Audi 8J TT RS Wheel & Tire Fitment Guide

Models Covered in This Guide

2009-2014 Audi TT RS (8J)

The second-generation Audi TT RS initially made its debut in 2009 as the first TT to get the "RS" treatment from Audi's high-performance sub brand. The 8J TT RS featured an all-new 2.5 liter turbocharged inline 5 cylinder, which has been praised by enthusiasts for its strong power band and iconic engine sound. With Audi's legendary Quattro AWD system, along with both manual and dual-clutch transmission options, the TT RS offers a ton of performance in a relatively light weight package. With the right modifications, these cars can be incredibly quick and competent both on the street and at the track.

Taking into consideration the Quattro AWD system and front-biased weight distribution of the TT RS, a rotatable square setup is a must to ensure a neutral handling balance and even tire wear at all four corners. Shedding unsprung weight by downsizing to an 18" wheel will also improve upon the overall handling, braking, and acceleration characteristics of the car.

Our 18x9" ET42 SM-10 compliments the 8J TT RS perfectly for both street and track use. With a 5x112 bolt pattern and a 57.1mm center bore, our VW/Audi-specific SM-10 provides a complete bolt-on fitment without the need for centering rings, spacers, or hub adapters. Designed with brake clearance as a priority, the 18x9" ET42 SM-10 can also clear the massive factory 4-piston 370mm front brakes with room to spare.

These fitments are ready-to-bolt-on, typically without any modifications, and provide a meaningful increase in wheel width over stock. The 18" fitments listed in this section are an ideal choice for the enthusiast who regularly drives their Audi on the street but still wants to participate in a few HPDE's as well. These fitments are a great match for a completely stock or lightly modified TT RS. With a focus on brake clearance, our 18" fitments are able to clear the standard 4-piston 370mm factory TT RS brakes with ease, as well as a variety of aftermarket BBK's. 

Front & Rear: 18x9” ET42 with 255/35-18 tires

• Available in Flow Formed SM-10 design only.
• Direct fit
• 255/40-18 tires can also be used as a direct fit.
• 265/35-18 tires can also be used but may require some additional negative camber when using more aggressive compounds.
• No additional wheel hardware is required (centering rings, hub adapters, spacers).

APEX Staff tire recommendations:

• All-Season: Michelin Pilot Sport AS4: 255/35-18, 265/35-18
• Performance Summer: Michelin Pilot Sport 4S: 255/35-18, 265/35-18
• Extreme Performance Summer: Bridgestone Potenza RE-71R: 255/35-18, 265/35-18 Hankook RS-4: 265/35-18 Falken Azenis RT660: 265/35-18
• R-Compound: Nitto NT01: 255/35-18, Michelin Pilot Sport Cup 2: 255/35-18, 265/35-18 Toyo Proxes R888R: 255/35-18, 265/35-18

These fitments are the perfect match for weekend track warriors and hardcore racers seeking to maximize the wheel and tire size that they can fit on their Audi TT RS. These aggressive wheel specs will occasionally require supportive modifications commonly found on track cars, such as increased negative camber. While certain configurations can provide a complete direct fit on a stock car, additional modifications may be required for a rub-free fitment depending on your suspension setup and specific tire selection. With a focus on brake clearance, our 18" fitments are able to clear the standard 4-piston 370mm factory TT RS brakes with ease, as well as a variety of aftermarket BBK's.

Front & Rear: 18x9.5” ET41 with 265/35-18 tires

• Available in Forged SM-10RS design only.
• Additional front and/or rear negative camber may be required when using more aggressive tire compounds.
• No additional wheel hardware is required (centering rings, hub adapters, spacers).

APEX Staff tire recommendations:

• All-Season: Michelin Pilot Sport AS4: 265/35-18
• Performance Summer: Michelin Pilot Sport 4S: 265/35-18
• Extreme Performance Summer: Bridgestone Potenza RE-71R: 265/35-18 Hankook RS-4: 265/35-18 Falken Azenis RT660: 265/35-18
• R-Compound: Michelin Pilot Sport Cup 2: 265/35-18 Toyo Proxes R888R: 265/35-18

Front & Rear: 18x9” ET42 with 245/40-18 tires

• 255/35-18 tires can also be used as a direct fit.
• No additional wheel hardware is required (centering rings, hub adapters, spacers).

APEX Staff tire recommendations:

• All-Season: Michelin Pilot Sport AS4: 245/40-18, 255/35-18

Whether you are a casual weekend track warrior that still enjoys your car on the street, or a hard core racer competing for a spot on the podium, negative camber is a vital part of chassis setup that has many benefits. Not only will adding negative camber create more room for wider wheel and tire configurations, it more importantly improves handling, turn-in and tire longevity. Learn more in our blog article, The Positives of Negative Camber.

Still have questions?

Fill out our Fitment Recommendation form Call us: 925-245-0773 Email us: support@apexraceparts.com