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      04-19-2021, 02:25 AM   #1
Irontitz
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Do I have proper tire size?

I recently purchased a pre-owned set of HREs for my xdrive F32 that was previously on a E90 335.

The fronts are 19x8.5 running 235/35/19
The rears are 19x10 running 265/30/19

The ride height seems a bit high. Like there is too much wheel well gap. So much that I can fit my whole fist in there lol. Is this normal?

Would it be better to look at getting new tires with more sidewall or would coilovers be a better option?
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      04-19-2021, 06:26 AM   #2
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The standard 19" tire sizes are 225/40 + 255/35. Yours are smaller in diameter by 0.5 - 0.7", thus your ride height is lower than standard and the wheel gaps are bigger.

As you need to keep the front/rear diameter close for x-drive, your options can be 235/40+265/35, 245/40+275/35, or keep these and lower the car. The first two are more comfy choices, the latter means further compromise the ride quality caused by the low profile tires. If you would like to upsize the tires, check first offsets (ET) of the wheels to be sure the new tires will not rub.

Last edited by J555; 04-19-2021 at 08:49 AM..
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      04-19-2021, 08:04 AM   #3
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Quote:
Originally Posted by J555 View Post
The standard 19" tire sizes are 225/40 + 255/35. Yours are smaller in diameter by 0.5 - 0.7", this your ride height is lower than standard and the wheel gaps are bigger.

As you need to keep the front/rear diameter close for x-drive, your options can be 235/40+265/35, 245/40+275/35, or keep these and lower the car. The first two are more comfy choices, the latter means further compromise the ride quality caused by the low profile tires. If you would like to upsize the tires, check first offsets (ET) of the wheels to be sure the new tires will not rub.
Dont forget undersized tires also throw off speedo and odo.
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      04-19-2021, 09:27 AM   #4
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you should run 235/40/19 & 265/35/19. it will fill the wheel well some without needing to lower, correct the speedo and provide a better ride.
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      04-22-2021, 11:09 PM   #5
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Quote:
Originally Posted by J555 View Post
The standard 19" tire sizes are 225/40 + 255/35. Yours are smaller in diameter by 0.5 - 0.7", thus your ride height is lower than standard and the wheel gaps are bigger.

As you need to keep the front/rear diameter close for x-drive, your options can be 235/40+265/35, 245/40+275/35, or keep these and lower the car. The first two are more comfy choices, the latter means further compromise the ride quality caused by the low profile tires. If you would like to upsize the tires, check first offsets (ET) of the wheels to be sure the new tires will not rub.
I like the idea of wider tires. It does look a tad stretched right now but it also looks like it will fit perfectly if lowered.

The front rims are 19x8.5 et 30
The rear rims are 19x10 et 40

With this offset would it be ok to run 245/40+275/35 without rubbing?
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      04-22-2021, 11:13 PM   #6
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Quote:
Originally Posted by wdeerfield View Post
you should run 235/40/19 & 265/35/19. it will fill the wheel well some without needing to lower, correct the speedo and provide a better ride.
Would more sidewall decrease handling and increase comfort? I feel these current tires handle amazing it's just the appearance looks like something is not right.
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      04-23-2021, 04:58 AM   #7
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Quote:
Originally Posted by Irontitz View Post
Would more sidewall decrease handling and increase comfort? I feel these current tires handle amazing it's just the appearance looks like something is not right.
If you use exactly the same tires, and inflate them to the same pressure, then yes. It will also (depending on the actual tire size) change the gearing a bit, and reduce the unwanted speedo error (now you have approx. double the standard deviation from the stock sizes).

Dropping the car is another option, if you are fine with the lower ground clearance and further compromised comfort. Beware the lowering of x-drive chassis ain't that straightforward as with rwd cars (you can find related topics in chassis section).

Last edited by J555; 04-23-2021 at 05:05 AM..
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      04-23-2021, 07:20 AM   #8
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Quote:
Originally Posted by Irontitz View Post
Would more sidewall decrease handling and increase comfort? I feel these current tires handle amazing it's just the appearance looks like something is not right.
the stock tire diameter of the f30 is 26" and your current tires are 25.48". Going to what i suggest not only fills the wheel well better, provides better comfort and sidewall protection but is only .3" taller than stock so you wont even notice decrease in handing. i ran this on my f30 and wasnt lowered with xdrive and it looked proper and handled great.

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      04-26-2021, 04:02 AM   #9
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Quote:
Originally Posted by wdeerfield View Post
the stock tire diameter of the f30 is 26" and your current tires are 25.48". Going to what i suggest not only fills the wheel well better, provides better comfort and sidewall protection but is only .3" taller than stock so you wont even notice decrease in handing. i ran this on my f30 and wasnt lowered with xdrive and it looked proper and handled great.

Thanks for answering my questions. What size tires and rims are you running in the pic?

My current rims are: front rims 19x8.5 et 30, the rear rims are 19x10 et 40

Do you know with this offset would it be ok to run 245/40+275/35 without rubbing?

I was looking into tires with bigger side wall. but it looks like the tires I want don't come in 235/40 but is available in 245/40.
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