Tire Treadwidth Dilemma: Apex 601 Vs. Falken RT660 - Explained!

Is the world of tire specifications a minefield of conflicting data, or a precise science that demands adherence to manufacturer guidelines? Navigating the nuances of tire dimensions can significantly impact both performance and passenger comfort, making informed choices paramount for any discerning driver.

A recent conversation with a Tire Rack expert highlighted a common point of confusion: the variance in tread width measurements across different tire manufacturers. The specific example involved the 275/35/18 Apex 601 tires, where Tire Rack's website listed a tread width of 9.5 inches, while Yokohama's specifications showed 9.4 inches. The expert's advice, unsurprisingly, was to defer to the manufacturer's specifications. This seemingly simple directive, however, opens a Pandora's Box of considerations, particularly when comparing different tire sizes and brands.

The individual's current setup features 265 Azenis 615 tires, which, surprisingly, measure wider (9.5 inches) than the potential 275 Apex tires. This paradox underscores the fact that tire sizes are not always directly proportional to their advertised widths. The actual dimensions can vary based on the specific tire model and manufacturer's design. This discrepancy immediately brings up the question: How does the difference in tire size impact the overall performance of the car?

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The primary concern for this driver, beyond pure performance, is passenger comfort. The choice of tire can considerably affect the ride quality. Wider tires, while often providing enhanced grip and stability, can sometimes lead to a harsher ride, especially on less-than-perfect road surfaces. The decision of whether to prioritize the raw performance characteristics of a tire or the comfort of its passengers highlights the inherent conflict between driving enthusiasm and everyday usability.

The prospect of switching to a shorter tire size looms in the future, suggesting a potential shift in driving dynamics and handling characteristics. This would further change the vehicle's profile. A shorter tire profile will often affect the overall gearing and handling of the car, demanding a reevaluation of the suspension setup and, potentially, a re-calibration of the vehicle's systems to maintain optimal performance. The shift emphasizes the importance of considering the broader implications of any tire selection.

Many enthusiasts have their own views and experiences with these tires in the context of autocross or track use, utilizing various wheel and tire combinations to optimize their car's performance. The information given in the references highlight the experience of a few people, and the performance these tires offer. For example, an autocross enthusiast's setup includes 19-inch Motegi MR924 wheels with a +53 offset, paired with beefy 275/35 RT660 tires. These tires are known for their meaty sidewalls, which provide a significant amount of grip and aid in handling on the track.

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The Falken Azenis RT660, in the 275/35R18 size, is another popular choice. This tire boasts a diameter of 25.6 inches, a width of 11.2 inches, and mounts on an 18-inch rim. It features 811 revolutions per mile. The tire's design prioritizes rigid steering response and peak performance when required. This makes it a suitable tire for track use, providing maximum traction and predictable handling.

When the time comes to get new 275/35R18 tires, Tire Rack is a reliable source for purchasing these tires, offering expertise and assistance in choosing the correct tire.

The Azenis RT660 is a tire designed for track use, often found on cars in a racing environment. With 200 AA UTQG rating, the RT660 is designed to meet the needs of high-performance driving, ensuring predictable response on the road, and a high level of traction. The 275/35R18 RT615K+ is another tire option, with similar properties to the RT660, along with Swift springs and front camber for added performance. Cars such as the Nissan 350Z (2005) and Honda Civic Type R FK8 (2019) frequently use these tires in race settings, with the 275/35 RT660 tire.

The seemingly minor detail of tire width can have a cascading effect on the overall driving experience. This will affect the level of comfort for passengers.

The question is, which choice is the correct choice for this driver, and how does each specification of tire affect both the driving dynamics and comfort level of the vehicle.