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      04-30-2017, 03:13 AM   #1
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Widest tires possible?

How wide can you fit tires in your X5 F15 without fender flares? and with fender flares? what ET? the Rim size? thanks for sharing (pic if possible)
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      05-01-2017, 02:37 PM   #2
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You're going to need to tell people what style OEM wheels you're using, if you're even using OEM wheels, and whether you're also including spacers or not, and the size of spacers. Also, are you planning on lowering the car? So there's a lot of variables at play here that you need to put out there before people can give you specific answers.

Generally, if all you're changing is tire size and leaving suspension and spacer out, then wheel width is mostly going to dictate your max size and will be the bottleneck and then everything else beyond that would be your personal experience whether it rubs against your wheel well liner. (There's trial and error, just b/c it fits doesn't mean it won't rub, so you have to buy, install and then test and can get costly) I have not read many people go beyond OEM sizes especially on OEM 20s as its much harder to find tires beyond 315 and match the diameter with the upsized fronts. It's already hard enough finding 315 spec tires to begin with.

Also, the flares won't matter and play into the technical aspects of fitment. Flares are there mostly for cosmetic and probably guard against some rock or road debris from kicking up and damaging your body work, but I imagine that's a minimal issue as they only stick out 1 inch on the rear fenders and for M Sports, they're color matched...so you're going to get chips on your flares which defeats the intentions of protecting paint. Basically, you have to decide if you like wheels that stick out with or without flares for aesthetics.


Lastly, one question from me....why? You're not driving a 700HP 3200 lb Viper ACR and need to put maximum contact patch on for best braking grip and cornering at 1.5g. If anything, narrower tires will help fuel economy and offroad abilities. Is it for vanity purposes? (be honest)

FYI, I own an M3 and upsized my tires (245/265 to 255/275), without tracking it, I cannot tell a difference. Maybe the turn in is a bit sharper due to lower sidewall, and maybe slight better load on hard turns, but that's about it....and after this experience, I would not pay up to upsize, you just cannot visually tell and you're paying a premium (in my case the PSS set costs close to $1500 for upsize). With 19s, M3's suspension and lower sidewall, I walk into work with my pelvis ground down to dust and a partially crushed skeleton from the poor roads that I drive on. (on my M3, to upsize, you need to lower your sidewall)

On my X5, I'm just trying not to pay over $1000 for 315s....let alone try to upsize and all that...

Lastly, if you're not even on wheels 20 or larger...then why? Upping wheel size is going to give you a better cosmetic upgrade than upping tire width.
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      05-01-2017, 07:26 PM   #3
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Probably 335s...
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      05-01-2017, 10:10 PM   #4
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Quote:
Originally Posted by P1et View Post
Probably 335s...
335 on 18s would look dumb
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      05-02-2017, 12:54 AM   #5
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Thanks @ Flying Ace for information

Quote:
Lastly, one question from me....why? You're not driving a 700HP 3200 lb Viper ACR and need to put maximum contact patch on for best braking grip and cornering at 1.5g. If anything, narrower tires will help fuel economy and offroad abilities. Is it for vanity purposes? (be honest)
yes, mostly vanity. I can't even put accelerate past 100 kmh in my hometown.

Quote:
On my X5, I'm just trying not to pay over $1000 for 315s....let alone try to upsize and all that...

Lastly, if you're not even on wheels 20 or larger...then why? Upping wheel size is going to give you a better cosmetic upgrade than upping tire width.
I'm planning to upgrade to 21", mostly OEM style wheel. I try not to stray away from the OEM feel
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      05-02-2017, 01:43 AM   #6
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If you're planning on sticking with OEM styles and sizes, why worry about the widest tire you can fit? Just stick with the 285/335 combo... like the current set of 21" 599Ms for sale right now in the classifieds.
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      05-02-2017, 02:45 AM   #7
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Quote:
Originally Posted by MotorWerkz View Post
Thanks @ Flying Ace for information



yes, mostly vanity. I can't even put accelerate past 100 kmh in my hometown.



I'm planning to upgrade to 21", mostly OEM style wheel. I try not to stray away from the OEM feel
Just stick to the size specified. Any wider wont change the looks much.
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      05-02-2017, 07:25 AM   #8
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Quote:
Originally Posted by Flying Ace View Post
335 on 18s would look dumb
335 Contis?
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      05-02-2017, 08:51 AM   #9
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Whatever you do, just make sure the rotating diameter are not far off than stock recommended size.
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      05-02-2017, 09:12 AM   #10
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Quote:
Originally Posted by r33_RGSport View Post
Whatever you do, just make sure the rotating diameter are not far off than stock recommended size.
currently I'm running stock wheel for xDrive35i. What's the max I can go for 21" wheel?
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      05-02-2017, 11:14 AM   #11
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Quote:
Originally Posted by MotorWerkz View Post
Quote:
Originally Posted by r33_RGSport View Post
Whatever you do, just make sure the rotating diameter are not far off than stock recommended size.
currently I'm running stock wheel for xDrive35i. What's the max I can go for 21" wheel?
21" I believe it was 325/30-21 for the rear.
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      05-02-2017, 11:17 AM   #12
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Quote:
Originally Posted by P1et View Post
335 Contis?
poverty spec...
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      05-02-2017, 11:36 AM   #13
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Sorry to hijack.... or maybe it's not

Is 335/25-22 or 315/25-22 recommended for rears?

And if so what spacers should be used best ?

Offset front 40
Offset rear 35

Thanks!
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      05-02-2017, 11:42 AM   #14
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Quote:
Originally Posted by BimmerSFo View Post
Sorry to hijack.... or maybe it's not

Is 335/25-22 or 315/25-22 recommended for rears?

And if so what spacers should be used best ?

Offset front 40
Offset rear 35

Thanks!
you must only drive in the newly paved sections of Dublin or something...
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      05-02-2017, 05:52 PM   #15
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Quote:
Originally Posted by Flying Ace View Post
335 on 18s would look dumb
Indeed, but it would be fun to see someone do it, on their dime.
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      05-04-2017, 08:26 AM   #16
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      05-04-2017, 08:58 AM   #17
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I'd prefer wider tires versus skinny ones. Because even the widest spacers can't help you here.
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      05-04-2017, 09:41 AM   #18
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Quote:
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I'd prefer wider tires versus skinny ones. Because even the widest spacers can't help you here.
Right/agree, but 315 or 335 is plenty wide for our cars so I don't understand the continued obsession with "widest possible". I like pokerface's reply.
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      05-04-2017, 10:02 AM   #19
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I don't think the OP wants anything exaggerated like pokerface posted.
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      05-04-2017, 10:34 AM   #20
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Well... I'm not Jeep owner.
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      05-04-2017, 01:59 PM   #21
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Quote:
Originally Posted by MotorWerkz View Post
Well... I'm not Jeep owner.
Your answer is 315s on 20s, 325s on 21s and 335s on 22s. If you go with a larger wheel than that, I suggest you leave this forum.

Good luck.
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      05-04-2017, 02:03 PM   #22
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Quote:
Originally Posted by P1et View Post
Your answer is 315s on 20s, 325s on 21s and 335s on 22s. If you go with a larger wheel than that, I suggest you leave this forum.

Good luck.
22 is already pretty absurd, IMO. But my opinion and $1 won't get you a cup of coffee at Starbucks.

the profile on a 22 inch tire...it'll look funky with the ride height...

IMO, 21 wheels are the thinnest tires I'm willing to accept membership on this forum at.
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