H&R 402345714 TRAK+ Hubcentric Wheel Adapter for Audi 4/108 - 57.1 CB (Pair)

The H&R 402345714 TRAK+ Wheel Adapter is a precision-engineered, hubcentric bolt pattern adapter designed to fit vehicles with a 4/108 bolt pattern and 57.1mm center bore — allowing fitment of Audi wheels onto hubs with a different bolt pattern configuration. Sold as a pair, these adapters deliver both a wider stance and the ability to run non-OEM bolt pattern wheels with full hubcentric accuracy.

What Is a TRAK+ Wheel Adapter?

Unlike a standard wheel spacer that simply pushes the wheel outward, TRAK+ Wheel Adapters change the bolt pattern on the outboard (wheel-facing) side of the spacer. This makes it possible to mount wheels from a different vehicle platform while retaining proper center bore alignment and even load distribution — just like the factory hub.

Key Features:

• Hubcentric design — full contact hub interface matches factory tolerances for even load force distribution and lateral support
• Bolt pattern conversion — vehicle-side: 4/108 with 57.1mm center bore; outboard side configured for Audi wheel fitment
• Proprietary alloy construction — manufactured from a special aluminum/magnesium alloy developed exclusively for H&R, offering higher tensile strength than standard 6061-T6 billet aluminum
• Hard anodized finish — provides a tough, corrosion-resistant surface for long-term durability
• Widened track — moves wheels outward for improved stance, lowered roll center, and increased lateral stability
• Made in Germany — engineered to H&R's exacting European performance standards
• Sold as a pair — includes two (2) adapters

TRAK+ Series Guide:

• DR Series (10–40mm) — fits between wheel and hub; requires longer wheel bolts (sold separately). Verify bolt head type (taper or round) and shaft length before ordering.
• DRS Series (10–40mm) — fits between wheel and hub; requires exchanging existing wheel studs for longer ones (studs included).
• DRA Series (40–60mm) — bolts to the hub using special wheel bolts (included); provides new threaded holes for wheel bolts.
• DRM Series (40–90mm) — bolts to the hub using existing wheel studs and special nuts (included); wheel bolts to new DRM wheel studs.

Wheel Bolt Safety Guidelines:

When ordering replacement wheel bolts, new bolts must be longer than the originals by the thickness of the adapter. Match the bolt head type to the original:

• Taper 60° — end digit 01
• Round head M12/d24mm or M14/d28mm — end digit 02
• Round head M12/d26mm (e.g., OE VAG wheels) — end digit 03
• Flat head for Porsche OE wheels M14×1.5 — end digit 06

Minimum engagement turns required: 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 and verify full clearance from brake components including ABS sensors.