The Azenis RT660 is Falken's Extreme Performance Summer tire developed for motorsports enthusiasts, participants in track days, or any driver looking for competition-ready levels of dry traction and handling. The Azenis RT660 is designed to provide maximum performance in warm, dry to damp conditions, and like all Extreme Performance Summer tires, it is not intended to be serviced, stored, nor driven in near-and below-freezing temperatures, through snow or on ice.
Utilizing a motorsports-inspired tread compound enhances the traction delivered by the Azenis RT660 for acceleration, braking, and handling in dry and wet conditions. The low-void, symmetric pattern maximizes the rubber in contact with the surface. Massive shoulders deliver extreme levels of lateral grip, and the broad, continuous center rib provides solid on-center feel and longitudinal traction for acceleration and braking. Deep, circumferential grooves and full-depth notches help evacuate water from the contact patch to enhance hydroplaning resistance.
The internal construction of the Azenis RT660 features a two-ply, polyester casing utilizing Falken's Crosshatch Carcass design to enhance handling and stability. Two wide, steel belts support the tread area and are reinforced by two polyamide cap plies to further improve handling and high-speed capability.
Note: Tires exposed to temperatures of 20 degrees F (-7 degrees C) or lower must be permitted to gradually return to temperatures of at least 40 degrees F (5 degrees C) for at least 24 hours before they are flexed in any manner, such as by adjusting inflation pressures, mounting them on wheels, or using them to support, roll or drive a vehicle.
Flexing of the specialized rubber compounds used in Extreme Performance Summer tires during cold-weather use can result in irreversible compound cracking. While compound cracking is not a warrantable condition because it occurs as the result of improper use or storage, tires exhibiting compound cracking must be replaced.
Related Information: Can Tires Be Shaved For Autocross / Track Use / Competition? | What Tire Air Pressure Do I Use For Track And Autocross? | How Do I Store Track & Competition DOT Tires In Cold Temperatures?
EP tires wear two distinct hats. They’re great on sporty and high horsepower vehicles conquering the everyday road and on those same vehicles as they dominate in various races and track days. The nuances here are many as increased traction and performance in one of these arenas can mean a tradeoff elsewhere. This two-part test lays it all bare and reveals just how close, but different, this category can be!
(522)Tire Category: Extreme Performance Summer
| Best in Category |
| Miles Reported |
| Recommended |
| Treadwear |
Falken Azenis RT660
|
|---|
| 89% |
| 1.2M |
| 8.1 - Good |
| 6.1 - Fair |
|
|
| 9.1 - Excellent |
|
|
| N/A |
|
|
| 7.0 - Good |
|
|
| 6.7 - Good |
Reviews highlight excellence in dry traction, with drivers praising exceptional grip, precise steering response, and confidence during track days, autocross, and HPDE events. Wet performance receives positive marks for predictable handling in light rain, though some note reduced traction in standing water. Treadwear draws mixed feedback-many appreciate durability through multiple heat cycles and track sessions, while others report premature wear or chunking under aggressive use. Enthusiasts value the AD09's balance of track-focused performance and street usability, though its true strengths shine in dry, high-demand driving scenarios where consistent grip and communication are paramount.
AI-generated from the text of customer reviews
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EP tires wear two distinct hats. They’re great on sporty and high horsepower vehicles conquering the everyday road and on those same vehicles as they dominate in various races and track days. The nuances here are many as increased traction and performance in one of these arenas can mean a tradeoff elsewhere. This two-part test lays it all bare and reveals just how close, but different, this category can be!
Read the Full Test Report
EP tires wear two distinct hats. They’re great on sporty and high horsepower vehicles conquering the everyday road and on those same vehicles as they dominate in various races and track days. The nuances here are many as increased traction and performance in one of these arenas can mean a tradeoff elsewhere. This two-part test lays it all bare and reveals just how close, but different, this category can be!
In this first ever, in-person episode of “TJ Talking,” our Tire Information and Testing Manager, TJ Campbell, meets up with Bakari Howard and Tsuyoshi Johnson from Falken Tire to talk about the Falken Azenis RT660. The Falken team talks about what they foresee in RT660’s future, maximizing the tire’s performance, and differences between the RT660 and its competition.
The Azenis RT660 is consistently at or near the top of our testing, so we used it as a benchmark for the newest competitors on the market.
Read the Full Test Report
The Azenis RT660 is consistently at or near the top of our testing, so we used it as a benchmark for the newest competitors on the market.
Read the Full Test Report
Falken’s Azenis RT660 is new for 2020, and previous testing shows it can hold its own with the fastest in the category. We see how it compares to the newest from one of the biggest names in the industry.
Read the Full Test Report
Along with the thrilling ride provided by Extreme Performance Summer tires, the Falken Azenis RT660 is designed to deliver predictable handling along with maximum traction both on and off the track.
The new Falken Azenis RT660 is designed to compete with the fastest tires in the category, so we compared it to the newest and best to see how it performs in the real world.
Read the Full Test Report
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