Timberline Wheels on ST

[Eltee]

Baby Got New Shoes For Christmas!

Found an almost unused set of Timberline wheels and tires for my 2022 ST. They fit perfectly and IMHO look great. Just in time for winter and an occasional off road venture.

Original tires were OEM Pirelli Scorpion Zero 275/45/21

New tires are Bridgestone Dueler 265/65/18

Do I need to adjust calibration for MPH or is it close enough? I've read here about the 3% variance but I can't figure out the math.

 

[themishmosh]

You lucked out! I would love to run those for winter. They look great!
I use 255/65/18 which are 1.3% larger. 265/65/18 is 2.9% larger circumference than stock 21" tires.

 

[2020FordRaptor]

Baby Got New Shoes For Christmas!

Found an almost unused set of Timberline wheels and tires for my 2022 ST. They fit perfectly and IMHO look great. Just in time for winter and an occasional off road venture.

Original tires were OEM Pirelli Scorpion Zero 275/45/21

New tires are Bridgestone Dueler 265/65/18

Do I need to adjust calibration for MPH or is it close enough? I've read here about the 3% variance but I can't figure out the math.

View attachment 459809

View attachment 459810

It’s easy to do on Forscan, but not really needed. Not that big of a difference.

 

[Eltee]

You lucked out! I would love to run those for winter. They look great!
I use 255/65/18 which are 1.3% larger. 265/65/18 is 2.9% larger circumference than stock 21" tires.

Thanks for doing the math ... it was over my head.

 

[peterk9]

Thanks for doing the math ... it was over my head.

Here is the site I use with your tire sizes added. Merry Christmas.

275/45 R21 vs 265/65 R18 Tire Size Comparison Table with Graphic Visualization (inch difference)

The difference in sizes and parameters between the 275/45 R21 tire and 265/65 R18 tire. Detailed calculations and graphics. Calculate the difference in inches.

tire-calc.com

Peter

 

[Eltee]

Here is the site I use with your tire sizes added. Merry Christmas.

275/45 R21 vs 265/65 R18 Tire Size Comparison Table with Graphic Visualization (inch difference)

The difference in sizes and parameters between the 275/45 R21 tire and 265/65 R18 tire. Detailed calculations and graphics. Calculate the difference in inches.

tire-calc.com

Peter

Thank you for this awesome resource. Merry Christmas to you and yours!