The 2018 Audi TTS Quattro sits in the modern sport compact category with a strong emphasis on sharp response, all-wheel-drive traction, and tightly tuned road manners. It is a car whose stance and handling character depend heavily on getting the tire size right, especially when wheel diameter changes are part of the factory fitment range. This model uses radial tires in either 245/35R19 or 255/30R20, both low-profile metric sizes tied to 19-inch or 20-inch wheels. That makes the real choice less about vintage-style construction and more about confirming the wheel setup, then comparing available tire series and specifications that suit the car's intended street use.
Which Tire Size Is Right for The 2018 Audi TTS Quattro
The 2018 Audi TTS Quattro uses two primary tire sizes, and the first step is confirming whether the car is running 19-inch or 20-inch wheels. Both sizes are radial metric fitments, and the Base sub-model can use either one, so tire selection starts with wheel diameter before comparing the available product choices within the correct size.
245/35R19 is a modern metric radial size in which 245 is the nominal section width in millimeters, 35 is the aspect ratio, R identifies radial construction, and 19 is the wheel diameter in inches. On the 2018 Audi TTS Quattro, this size supports the car's low-profile performance-oriented setup on a 19-inch rim. Available choices in this size include BFGoodrich and Nitto products, all with Blackwall sidewalls, across tire series such as g-Force Comp 2 AS, NT555 G2, and g-Force Phenom T/A. This is the size to evaluate when the car is equipped with 19-inch wheels and the goal is staying with the proper wheel-and-tire relationship.
255/30R20 is also a modern metric radial size, with 255 indicating nominal section width in millimeters, 30 indicating the aspect ratio, R for radial construction, and 20 for the wheel diameter in inches. For the 2018 Audi TTS Quattro, this fitment belongs to a 20-inch wheel setup and carries an even lower-profile presentation than the 19-inch option. The practical importance of this size is wheel confirmation, since a 20-inch tire cannot be selected interchangeably with a 19-inch fitment. Owners choosing this size should verify the actual wheel package on the car before comparing tire options.
Sub-model fitment is straightforward here because the 2018 Audi TTS Quattro Base is the covered configuration. Tire choice still requires attention, though, because the Base model can use either of the two primary sizes depending on whether the car is equipped with 19-inch or 20-inch wheels.
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2018 Audi TTS Quattro Base
The 2018 Audi TTS Quattro Base uses radial tires and can be equipped with either the 245/35R19 or 255/30R20 fitment. That means the key step is confirming the wheel diameter on the car, then selecting a tire that matches the intended balance of specification, series, and road-use priorities.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2018 Audi TTS Quattro Tires for Sale
Available 245/35R19 choices for the 2018 Audi TTS Quattro come from BFGoodrich and Nitto, with Blackwall styling throughout. The main differences in the product grid are tire series, radial design focus, rim-width specifications, weight, and related performance-oriented construction details.
These FAQs focus on the exact tire sizes used on the 2018 Audi TTS Quattro, how to confirm the correct wheel fitment, and how to compare the available radial tire choices for appearance, setup, and road use.
Tire Size & Fitment
What tire size fits a 2018 Audi TTS Quattro?
The 2018 Audi TTS Quattro uses two primary tire sizes: 245/35R19 and 255/30R20. Both are radial metric fitments, and the Base sub-model can use either one depending on the wheel package on the car.
The important distinction is wheel diameter. A 245/35R19 belongs on a 19-inch wheel, while a 255/30R20 belongs on a 20-inch wheel. Before choosing a tire, check the actual wheel size currently installed, especially if the car has had wheel changes, since selecting by vehicle alone is not enough when more than one factory-size fitment applies.
What size rim does a 2018 Audi TTS Quattro use?
A 2018 Audi TTS Quattro uses either a 19-inch or 20-inch rim, depending on which of its two tire sizes is on the car. The 245/35R19 fitment uses a 19-inch rim, and the 255/30R20 fitment uses a 20-inch rim.
Rim diameter is the first thing to confirm because the two tire sizes are not interchangeable across those wheels. Once diameter is confirmed, it also helps to check wheel width and the current tire markings on the sidewall. That is especially useful on a performance car like the TTS Quattro, where low-profile fitment leaves less room for error in size selection.
