M5 brake conversion & Tires
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My Ride: 2008 e61 xi m-package
Model Year: 2008
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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
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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.
#4
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My Ride: 2008 e61 xi m-package
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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
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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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