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      10-03-2015, 03:53 PM   #1
ba ba boosh
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Wheel Fitment Question

My cousin gave me his stock 17x8 wheels from his 528i xdrive 225/55R17. I know my stock tires are 245/55R17. The 528i tires are brand new continental runflats. Will these fit on my F25? I apologize I know nothing of wheel fitment specifics. Thanks in advance.
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      10-04-2015, 08:34 AM   #2
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You will be running shorter 5 series tires when the X3 needs taller ones (same as 5GT and 7 series) .

The result will be overstating your speed and odometer vs actual, because the car has to spin the wheels faster than calibrated
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      10-04-2015, 03:33 PM   #3
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Quote:
Originally Posted by pokerface View Post
You will be running shorter 5 series tires when the X3 needs taller ones (same as 5GT and 7 series) .

The result will be overstating your speed and odometer vs actual, because the car has to spin the wheels faster than calibrated
But will fit and no rubbing will be going on in the wheel wells?
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      10-04-2015, 09:07 PM   #4
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The tyres (tires) will fit and being smaller diameter and not as wide will have no problems with rubbing. But as pokerface mentioned you will be running undersized tyres. There will be 22mm - or nearly 1 inch - difference in the rolling diameter of two sizes. This is a variance of -3.2% will result in your speedo (and odometer) reading 3.2% high - ie @ an indicated 60mph you are actually only doing 58mph.

This degree of undersize should be OK but we have had reports over the years of people running 5%-10% undersize tyres resulting in error messages from the X3's xDrive system

Tony
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      10-04-2015, 09:28 PM   #5
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Quote:
Originally Posted by brissim View Post
The tyres (tires) will fit and being smaller diameter and not as wide will have no problems with rubbing. But as pokerface mentioned you will be running undersized tyres. There will be 22mm - or nearly 1 inch - difference in the rolling diameter of two sizes. This is a variance of -3.2% will result in your speedo (and odometer) reading 3.2% high - ie @ an indicated 60mph you are actually only doing 58mph.

This degree of undersize should be OK but we have had reports over the years of people running 5%-10% undersize tyres resulting in error messages from the X3's xDrive system

Tony
Yeah I think I'll just bite the bullet and order brand new set of Pirelli 245/55/17s. This seems too much of a complicated situation. Thank you for all the advice both of you.

Last edited by ba ba boosh; 10-04-2015 at 09:59 PM.
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      10-05-2015, 03:27 AM   #6
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      10-05-2015, 04:02 AM   #7
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      10-05-2015, 06:01 AM   #8
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Ok

I made a mistake there happy to accept that

I have deleted my original post to remove the confusion it may have caused

Perhaps you should remove the reference to it
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      10-05-2015, 06:18 AM   #9
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No problems Andy - posts removed.

Tony
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      10-09-2015, 10:37 AM   #10
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Quote:
Originally Posted by ba ba boosh View Post
My cousin gave me his stock 17x8 wheels from his 528i xdrive 225/55R17. I know my stock tires are 245/55R17. The 528i tires are brand new continental runflats. Will these fit on my F25? I apologize I know nothing of wheel fitment specifics. Thanks in advance.
The problem here would be safety more than fitment. The 245 width tires have a "Load Index" of 102 corresponding to 1874 lbs. each. For the 225 width tires the LI is 97 which translates to 1609 lbs. Never use a tire with a lower load carrying capacity than what is shown on the tire placard for a specific vehicle.
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