedes rear axle) may be as little as 2mm.