Why does the 2018 Audi TTS Quattro have more than one tire size?
The 2018 Audi TTS Quattro has more than one tire size because it can be equipped with different wheel diameters. Its primary fitments are 245/35R19 and 255/30R20, both radial sizes matched to different wheel setups on the same model.
That means the right choice depends on the actual wheels installed on the car, not simply the model name. Looking at the current tire sidewall, measuring wheel diameter, and checking whether the car is still on its original wheel package can prevent ordering the wrong size. This matters even more if the vehicle has seen aftermarket wheel changes during ownership.
Choosing the Right Tire
What should I consider when choosing a 245/35R19 tire for a 2018 Audi TTS Quattro?
Start with the correct size, then compare the details that separate one 245/35R19 radial from another. For the 2018 Audi TTS Quattro, available options in this size vary by brand, tire series, rim-width specification, weight, and related performance-oriented design attributes.
A useful selection process is to confirm the wheel width first, then consider how the car is actually used. A street-driven TTS Quattro may call for different priorities than a weekend car focused on aggressive driving feel. Blackwall styling is consistent across the current choices, so the bigger differences come from series character and the supporting specifications shown with each tire.
What brands offer tires for the 2018 Audi TTS Quattro?
BFGoodrich and Nitto offer tires for the 2018 Audi TTS Quattro in the available 245/35R19 fitment. BFGoodrich appears in more than one tire series here, while Nitto is also represented with a performance-oriented radial option.
Brand alone should not decide the purchase. It makes more sense to compare the exact tire series, size match, rim-width compatibility, and the way each option aligns with the car's intended use. On a low-profile modern fitment, those details matter more than choosing by name only, particularly when the car's wheel setup and driving priorities are already fairly specific.
What tire series are available for the 2018 Audi TTS Quattro?
The 2018 Audi TTS Quattro has 245/35R19 tire options in several series, including BFGoodrich g-Force Comp 2 AS, Nitto NT555 G2, and BFGoodrich g-Force Phenom T/A. All of them are radial Blackwall tires sized for the same 19-inch fitment.
Series differences help separate one choice from another when the basic size is already settled. Comparing the tire series alongside rim-width specification, weight, and any load information shown with the product can narrow the field more effectively than size alone. That is especially helpful for owners trying to match the car's tire choice to a specific street-driving or enthusiast-use goal.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Audi TTS Quattro?
Yes, modifications can affect tire fitment on a 2018 Audi TTS Quattro. Wheel changes, altered offsets, suspension lowering, and other setup changes can all influence how a low-profile tire sits in the wheel opening and how much clearance remains during steering and suspension movement.
That matters because this model already uses short-sidewall radial sizes on either 19-inch or 20-inch wheels. Even when the sidewall marking matches one of the primary sizes, the car should still be checked for wheel width, brake clearance, fender room, and contact at full lock or compression. Modified cars need to be evaluated by their actual setup, not by model designation alone.
What should I inspect before driving a 2018 Audi TTS Quattro on new tires?
Before driving a 2018 Audi TTS Quattro on new tires, inspect the wheel diameter and tire size match, then confirm proper mounting, inflation, and general tire condition. It also helps to check for any visible interference around the suspension, inner fender, and steering range once the tires are installed.
A short test at low speed can reveal rubbing, vibration, or other setup issues before the car is driven harder. On a performance-oriented all-wheel-drive car, it is also wise to look at overall tire consistency across the set and make sure the wheels are in sound condition. Those basic checks support both fitment accuracy and road confidence.
What should I check before a longer drive in a 2018 Audi TTS Quattro?
Before a longer drive in a 2018 Audi TTS Quattro, check tire pressure, tread condition, sidewall condition, and any signs of cuts, bulges, or air loss. The car should also be on the correct tire size for its wheel diameter, whether that is 245/35R19 or 255/30R20.
A longer trip is also a good time to confirm that the wheels are free from damage and that no rubbing appears under load or during full steering travel. Because the TTS Quattro uses low-profile radial tires, small fitment or condition issues can become more noticeable at speed. Regular inspection helps catch problems before they interrupt the drive.
