235-45-17

[bobbycos]

could this thread be stickied since it has excellent tire size info

[dysfunk]

Here's more information, based on my tire.

195/60/14:

Diameter: 23.21in / 590mm
Circumference: 72.93in / 1850mm
Sidewall: 4.61in / 117mm
Tread: 7.68in / 195mm


Next, I'm going to give information on a 215/45/17 to show you the difference.

215/45/17:

Diameter: 24.56in / 624mm
Circumference: 77.16in / 1960mm
Sidewall: 3.78in / 96mm
Tread: 8.46in / 215mm


Here's the difference between the two tires.

Diameter: 1.35in / 34mm
Circumference: 4.23in / 107mm
Sidewall: -0.83in / -21mm
Tread: 0.79in / 20mm

The 215/45/17 is 5.8% larger than the 195/60/14. Speedometer will read 60 mph / 100 km/h when actual speed would be 63.48 mph / 105.8 km/h





Now, let's take a look at the difference between the 195/60/14 and the 235/45/17

195/60/14:

Diameter: 23.21in / 590mm
Circumference: 72.93in / 1850mm
Sidewall: 4.61in / 117mm
Tread: 7.68in / 195mm



235/45/17:

Diameter: 25.27in / 642mm
Circumference: 79.39in / 2017mm
Sidewall: 4.13in / 105mm
Tread: 9.25in / 235mm


Difference:

Diameter: 2.06in / 52mm
Circumference: 6.46in / 164mm
Sidewall: -0.47in / -12mm
Tread: 1.57in / 40mm





The 235/45/17 tire is 8.85% larger than the 195/60/14 tire. The speedometer will display 60 mph / 100 km/h when actual speed would be 65.31 mph / 108.85 km/h



I hope this has helped you guys. I really do suggest downloading a tire calculator. But if anyone needs any help, feel free to PM me. I'll help with tire size differences. No questions about rims, please.

[AccordWarrior]

Here's more information, based on my tire.

195/60/14:

Diameter: 23.21in / 590mm
Circumference: 72.93in / 1850mm
Sidewall: 4.61in / 117mm
Tread: 7.68in / 195mm


Next, I'm going to give information on a 215/45/17 to show you the difference.

215/45/17:

Diameter: 24.56in / 624mm
Circumference: 77.16in / 1960mm
Sidewall: 3.78in / 96mm
Tread: 8.46in / 215mm


Here's the difference between the two tires.

Diameter: 1.35in / 34mm
Circumference: 4.23in / 107mm
Sidewall: -0.83in / -21mm
Tread: 0.79in / 20mm

The 215/45/17 is 5.8% larger than the 195/60/14. Speedometer will read 60 mph / 100 km/h when actual speed would be 63.48 mph / 105.8 km/h





Now, let's take a look at the difference between the 195/60/14 and the 235/45/17

195/60/14:

Diameter: 23.21in / 590mm
Circumference: 72.93in / 1850mm
Sidewall: 4.61in / 117mm
Tread: 7.68in / 195mm



235/45/17:

Diameter: 25.27in / 642mm
Circumference: 79.39in / 2017mm
Sidewall: 4.13in / 105mm
Tread: 9.25in / 235mm


Difference:

Diameter: 2.06in / 52mm
Circumference: 6.46in / 164mm
Sidewall: -0.47in / -12mm
Tread: 1.57in / 40mm





The 235/45/17 tire is 8.85% larger than the 195/60/14 tire. The speedometer will display 60 mph / 100 km/h when actual speed would be 65.31 mph / 108.85 km/h



I hope this has helped you guys. I really do suggest downloading a tire calculator. But if anyone needs any help, feel free to PM me. I'll help with tire size differences. No questions about rims, please.

Great information here, but one small point of interest for you. The DX/LX have 185/70-14 tires stock, while the EX/SE/all other models with 15" wheels have 195/60-15 stock.

Also, here's a great web-based app that shows graphically what you are doing.

miata.net Tire Size Calculator