Audi brake rotors are available for different axle positions and caliper applications. Disc diameter and the hub's center opening are important alongside any caliper-manufacturer condition. Find your Audi's brake configuration at A-Premium, then compare single-disc or axle-pair quantities and the complete dimensions of each suitable rotor.
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OUTAudi brake rotors can be matched by caliper manufacturer and disc size as well as model and year. A caliper-manufacturer requirement can appear alongside a particular front-disc diameter, while rear options have their own dimensions and assembly requirements. Identify the installed equipment before comparing replacements. Then check the rotor's mounting dimensions, construction and quantity so the purchase covers the correct axle with parts that fit its existing brake assembly.
The rotor's center opening forms one part of its fit with the hub, alongside the bolt pattern and mounting height.
The center opening must fit the specified hub interface so the disc can sit in its intended mounting position. It works with the bolt pattern and rotor height, rather than replacing either measurement. Compare these dimensions for the correct axle and brake equipment. During installation, the mating surfaces need the preparation specified in the service procedure. Corrosion or damage that prevents proper seating must be addressed; selecting the right center opening alone cannot restore an uneven or damaged mounting face.
A two-disc axle package covers the stated driver and passenger sides; a single-disc offer supplies only one component.
A single rotor serves one wheel; a pair normally covers the two sides of its stated axle. A four-disc set can cover front and rear, with different parts assigned to each position. Compare both the quantity and the location before ordering. Rotor replacement also calls for suitable new pads, which need a separate inclusion statement or purchase. Sorting that list before the job begins helps distinguish the discs supplied from the complete set of friction and fitting components the repair requires.
Minimum rotor thickness is a service limit for the particular disc. Compare measurements of the working area with that limit, and inspect both faces for damage or corrosion that may also require replacement. The raised outer lip does not show the remaining thickness across the friction surface. Nominal thickness describes the disc when new and serves a different purpose. Keeping these measurements distinct helps determine whether the existing rotor can remain in service or whether the repair needs new discs and pads across the axle.
Suitable new pads should accompany new discs across the affected axle. A front rotor pair supplies the disc portion of that work. Compare the separate pads or an appropriate Audi brake rotor and pad kit, and check the required fitting items before placing the order.
A rear rotor pair serves the rear axle only. Front brakes require their own components if inspection shows that they also need replacement. Match each axle's rotor diameter, thickness and mounting position separately rather than assuming that a rear disc or a similar-looking front part can serve both positions. The guide to brake rotor construction and replacement signs explains the related inspection points.
A front rotor's mounting height places its working faces relative to the caliper and pads. It is separate from outside diameter and hole count. A rotor can attach to the hub yet sit incorrectly within the brake if that height differs, so the complete dimensional specification matters.
A wheel change alone does not define a new brake specification. The rotor still has to match the installed hub, bracket and caliper arrangement. If the brakes have been modified, identify the complete fitted assembly before ordering; factory-wheel notes should not be treated as permission to mix unrelated brake components.
Follow the preparation instructions supplied for that disc. Protective treatments can differ, so cleaning or treatment should not be guessed from the surface's color alone. Check for shipping damage and keep the friction faces free from unwanted contamination before installation. Use the specified procedure for the particular replacement part. The preparation method should preserve any treatment intended to remain on the component.
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