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      08-21-2019, 02:32 PM   #67
onefastdoc
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You could just add a 5mm spacer up front to fit the 265 tire on the stock wheel, or get a different set of wheels with a different offset.
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      08-21-2019, 03:22 PM   #68
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Originally Posted by onefastdoc View Post
You could just add a 5mm spacer up front to fit the 265 tire on the stock wheel, or get a different set of wheels with a different offset.
Yes, unless that takes you too far the opposite direction into the fender well lip. What's the clearance on that side?
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      08-21-2019, 09:27 PM   #69
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Originally Posted by MrItaly View Post
Yes, unless that takes you too far the opposite direction into the fender well lip. What's the clearance on that side?
The section width of the 255 is 10.2" The section width of the 265 is 10.7 inches. So you would need 0.25" of spacer or roughly 7mm of spacer to be safe. You have roughly 12mm of max space on the outside of the tire to outside of the fender before the top of the tire is exposed on the stock 255. You would lose 7mm of that by installing the 265 tire. So you have roughly 5mm of "spacer space" left with the stock wheel and a 265 mounted on it. You would be taking a slight chance that a pothole hit would bulge the 265 slightly int the shock with a 5mm spacer behind the wheel. 255 is optimum if you want a spacer for a more flush look. 265 needs to be pushed out to the esthetic limit to fit.
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      08-21-2019, 10:11 PM   #70
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Originally Posted by onfireX5 View Post
The section width of the 255 is 10.2" The section width of the 265 is 10.7 inches. So you would need 0.25" of spacer or roughly 7mm of spacer to be safe. You have roughly 12mm of max space on the outside of the tire to outside of the fender before the top of the tire is exposed on the stock 255. You would lose 7mm of that by installing the 265 tire. So you have roughly 5mm of "spacer space" left with the stock wheel and a 265 mounted on it. You would be taking a slight chance that a pothole hit would bulge the 265 slightly int the shock with a 5mm spacer behind the wheel. 255 is optimum if you want a spacer for a more flush look. 265 needs to be pushed out to the esthetic limit to fit.
👍🏻 That was a much better and more scientific answer than mine was. I’m kind of surprised that there is only that much room, considering it’s an SUV. I can fit 275 width tires on the front of my M3, so I just assumed there would be a lot more room on the X3M.
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      08-21-2019, 10:47 PM   #71
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Quote:
Originally Posted by onefastdoc View Post
👍🏻 That was a much better and more scientific answer than mine was. I’m kind of surprised that there is only that much room, considering it’s an SUV. I can fit 275 width tires on the front of my M3, so I just assumed there would be a lot more room on the X3M.
That makes two of us that was surprised. My 265’s arrived today. Lol. Sent them back. Looking from the outside, I saw plenty of room. Glad I’m paranoid and put it on my lift to measure. The shock location up front is crazy tight. A mile in the back.
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      08-21-2019, 11:02 PM   #72
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So pretty! I live this car! Saw it in the showrooms! I have some questions about the M40i, I’m on a budget (I live in LA ans shi*% is expensive) and able to lease a new 19, loaded (without nav, heated seats, or lane assist for $650 a month with tax with $3k down. Either white with tan or silver with black.
Also an option at the dealer is an executive demo fully loaded x4 for $540 a month with tax and $2500 down. I’m a real estate agent saving for a house so every dollar counts. I don’t have clients in the car much so the slopes down roof doesn’t bother me.
I was in a 2019 X2 m that after 6k miles gave me a lot of issues including broken AC, leaky sunroof and stalling, they’re buying the car back. Good experience with the buyback btw. I can’t discuss specifics.
Before the x2 I was in a 335 GT which was a great car for me. Call me crazy but I don’t t mind the hatchback lol.
I can use the guidance.

Thoughts?
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      08-22-2019, 12:24 AM   #73
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Originally Posted by LATamara View Post
So pretty! I live this car! Saw it in the showrooms! I have some questions about the M40i, I’m on a budget (I live in LA ans shi*% is expensive) and able to lease a new 19, loaded (without nav, heated seats, or lane assist for $650 a month with tax with $3k down. Either white with tan or silver with black.
Also an option at the dealer is an executive demo fully loaded x4 for $540 a month with tax and $2500 down. I’m a real estate agent saving for a house so every dollar counts. I don’t have clients in the car much so the slopes down roof doesn’t bother me.
I was in a 2019 X2 m that after 6k miles gave me a lot of issues including broken AC, leaky sunroof and stalling, they’re buying the car back. Good experience with the buyback btw. I can’t discuss specifics.
Before the x2 I was in a 335 GT which was a great car for me. Call me crazy but I don’t t mind the hatchback lol.
I can use the guidance.

