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Thread: M System (17x8) Tire sizing question...

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  1. #1
    Join Date
    Dec 2004
    Posts
    488

    Default

    Quote Originally Posted by Interceptor
    He has the M5 Nurburgring sways - he got them with the car and later upgraded the tyres from 235/45R17 to 245/265 combination.

    Well, the suspension is bone stock, it's supposedly 'Nuburgring pkg' suspension, not sure if that includes the sways or not.

    What's the verdict though? Should I chance it, and pick them up?
    -Trevor Ely

    '88 535is
    '95 M Sport 540i (1 of 200)
    '91 M5

  2. #2
    Join Date
    Jan 2004
    Location
    NJ
    Posts
    240

    Default Only one way to find out

    I say get them. If there is any rubbing, it will only be against the front sway bar at full lock. I'm running 245/45/17 Falken Azenis Sports on 17x8.5 ET15 BBS RCs. They rub slightly against my Dinan front bar at full lock. The Dinan bar is the same 25mm diameter as the bar on your 540i Sport, but it has different geometry, so you may not experience any rubbing.

    As far as speedometer error, the tires may actually make your speedo read more accurately. 245/45/17 is closer to the regular E34 stock tire size of 225/60/15. 245/45/17 is a common Mustang tire size, so there are lots of good an inexpensive options out there in that size. I've tried lots of different tire sizes on my car, but for 17" wheels, I'm sticking with 245/45/17.

    Drew Z
    6-speed Touring


    Quote Originally Posted by MTechnik540i
    Well, the suspension is bone stock, it's supposedly 'Nuburgring pkg' suspension, not sure if that includes the sways or not.

    What's the verdict though? Should I chance it, and pick them up?
    Drew Z
    Formerly 540iT/6, now . . . 3, 5, 7

  3. #3
    Join Date
    Dec 2004
    Posts
    488

    Default

    Quote Originally Posted by DrewZ
    I say get them. If there is any rubbing, it will only be against the front sway bar at full lock. I'm running 245/45/17 Falken Azenis Sports on 17x8.5 ET15 BBS RCs. They rub slightly against my Dinan front bar at full lock. The Dinan bar is the same 25mm diameter as the bar on your 540i Sport, but it has different geometry, so you may not experience any rubbing.

    As far as speedometer error, the tires may actually make your speedo read more accurately. 245/45/17 is closer to the regular E34 stock tire size of 225/60/15. 245/45/17 is a common Mustang tire size, so there are lots of good an inexpensive options out there in that size. I've tried lots of different tire sizes on my car, but for 17" wheels, I'm sticking with 245/45/17.

    Drew Z
    6-speed Touring


    Well, that's some peace of mind...may go that route.
    -Trevor Ely

    '88 535is
    '95 M Sport 540i (1 of 200)
    '91 M5

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