M5 brake conversion & Tires
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My Ride: 2008 e61 xi m-package
Model Year: 2008
M5 brake conversion & Tires
So I successfully converted the cars brakes, in so doing I got some or bearings and changed the rear tires to 285/35/18 up front 245/40/18, I am having serious traction control issue, at 60 mph it comes on , I have to lift off to reset it, any ideas?
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My Ride: 535xi touring
Model Year: 2008
245/40R18 = 25.7x9.7R18
285/35R18 = 25.9x11.2R18
275/35R18 = 25.6x10.8R18
Your tires may be rotating at different speeds, which at high speeds could be enough to trigger the traction control.
Last edited by Mrmandmman; 05-19-2016 at 07:22 PM.
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My Ride: 2008 e61 xi m-package
Model Year: 2008
Checked seemed fine
We checked with a live scan and rotating speed was nearly identical, within 1kmh. But perhaps you are right
This is the difference 245/275
Diameter 653.2mm 649.7mm
Circumference 2052.1mm 2041.1mm
Poke 65mm 92.7mm
Inset 151mm 148.7mm
Speedo error 0% 0.54%
Reading at 30mph 30mph 30.16mph
Reading at 60mph 60mph 60.32mp
This is 245/285
Diameter 653.2mm 656.7mm
Circumference 2052.1mm 2063.1mm
Poke 65mm 92.7mm
Inset 151mm 148.7mm
Speedo error 0% -0.53%
Reading at 30mph 30mph 29.84mph
Reading at 60mph 60mph 59.68mph
This is the difference 245/275
Diameter 653.2mm 649.7mm
Circumference 2052.1mm 2041.1mm
Poke 65mm 92.7mm
Inset 151mm 148.7mm
Speedo error 0% 0.54%
Reading at 30mph 30mph 30.16mph
Reading at 60mph 60mph 60.32mp
This is 245/285
Diameter 653.2mm 656.7mm
Circumference 2052.1mm 2063.1mm
Poke 65mm 92.7mm
Inset 151mm 148.7mm
Speedo error 0% -0.53%
Reading at 30mph 30mph 29.84mph
Reading at 60mph 60mph 59.68mph
#5
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My Ride: 2008 BMW 535XiT Sport Wagon
It's the difference in tire size. It sucks given that you have the tires now and it's expensive to swap out again. If you're gonna go staggered, best is 245/45/18 & 275/40/18 as they are exactly the same. I'm not sure if I'd want to put the strain on the x-drive, but to each their own.
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