Audi 80 Quiz
Wheels and Tires

Wheel bolts and wheels – a single unit

In this manual: Wheels and Tires
Technical Description — 39Engines — 41Exhaust System — 13Cooling System — 28Fuel tank and fuel pump — 12Air Filter and Intake Ducts — 13Mono-Motronic Injection System — 18Digifant Injection System — 19KE-III-Jetronic Injection System — 35MPI and MPFI Injection Systems — 32Clutch — 11Transmission and Driveline — 21Suspension and Steering — 33Brake System — 41Anti-lock brake system — 8Wheels and Tires — 13Body Electrical System — 35Ignition System — 24Lighting — 14Signaling Devices — 7Instruments and Auxiliary Equipment — 54Heating and Ventilation — 7Body Components — 18Troubleshooting — 6Specifications — 13
~1min read

Structurally, the wheel bolts and wheels form a single unit and therefore must not be used separately. The conical seat in the wheel bolt holes is precisely matched to the cones of the wheel bolts. Other cone shapes cannot guarantee a secure attachment of the bolt and thus of the wheel.


For wheels (steel and alloy) fitted and approved at Audi factories, only the so-called acorn-head bolt (part number 431 601 139 A) may be used. It can be recognized by the special recesses at the top of the bolt head. Different rules apply to rims purchased from a parts store. Wheel bolts from the appropriate manufacturer should be purchased!

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A quick Audi 80 quiz: every answer comes with an explanation and a link to the manual page.