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235 vs. 245 Tires: Difference Between 235 and 245 Tires

Tires play a vital role in a vehicle’s overall performance and safety. One crucial aspect to consider when choosing the right tires is the tire width. The tire’s width significantly affects various aspects of the vehicle’s performance, such as handling, stability, and grip on the road. In this article, we will explore the difference between 235 and 245 tires, exploring their impact on performance, and addressing whether one can replace 235 tires with 245 tires or vice versa.

Understanding Tire Width

The first number in the tire size designation denotes tire width. For instance, in the case of a tire size of P235/65R17, the width is represented by the value 235. This number indicates that the tire has a width of 235 millimeters. It’s worth noting that tire width is measured at its widest point, which is usually the tread section.

Difference Between 235 and 245 Tires

Overview of Tire Sizing

Tire sizing can be a complex topic, with various numbers and letters used to denote different parameters. However, for the purpose of this article, we will primarily focus on the difference between 235 and 245 tires in terms of their width.

Width Comparison: 235 vs. 245 Tires

When comparing the width of 235 and 245 tires, the main difference lies in the actual width of the tires. A 235 tire is narrower compared to a 245 tire. The width variance between these two tire sizes is 10 millimeters. This might not seem like a significant difference, but it can affect the vehicle’s performance and handling characteristics.

Effects on Performance and Handling

The width of a tire directly impacts its contact patch with the road. A wider tire, such as a 245 tire, generally provides a larger contact patch, improving traction and grip. This can enhance the vehicle’s handling capabilities, especially during cornering and braking maneuvers. On the other hand, a narrower tire, like a 235 tire, may offer slightly better fuel efficiency due to reduced rolling resistance.

Can I Replace 235 Tires with 245 Tires?

Many vehicle owners wonder whether they can replace their 235 tires with 245 tires. While it is technically possible to make this switch, several factors must be considered before doing so.

Factors to Consider

  1. Vehicle Specifications: The first and foremost consideration is your vehicle’s specifications. Check your vehicle’s manual or consult a professional to determine the recommended tire sizes for your specific make and model.
  2. Wheel Size: It’s vital to ensure your wheels can accommodate the wider 245 tires. The rims need to have sufficient clearance for the increased width to avoid any rubbing or interference with suspension components.

Compatibility and Safety

Swapping 235 tires with 245 tires may be compatible in some cases, especially if the vehicle manufacturer allows for a range of tire sizes. However, it’s crucial to prioritize safety. Always consult a tire professional or refer to the manufacturer’s guidelines to ensure the new tire size is safe and appropriate for your vehicle.

Impact on Vehicle Performance

Replacing 235 tires with 245 tires can potentially affect your vehicle’s performance. The wider tires may alter the handling characteristics, responsiveness, and overall feel of the vehicle. Testing the new tire size under different driving conditions is recommended to assess any changes and determine if it meets your expectations.

Can I Replace 245 Tires with 235 Tires?

On the other hand, some individuals might consider downsizing their tires from 245 to 235. While this is possible, it’s essential to consider the following aspects.

Considerations for Downsizing

  1. Vehicle Compatibility: Just like upsizing, downsizing should be done within the limits set by the vehicle manufacturer. Refer to the owner’s manual or consult a tire professional to determine the acceptable range of tire sizes for your specific vehicle.
  2. Handling and Stability: Downsizing to a narrower tire, such as 235, may reduce traction and stability. The vehicle’s handling characteristics could be affected, particularly during aggressive maneuvers or adverse weather conditions.

Potential Issues and Limitations

Downsizing tires may also lead to potential issues and limitations. For example, the narrower tire might not be able to handle the same load capacity as the wider tire. Additionally, changing the tire size could affect the accuracy of the speedometer and odometer readings, calibrated for specific tire sizes.


In conclusion, the difference between 235 and 245 tires lies in their width, which is 10 millimeters wider than the former. While it is possible to replace 235 tires with 245 tires or vice versa, it’s essential to consider factors such as vehicle specifications, wheel clearance, compatibility, and safety. Upsizing or downsizing tires can have implications for performance, handling, and other aspects of your vehicle. Always consult with professionals and refer to manufacturer guidelines to ensure the best fit for your specific vehicle.


Can I use 235 tires on 245 rims?

No, using narrower tires on wider rims is generally not recommended, as it can affect tire performance and safety.

Is it safe to use wider tires than recommended?

Using wider tires than the vehicle manufacturer recommends can lead to clearance issues, affecting handling, and potentially compromising safety.

Will changing tire width affect my speedometer accuracy?

Changing tire width can impact speedometer accuracy, as the readings are calibrated based on the original tire size. It’s advisable to consult a professional to recalibrate the speedometer if necessary.