There are several tire sizes available for the 18×9.5 rims, including 265/40 R18 R18, 275/35 R18, and P 255/45 R18. It’s important to note that while 235/40 R18 is the smallest tire that can fit on this rim, and 295/35 R18 is the widest, neither of these sizes is the ideal fit. To achieve the best performance and appearance, we recommend using a 265/35 R18 tire, which is 20mm wider than the rim.
These are not the full list of tires for 18×9.5 rims. So, what are the other tire sizes? Find out more by reading on.
List of Compatible Sizes For 18×9.5 Rims
There is a number of tire sizes that can fit on 18×9.5 inches rims. All tire sizes that can be used with this rim size are listed in the following table.
| Tire Size | Wheel Diameter | Compatible Cars |
| 235/40 R18 | 25.4″ | CT4 (2020-2022), CT4-V (2022), ProMaster City (2015-2018), S60 (2004-2018), S80 (1999-2016), V60 (2015-2018), C70 (2006-2013), V70 (2001-2007), S60 Inscription (2016-2018), Volkswagen- CC (2009-2017), Eos (2007-2014), Passat (2006-2010), Scirocco (2009), Marcedez Benz- C-Class (2014), Mercedezs (2014-2017), E-Class AMG CLA (2016-2017), AMG CLA45 (2016-2017), Maserati- Coupe, Spyder, Elantra HEV (2021-2022), Ford-Focus (2011-2018), Focus Electric (2012-2018), Audi, Acura |
| 255/35R18 | 26” | Subaru WRX Base, Honda Civic Sport, Subaru WRX STI Base, Honda Civic Si, Subaru WRX STI Limited |
| 255/40R18 | 27” | Tesla 3 Standard Plus, Subaru WRX STI Base, Toyota Corolla XSE, Nissan 370Z Sport Touring STAGGERED, Subaru WRX Base, Subaru WRX STI Limited |
| 255/45R18 | 25.1 | Ford Mustang GT Premium, Tesla 3 Standard Plus, Toyota Corolla XSE |
| P 255/45 R18 | 27.0″ | Audi A4, Audi A5, Audi A6, BMW 5 Series, BMW 7 Series, Infiniti Q50, Infiniti Q70, Lexus LS, Mercedes-Benz E-Class, Mercedes-Benz S-Class, Porsche 911, Porsche Cayman, Porsche Panamera, Volvo S90, Volvo V90 |
| 265/35 R18 | 25.3″ | Acura NSX, Audi S4, Audi S5, Audi S6, Audi S8, BMW M3, BMW M4, BMW M5, BMW M6, Cadillac ATS-V, Cadillac CTS-V, Chevrolet Camaro, Chevrolet Corvette, Dodge Charger, Dodge Challenger, Lexus GS, Lexus IS, Lexus LC, Mercedes-Benz AMG GT, Mercedes-Benz C-Class, Mercedes-Benz CLA-Class, Mercedes-Benz CLS-Class, Mercedes-Benz SL-Class, Mercedes-Benz SLC-Class, Nissan GT-R, Porsche 911, Porsche Boxster, Porsche Cayman |
| 275/35 R18 | 25.6″ | Audi RS4, Audi RS5, Audi RS6, Audi RS7, BMW M3, BMW M4, BMW M5, BMW M6, Cadillac CTS-V, Chevrolet Camaro, Chevrolet Corvette, Dodge Challenger, Dodge Charger, Lexus RC F, Mercedes-Benz AMG GT, Mercedes-Benz C-Class, Mercedes-Benz CLS-Class, Nissan GT-R, Porsche 911, Porsche Cayman |
| 295/35 R18 | 26.1″ | Audi RS6, Audi RS7, Chevrolet Camaro, Chevrolet Corvette, Dodge Challenger, Dodge Charger, Ford Mustang, Mercedes-Benz AMG GT, Nissan GT-R, Porsche 911 |
| 255/40 R18 | 26.0″ | Audi S4, Audi S5, BMW 3 Series, BMW 4 Series, BMW 5 Series, BMW 6 Series, BMW 7 Series, Infiniti Q50, Lexus GS, Lexus IS, Lexus LS, Lexus RC, Mercedes-Benz C-Class, Mercedes-Benz CLS-Class, Porsche 911, Porsche Boxster, Porsche Cayman |
| 265/40 R18 | 26.4″ | Audi RS4, Audi RS5, Audi TT RS, BMW 3 Series, BMW 4 Series, BMW M2, BMW M3, BMW M4, Chevrolet Camaro, Dodge Challenger, Lexus GS, Lexus IS, Lexus RC F, Mercedes-Benz AMG GT, Mercedes-Benz C-Class, Mercedes-Benz CLS-Class, Mercedes-Benz SLK-Class, Porsche 911, Porsche Boxster, Porsche Cayman |
| 245/45 R18 | 26.7″ | Acura RLX, Audi A6, BMW 5 Series, Infiniti Q70, Lexus ES, Lexus GS, Lexus LS |
The wheel diameter here represents the overall diameter of the wheel after the tire is installed. And, apart from the diameter, are you excited about choosing a sheen for the wheels? Then, read about Satin Black vs. Matte Black vs. Gloss Black Wheels.
