
The tire model of the Audi A4 is 245/45R18, which indicates that the tire width is 245 millimeters, the aspect ratio is 45, 'R' stands for radial tire, and '18' means it can be mounted on 18-inch rims. An aspect ratio of 45 means the sidewall height is 45% of the tread width. The larger the aspect ratio, the thicker the sidewall, which improves comfort but reduces handling performance. The Audi A4 is a B-segment model launched by FAW-Volkswagen. It comes in three engine displacements: 1.8T, 2.4T, and 3.0T. The 1.8T is available in four variants: manual base model, automatic base model, comfort model, and technology-leading model. The 2.4T is available in three variants: comfort model, comfort sport model, and comfort premium model. The 3.0T is only available in one variant, equipped with the quattro all-wheel-drive system.

I've been driving my Audi A4 for three years now, and the tire size is 225/45 R18, which is pretty standard for my sport version. After all these miles, I feel it significantly enhances the handling, especially making it less prone to skidding on curves. For routine maintenance, I go to the garage every six months to check the tire pressure, keeping it around 34 psi—too high affects comfort, and too low increases fuel consumption. Additionally, tire models can vary greatly depending on the car version; for example, the base model might use 205/55 R16, which is more suitable for city commuting. I recommend that car owners regularly rotate their tires to avoid uneven wear. When getting new tires, it's best to choose certified brands like Michelin or Goodyear, which can extend the tire's lifespan. The tire selection for the Audi A4 takes into account many safety factors, and neglecting them can easily lead to problems.

I've worked in an auto repair shop for many years and have handled numerous tire replacement services for the Audi A4. Common tire specifications include 225/50 R17 or 225/45 R18, depending on the year and configuration. For example, the 2020 sports version often uses 18-inch tires for more stable handling. I always remind customers to check tread depth – once it falls below 1.6mm, replacement is necessary to avoid skidding and compromised braking in wet conditions. When installing new tires, I recommend balancing all four wheel positions to prevent uneven wear. The Audi factory manual specifies recommended sizes, as choosing the wrong ones may affect steering responsiveness. For regular maintenance, check tire pressure monthly – maintaining it between 32-36 psi with minor fluctuations is acceptable. For frequent long-distance driving, selecting tires with wear-resistant materials is advisable.

I bought this Audi A4 second-hand and replaced the tires with 245/40 R18, which provide better grip than the standard 225/45 R18. It feels exhilarating to drive, with quick response when cornering. There are significant differences in tires across different Audi versions. The base models usually come with 205/55 R16, which offer lower fuel consumption but poorer comfort. Personally, I prefer 18-inch tires because they enhance the overall driving dynamics and make the car more stable. For daily use, pay attention to tire cleanliness—excessive dirt and dust can shorten their lifespan. I give them a simple brush wash every week. Also, don’t just go for cheap tires when choosing; brands like Pirelli are well-suited for sporty models.


