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      02-13-2013, 04:00 AM   #1
Billyray911
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Quick tyre question

I have a square 8j MV3 set up on my E91 with 225x40x18's
Could I fit 245x40x18's without any issues?
Also,keeping three of the 225x40x18's,would there be any issues fitting one 225x60x18?
Cheers for any answers...
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      02-13-2013, 04:08 AM   #2
verysideways
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Quote:
Originally Posted by Billyray911 View Post
I have a square 8j MV3 set up on my E91 with 225x40x18's
Could I fit 245x40x18's without any issues?
Also,keeping three of the 225x40x18's,would there be any issues fitting one 225x60x18?
Cheers for any answers...
An 8J wheel can fit 215 or 245 tyres, though 225 and 235 are the recommended sizes.
Also a 245/40 is a good bit bigger than a 255/35 or a 225/40 and will change your speedo accuracy. I'd suggest if you want a staggered set up with your 8" rims all round that you go for 225/40 front and 235/40 rear.

And no, i'd never fit any car with three tyres of 1 size and one tyre of a different size (unless that last tyre was a space saver and it was an emergency).
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      02-13-2013, 06:27 AM   #3
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Thanks for the clarification and If I'm honest I'm being lazy as its because I need a replacement winter tyre and was looking at options...
So in effect,there would be no issues with fitting a 245 all round on an 8j,other than inaccuracies in the speed?
And a difference in the height of one tyre is a no-no.How about fitting two matching rear tyres,where the heights both differ from the fronts ie 40 fronts and 60 rears?
Sorry for the bone question but I'm just trying to work a few things out...!
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      02-13-2013, 08:03 AM   #4
verysideways
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Quote:
Originally Posted by Billyray911 View Post
Thanks for the clarification and If I'm honest I'm being lazy as its because I need a replacement winter tyre and was looking at options...
So in effect,there would be no issues with fitting a 245 all round on an 8j,other than inaccuracies in the speed?
And a difference in the height of one tyre is a no-no.How about fitting two matching rear tyres,where the heights both differ from the fronts ie 40 fronts and 60 rears?
Sorry for the bone question but I'm just trying to work a few things out...!
Your insurance company may have issues with you fitting a 245 to an 8" wheel as BMW don't recommend it (or advocate it). Ditto the 225/60 idea, a 60 profile 225 is a lot bigger than a 40 profile 225.

Can you not just pick up a pair of part worn 225/40 winters on ebay (search European Union rather than just UK)?
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