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Tire size

Help, Advice, Owners' Discussion and DIY Tutorials on the Volvo S80 model. Sometimes called an "executive car", the S80 was and continues to be Volvo's top-of-the-line passenger car.
MPOOL
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Tire size

Post by MPOOL » Sun May 05, 2019 2:41 pm

I recently purchased a 2006 S80 with 17" tires. Prior to that I have been driving a 2004 S80 with 16" tires. Both are front wheel drive 2.5T s. I like the feel of the 16" wheels better than the 17" ones. Also I had just bought tires for the 2004 before it became too expensive to fix. I would like to put the 16" tires on the 2006 which now needs tires. I get mixed messages from tire sites about doing this. Has anyone had any experience with this ? I understand the question of fit re rotors and brakes comes in but maybe that is hopefully a non issue. Thanking you in advance for your thoughts.



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Re: Tire size

Post by precopster » Sun May 05, 2019 4:06 pm

If the front brakes on the 2006 are larger than the 2004 there may be a problem.

As you haven't given the actual sizes I can't comment on the difference and possible impact to the speedometer calibration.


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MPOOL
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Re: Tire size

Post by MPOOL » Mon May 06, 2019 3:20 pm

The front brake rotors are the same size on both years. Same bolt pattern also.

Tire sizes 2004 215/55R 16
2006 225/50R 17

Thank you for your knowledge about this.



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Re: Tire size

Post by quietlymknnoise67 » Mon May 06, 2019 3:44 pm

Alt tire size 235/45r17



precopster
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Re: Tire size

Post by precopster » Mon May 06, 2019 6:17 pm

Tire diameter of a 215/55/16 is 643mm and is correct size for a 2004 S80

Tire diameter of a 225/50/17 is 647mm and is approximately 0.62% larger

Both sizes are in the 2006 owner's manual so should be OK for the 2004 if brake size is not an issue
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S80 2006.JPG


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Re: Tire size

Post by RickHaleParker » Tue May 07, 2019 12:54 am

Tire circumference is -2.3% shorter. The speedometer would be off -2.3%.
Unless the ECM was re-calibrated to the new tire size.

At a indicated speed of 70 MPH. The car would be moving 70 mph * .977 = 68.39 mph.

Looking through the dimension. If you have a rubbing problems, it is most likely the offset of the rims.
Capture.PNG
Capture.PNG (32.75 KiB) Viewed 252 times


Platform: P80 1998 C70, B5234T3, AW50-42, Bosch Motronic 4.4, Special Edition package, Plant: Uddevalla Sweden.

Platform: X40 (Nedcar) 2003 S40, B4204T3, AW55-50/51SN, Siemens EMS 2000. Plant: Born Netherlands.

Platform P2 2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0, Plant Torslanda Sweden.
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1997 S90, B6304S, AW30-42, Bosch Motronic 4.4 - Sold

MPOOL
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Re: Tire size

Post by MPOOL » Tue May 07, 2019 5:49 am

Thanks for the workup. I am going to go with the 16 s . I'll let you know. Thanks again.



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