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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Optimum Tire Size for 18.5” Wheels



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      03-25-2020, 08:37 PM   #1
SAVAGE_VT_E92
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Optimum Tire Size for 18.5” Wheels

I have 18x8.5 VMR V710s on my e92 328xi with 225/40/18 tires (square setup). Would I gain any benefit from using wider tires on the rear such as 255/35/18 or wider all around? Seems like 225 is a bit narrow for these wheels.

I bought the car recently and it has almost new Michelin PSS tires so won’t be replacing for a while but would like to know for future reference.
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      03-26-2020, 08:55 AM   #2
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255/35/18 square is pretty popular. Overall, you'll just have more grip.
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      03-27-2020, 08:16 AM   #3
SAVAGE_VT_E92
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Thanks - that's what I figured, but wasn't sure if there is an advantage to having narrower tires in the front despite having the wheel width to accommodate a wider tire. Sounds like that's a no.
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      03-27-2020, 09:08 AM   #4
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Quote:
Originally Posted by SAVAGE_VT_E92 View Post
Thanks - that's what I figured, but wasn't sure if there is an advantage to having narrower tires in the front despite having the wheel width to accommodate a wider tire. Sounds like that's a no.
Opposite actually, the cars understeer a lot from factory like every car, and running wider rears just exacerbate that.
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      03-27-2020, 10:09 AM   #5
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You can have more grip with sticky rubber like Bridgestone Potenza S-04 Pole Position. I have them in 235 and plenty of rubber.
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      03-29-2020, 10:55 AM   #6
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Thanks for the tips everyone. I’ll go for some wider rubber down the road when it’s time to replace the PSSs.
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