Tire Size 2017 Nissan Sentra

The 2017 Nissan Sentra, a popular compact sedan, offers a blend of fuel efficiency, practicality, and affordability. But beyond the marketing brochures lies a crucial element affecting its performance, handling, and overall driving experience: tire size. This seemingly simple specification encapsulates a wealth of engineering considerations. Let's delve into the technical aspects of the 2017 Sentra's tire sizing to understand its implications.

Understanding Tire Size Designations

Before we get into the specifics for the 2017 Sentra, it's crucial to decipher the language used to describe tire sizes. You'll typically see a code printed on the sidewall of the tire, for example, "205/55R16." Each part of this code holds significant information:

Section Width (205 in our example): This number represents the tire's width in millimeters at its widest point when properly inflated and mounted on a designated measuring rim. A wider tire generally offers more grip, but also increased rolling resistance, potentially impacting fuel economy.
Aspect Ratio (55 in our example): This is the ratio of the tire's sidewall height to its section width, expressed as a percentage. In this case, the sidewall height is 55% of 205mm. A lower aspect ratio (e.g., 45) indicates a shorter sidewall, which usually translates to improved handling and responsiveness, but can also result in a harsher ride. A higher aspect ratio (e.g., 65) provides more cushioning and a smoother ride but might sacrifice some cornering precision.
Construction Type (R in our example): This letter indicates the tire's internal construction. "R" stands for radial, which is the most common type of tire construction in modern vehicles. Radial tires feature cords that run radially across the tire, from bead to bead, improving strength and flexibility.
Rim Diameter (16 in our example): This number represents the diameter of the wheel rim in inches. The tire must be designed to fit this specific rim diameter.

2017 Nissan Sentra: Original Equipment (OE) Tire Sizes

The 2017 Nissan Sentra comes in several trim levels, and each trim level may have a different original equipment (OE) tire size. Understanding these differences is essential for maintaining the intended performance characteristics of the vehicle. The following are typical OE tire sizes for the 2017 Sentra:

S, FE+S: 195/65R15 - This size is typically found on the base model Sentras. The relatively narrow width (195mm) and high aspect ratio (65) prioritize fuel efficiency and ride comfort.
SV, SR, SL: 205/55R16 - These trims often come with this slightly wider and lower profile tire. The 205mm width offers a bit more grip than the 195, and the 55 aspect ratio provides a slightly sportier feel without significantly compromising ride quality.
SR Turbo: 215/45R17 - The SR Turbo, designed for enhanced performance, utilizes a wider (215mm) and lower profile (45) tire on a larger 17-inch wheel. This configuration maximizes grip and responsiveness, providing a more engaging driving experience.

Why Different Tire Sizes for Different Trims?

Nissan strategically chooses different tire sizes for various Sentra trims to align with the intended characteristics of each model. The base S and FE+S trims prioritize fuel efficiency and affordability. The narrower tires reduce rolling resistance, contributing to better gas mileage. The higher aspect ratio provides a softer ride, which is generally preferred by buyers in this segment. The SV, SR, and SL trims aim for a balance between comfort and handling, so they receive a slightly wider and lower-profile tire. The SR Turbo, being the performance-oriented model, receives the widest and lowest-profile tire to maximize grip, cornering ability, and responsiveness.

Consequences of Deviating from OE Tire Sizes

While you're not strictly limited to the OE tire sizes, deviating from them can have several consequences. Here's a breakdown of potential pros and cons:

Potential Upsides (with caveats):

Improved Grip (Wider Tires): A wider tire can indeed offer more grip, particularly in dry conditions. However, this often comes at the expense of increased rolling resistance, leading to reduced fuel economy. Furthermore, simply slapping on the widest tire that *fits* isn't a guarantee of improved performance. The suspension needs to be able to handle the increased forces, and the wheel offset must be correct to avoid rubbing.
Sharper Handling (Lower Aspect Ratio): Lower aspect ratio tires typically have stiffer sidewalls, which can reduce body roll and improve steering responsiveness. Again, this comes with a trade-off: a harsher ride. Be prepared to feel more bumps and imperfections in the road.
Aesthetic Appeal: Some owners choose to deviate from OE sizes purely for cosmetic reasons. Larger wheels and lower-profile tires can enhance the vehicle's appearance. However, aesthetics should never come at the expense of safety or functionality.

Potential Downsides:

Reduced Fuel Economy: Wider tires and lower aspect ratio tires typically have higher rolling resistance, leading to lower fuel economy.
Harsher Ride: Lower aspect ratio tires transmit more road vibrations to the cabin, resulting in a less comfortable ride.
Speedometer/Odometer Inaccuracies: Changing the overall tire diameter (the combined diameter of the wheel and tire) can affect the accuracy of the speedometer and odometer. This is because these systems are calibrated based on the original tire size. A significant change can lead to inaccurate readings.
ABS/Traction Control Malfunctions: Modern vehicles rely on wheel speed sensors for ABS and traction control systems. If the tire sizes are significantly different on the front and rear axles, it can confuse these systems, potentially leading to malfunctions.
Clearance Issues: Installing tires that are too large in diameter or width can cause them to rub against the fenders, suspension components, or brake lines. This can damage the tires, the vehicle, and compromise safety.
Warranty Implications: While not always the case, installing significantly different tire sizes *could* potentially void certain warranty claims related to the suspension or drivetrain. It's always best to check with your dealer.

Plus Sizing and Minus Sizing

Plus sizing involves increasing the wheel diameter while decreasing the aspect ratio of the tire, keeping the overall tire diameter roughly the same. For example, upgrading from a 195/65R15 to a 205/50R17 could be considered plus sizing. The benefit is a larger wheel and potentially improved handling. Minus sizing, conversely, involves decreasing the wheel diameter and increasing the aspect ratio. This can be useful for winter tires, where a narrower tire and higher sidewall can provide better traction in snow and ice. However, ensure adequate brake caliper clearance when downsizing.

Load Rating and Speed Rating

Beyond the size designation, tires also have load and speed ratings. The load rating indicates the maximum weight a single tire can carry at its maximum permissible speed. The speed rating indicates the maximum speed at which the tire is designed to be driven for extended periods. It is crucial to choose tires with load and speed ratings that meet or exceed the 2017 Sentra's specifications, which can be found on the tire placard (usually located on the driver's side doorjamb). Never install tires with lower load or speed ratings than recommended. Doing so can compromise safety and void warranties.

Recommended Tire Pressure

Maintaining proper tire pressure is paramount for optimal tire performance, fuel efficiency, and safety. The recommended tire pressure for your 2017 Nissan Sentra can be found on the tire placard. Always inflate tires to the recommended pressure, even if you've deviated from the OE tire size (within reasonable limits). Checking tire pressure regularly (ideally weekly) is essential, as pressure fluctuates with temperature changes. Using a reliable tire pressure gauge is critical for accuracy.

Conclusion

Choosing the right tire size for your 2017 Nissan Sentra involves understanding a complex interplay of factors, from ride comfort and fuel economy to handling and aesthetics. While deviating from the OE tire sizes can offer potential benefits, it's crucial to weigh the pros and cons carefully and ensure that any modifications are made safely and responsibly. Consulting with a qualified tire professional is always recommended to ensure you select tires that meet your specific needs and driving conditions, while also adhering to the vehicle's specifications and safety guidelines. Ultimately, the best tire size is the one that best suits your driving style, priorities, and the overall intended use of your 2017 Nissan Sentra.