What Is the Smallest Tire on 18×9.5 Rims?
The smallest tire that can fit on 18×9.5 rims is typically a 205/35 R18 tire. This tire size offers a narrow and low-profile design that can enhance the performance and appearance of the vehicle. However, it’s essential to note that fitting the smallest tire possible can also have drawbacks, including reduced ride comfort, decreased grip, and increased risk of wheel damage.
It should also be kept in mind that unduly wide rims on a car tend to give a harsh ride because their sidewalls lack enough curvature to flex over bumps and potholes. Therefore, this setup is not recommended at all.
What Is the Widest Tire on 18×9.5 Rims?
The widest tire that is recommended for use on a 18×9.5 inch rim is typically a P 275/35 R18 tire. It is possible to use 295/35 R18 tires, but it is not recommended. However, it is important to note that using a wider tire than the recommended size can lead to potential safety hazards and issues with vehicle performance. Here is a table summarizing some of the potential benefits and drawbacks of using a wider tire on a 18×9.5 inch rim:
| Potential Benefits | Potential Drawbacks |
| 1. Improved traction and handling 2. Better appearance and stance 3. Increased tire contact patch 4. Improved braking performance | 1. Uneven tire wear 2. Reduced vehicle stability 3. Potential tire bulge and blowout 4. Inaccurate speedometer and odometer readings |
It is important to weigh these potential benefits and drawbacks carefully when considering using a wider tire than recommended on your vehicle.
Apart from the sizing and ratios, it’s important to know how to rotate your tires. Read more about what happens if you don’t rotate your tires.
What Is the Best Fit Tire on 18×9.5 Rims?
265/35 R18 is the best-fit tire on 18×9.5 rims according to the rule of thumb. The general rule of thumb is you can fit 20 mm wider than the rims. If you convert the tire width 9.5” to millimeter it would be 241”. And, if you add 20 mm to this it’ll be 261 mm. Furthermore, the nearest best-fit tire size is 265/35.
The sidewall of this tire is 35% of 265mm after calculating and converting to inches it’ll be 3.65”. So, It’s a low-profile tire. This setup has a lot of benefits and some drawbacks as well. Now, find the pros and cons of this setup in the table below.
| Pros | Cons |
| 1. Improved aesthetics 2. Great handling 3. Improved braking 4. Better cornering handling 5. Increase acceleration | 1. Reduced fuel efficiency 2. Poor ride quality 3. Less durable |
FAQs
How Do You Match Tire To Wheel Size?
When matching tires to wheel size, the two key factors to consider are width and diameter. For diameter, it’s essential to ensure that the tire and wheel are an exact match. This means that a tire with a size of 215/65R17 will only fit on a 17″ diameter wheel. However, there is more flexibility when it comes to wheel widths.
What Happens If You Put Too Wide Of A Tire On A Rim?
If you put a tire that is too wide on a rim, you run the risk of the tire ripping away at high speeds. It is recommended that the rim width is 70% of the tire’s section width, rounded off to the nearest 0.5. For example, a 255/50R16 tire with a design section width of 10.04 inches should be mounted on a rim width of no more than 7.03 inches.
Which Tire Is Taller 245 Or 275?
The 275 tire size is taller than the 245 tire size. The 275 tire has a diameter that is approximately 30 mm larger than the 245 tires. The aspect ratio, or the ratio of the tire’s height to its width, also affects the tire’s overall height. Additionally, the 275 tire has a larger sidewall height while maintaining the same aspect ratio.
Conclusion
Well, we’ve mentioned all the 18×9.5 Tire Sizes. However, most of these sizes are not recommended as long as it doesn’t meet your specific goal. Before choosing a tire size, always consider the purpose and driving condition. For more understanding consult a professional automobile mechanic.
Thanks for reading!
