H&R 402555412 TRAK+ 20mm Wheel Adapter 5/112 66.5CB 12x1.5 - Pair

The H&R TRAK+ Wheel Adapter (Part #402555412) is a 20mm hubcentric wheel adapter designed to adapt Mercedes-style wheels featuring a 5/112 bolt pattern, 66.5mm center bore, and M12x1.5 thread to a different bolt pattern — allowing fitment of wheels from a different vehicle make or model. Sold as a pair (one per axle side).

What Are TRAK+ Wheel Adapters?

H&R TRAK+ Wheel Adapters are hubcentric spacers that mount to the vehicle hub exactly like a standard wheel spacer, but feature a different bolt pattern on the wheel-facing side, enabling non-OEM bolt pattern wheel fitment. The hubcentric design provides a full-contact hub interface — just like the factory hub — for even load force distribution and lateral support, eliminating vibration and ensuring precise alignment.

Key Features:

• Hubcentric design with full-contact hub for even load distribution and lateral support
• Vehicle-side specs: 5/112 bolt pattern | 66.5mm center bore | M12x1.5 thread
• 20mm thickness per wheel (40mm total track widening per axle)
• Manufactured from a proprietary aluminum alloy with higher tensile strength than 6061-T6 billet aluminum
• Hard anodized finish for long-lasting durability and corrosion resistance
• Sold as a pair (two adapters) — one complete axle set
• Engineered in Germany to strict OEM-grade quality standards

Wheel Bolt Guidelines

When selecting wheel bolts for use with this adapter, replacement bolts must be longer than the originals by the width of the adapter (20mm). Bolt head style must match the wheel's seat type:

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

Minimum Thread Engagement (Safety Guidelines):

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

Important Installation Note: After installation, rotate the wheel by hand to verify clearance on the inside of the hub. The wheel must spin freely. Ensure wheel bolts do not contact ABS sensors or any brake system components. Note that maximum clearance tolerance on some vehicles (such as the Mercedes rear axle) may be as little as 2mm.