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Technical Topics Wheels and Tires 235/40/19 or 245/35/19 for Xdrive adaptive suspension

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      Yesterday, 09:28 AM   #1
Vortexshifter09
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235/40/19 or 245/35/19 for Xdrive adaptive suspension

Want to ditch my 225/40/19 for either the 235/40/19 or 245/35/19 I have the 792m wheels not sure if they are 8 inch or 8.5 inch wide. Which would be my best bet? I’m looking at ps4s? I’ve seen that long forum about tire sizes already but not much is mentioned about 235/40/19 on a adaptive suspension Xdrive
Which would be better for handling and cutting up
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      Yesterday, 03:20 PM   #2
R12ax7
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I went from the stock RFTs to 235/40 Pilot Sport All Season all around and definitely think it is an improvement, although hard to say if that has more to do with being Non-RFT versus the different width.

Keep in mind a 235/40 will have a slightly taller sidewall than a 225/40 (but still within the 1% tolerance), so the wider tire should be a bit smoother/better at absorbing bumps also.
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      Yesterday, 03:26 PM   #3
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Quote:
Originally Posted by Vortexshifter09 View Post
Want to ditch my 225/40/19 for either the 235/40/19 or 245/35/19 I have the 792m wheels not sure if they are 8 inch or 8.5 inch wide. Which would be my best bet? I’m looking at ps4s? I’ve seen that long forum about tire sizes already but not much is mentioned about 235/40/19 on a adaptive suspension Xdrive
Which would be better for handling and cutting up
I highly recommend 235/40/19. Definitely improvement in grip, handling and comfort.
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      Yesterday, 04:38 PM   #4
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Quote:
Originally Posted by R12ax7 View Post
I went from the stock RFTs to 235/40 Pilot Sport All Season all around and definitely think it is an improvement, although hard to say if that has more to do with being Non-RFT versus the different width.

Keep in mind a 235/40 will have a slightly taller sidewall than a 225/40 (but still within the 1% tolerance), so the wider tire should be a bit smoother/better at absorbing bumps also.
Why would a 1% difference from stock matter if running square? The 1% bogey is cited for xDrive cars that run staggered setups. Am I missing something other than a trivial speedo error? For e.g., I'm moving to 245/35-19 for my current 19x9 track setup, which is ~1.3% different from stock.
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      Yesterday, 09:16 PM   #5
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Quote:
Originally Posted by prostcfc View Post
Why would a 1% difference from stock matter if running square? The 1% bogey is cited for xDrive cars that run staggered setups. Am I missing something other than a trivial speedo error? For e.g., I'm moving to 245/35-19 for my current 19x9 track setup, which is ~1.3% different from stock.
You are correct. The 1% is front vs back for the transfer case on the xdrive system.
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