Thoughts?
Those deals don't seem too great. I'd reach out to some of the forum sponsors and see what they can offer. If you don't mind shopping out of state for a better deal.
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      08-23-2019, 04:50 AM   #74
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Could you comment on turbo lag of the x3m s58 vs other 3 litre turbos eg s55, 991.2 c2s or other similar capacity turbo engines you have driven? I'm not talking about tip in torque of 3 litre vs 4.4 litre. Specifically curious about the turbo lag
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      08-23-2019, 08:50 AM   #75
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Quote:
Originally Posted by onefastdoc View Post
���� That was a much better and more scientific answer than mine was. I’m kind of surprised that there is only that much room, considering it’s an SUV. I can fit 275 width tires on the front of my M3, so I just assumed there would be a lot more room on the X3M.
Also be careful if you are considering tires from different manufacturers. A 265 from one could be significantly narrower or wider than a 265 from another. Even subsequent models from same manufacturer can be different. (For example, the Hoosier R7 245 was significantly wider than the Hoosier R6 245 which it replaced, causing huge smoking tire rubs on race cars that had been using the R6s.) Then there is also how much lateral suspension travel there is under cornering loads.
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      08-23-2019, 10:00 AM   #76
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Originally Posted by MRichmond View Post
Also be careful if you are considering tires from different manufacturers. A 265 from one could be significantly narrower or wider than a 265 from another. Even subsequent models from same manufacturer can be different. (For example, the Hoosier R7 245 was significantly wider than the Hoosier R6 245 which it replaced, causing huge smoking tire rubs on race cars that had been using the R6s.) Then there is also how much lateral suspension travel there is under cornering loads.
Great point. All section widths of different manufactures are not the same. Plus the measuring rim width is critical. I’ve decided to keep my Factory Michelin’s for the summer since they are killer good and get my wrenches out fall/spring and use the BMW dedicated winters.
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      08-23-2019, 10:14 AM   #77
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Originally Posted by 1azycat View Post
Could you comment on turbo lag of the x3m s58 vs other 3 litre turbos eg s55, 991.2 c2s or other similar capacity turbo engines you have driven? I'm not talking about tip in torque of 3 litre vs 4.4 litre. Specifically curious about the turbo lag
Excellent question. Extremely different to answer accurately without extensive data logs to map the boost profile. I can give you a “rough” observation, but take it with a grain of salt as What I “feel” vs someone else could be totally different.

2015 X5 3.0 single turbo with MPPK and DINAN. Part throttle was decent. Reasonably linear power flow BUT definitely limited on power/torque everywhere.

2020 X3M 3.0 twin turbo pure stock. More part throttle torque than X5. Power flow is linear down low but ramps up FAST/HARD in the upper mid range to the top. HUGE upgrade over the 3.0 X5.

2019 Porsche 991.2 Turbo S twin turbo. Totally different turbo technology with a variable turbine. I can Launch with 9psi of Boost. Barely tip in the throttle and hit 3psi. In a league of its own.
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      08-23-2019, 10:26 AM   #78
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Quote:
Originally Posted by onfireX5 View Post
Excellent question. Extremely different to answer accurately without extensive data logs to map the boost profile. I can give you a “rough” observation, but take it with a grain of salt as What I “feel” vs someone else could be totally different.

2015 X5 3.0 single turbo with MPPK and DINAN. Part throttle was decent. Reasonably linear power flow BUT definitely limited on power/torque everywhere.

2020 X3M 3.0 twin turbo pure stock. More part throttle torque than X5. Power flow is linear down low but ramps up FAST/HARD in the upper mid range to the top. HUGE upgrade over the 3.0 X5.

2019 Porsche 991.2 Turbo S twin turbo. Totally different turbo technology with a variable turbine. I can Launch with 9psi of Boost. Barely tip in the throttle and hit 3psi. In a league of its own.
Thanks for the reply! Happy to see that the s58 has more part throttle torque than the n55. I'm guessing the huge power up top may make it feel "laggier"?
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      08-23-2019, 10:47 AM   #79
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Originally Posted by 1azycat View Post
Thanks for the reply! Happy to see that the s58 has more part throttle torque than the n55. I'm guessing the huge power up top may make it feel "laggier"?
To get really abstract with you .....

More like the 1978 400 ci TA I had. Linear power down low from 6.6 Liters, then I would hit the manual Nitrous Button at mid rpm and it would “slam you back “.

Extremely Rough, but close, analogy.
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      08-23-2019, 11:16 AM   #80
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Sounds like my SQ5 in that there is turbo lag but it's also tuned for a torque wave at about 3k rpms. Our new M340i is different and nearly immediate across the rev range but you do notice a nice steady torque wave building as revs climb. It's very fast for what it is. If X3M is like this but with more power, I would imagine 4k+ rpms is ridiculous.

In the X3M If you are cruising on the highway at say 3k rpms and stab the throttle is there a brief lag then surge in torque or immediate power? Sorry, I have no way to test drive so nice to hear some perspective.
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      08-23-2019, 07:45 PM   #81
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Originally Posted by onfireX5 View Post
You have just described the difference between a hard hitting V8TT and a well designed 6cylTT. My TTS is a flat 6 TT and has zero lag also.
Well, based on acceleration numbers, I assume you have TTS RS. Either way, you do not have a flat 6 unless you did a very expensive transplant from a Porsche!
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      08-23-2019, 08:02 PM   #82
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Quote:
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Well, based on acceleration numbers, I assume you have TTS RS. Either way, you do not have a flat 6 unless you did a very expensive transplant from a Porsche!
Oops, never mind! What can you expect from a bimmer head, anyway!
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