Finding the perfect tire size for your Ford Focus is essential for ensuring fuel efficiency. Whether you’re replacing worn tires or upgrading for enhanced handling, knowing what size tire for Ford Focus is ideal to making the right choice.

This blog covers everything you need to know, from trim-specific tire sizes to tread design and performance considerations.

What Size Tire for Ford Focus?

The tire sizes for a Ford Focus depend on the model year and trim level. Here are common sizes:

P195/65R15: Standard for base models, offering a balance of comfort and affordability.
P215/55R16: Often found on mid-level trims, providing improved handling and stability.
P235/40R18: Popular for sportier trims, offering enhanced cornering and road grip.

Trim Levels and Tire Sizes

Trim level significantly influences tire size for the Ford Focus:

S Trim: Typically fitted with P195/65R15 tires for a smooth ride and good fuel efficiency.
SE Trim: Upgraded to P215/55R16 for better handling and a slightly sportier appearance.
ST or Titanium Trims: Often equipped with P235/40R18 tires to deliver sharper handling and a more aggressive look, perfect for enthusiasts.

Decoding Tire Numbers for a Ford Focus

Let’s break down P235/40R18 95V as follows:

P: Passenger vehicle tire.
235: Width of the tire in millimeters, measured sidewall to sidewall.
40: Aspect ratio, indicating the sidewall height as 40% of the tire’s width.
R: Radial construction, the most common tire type.
18: Diameter of the rim in inches.
95: Load index, meaning the tire can support up to 1,521 pounds when properly inflated.
V: Speed rating, allowing the tire to handle speeds up to 149 mph (240 km/h).

By decoding these numbers, you ensure the tire you choose matches your Ford Focus’s requirements.

How Rim Width and Diameter Affect Tire Sizes for Ford Focus

The rim’s width and diameter play a significant role in determining tire compatibility:

Rim Width: Standard sizes for the Ford Focus range from 6.0 to 8.0 inches. Ensuring the tire width matches the rim width prevents uneven wear and performance issues.
Rim Diameter: Common sizes include 15-inch, 16-inch, and 18-inch rims. Larger rims, such as 18-inch, require low-profile tires (e.g., P235/40R18) for better handling, while smaller rims allow for higher-profile tires, offering a more comfortable ride.

Speed Ratings and Load Capacity

Speed and load specifications are critical for safety and performance:

Speed Ratings: Indicate the maximum speed a tire can safely handle:
- H (130 mph): Standard for many mid-level trims.
- V (149 mph): Found on sport-focused tires for higher performance.

For example, P235/40R18 95V tires offer a load index of 95 (1,521 lbs) and a V speed rating (149 mph), suitable for high-performance trims like the Focus ST.

Load Capacity: Typical tires for the Focus range from 91 (1,356 lbs) to 95 (1,521 lbs). Always choose tires that meet or exceed the vehicle’s load requirements, especially when carrying passengers or heavy cargo.

Conclusion

When determining what size tire for Ford Focus, it’s essential to consider your trim level, tire dimensions, rim compatibility, and performance requirements. From understanding tire numbers to ensuring the right tread design and speed rating, every detail plays a role in optimizing your Focus’s performance.