08-26-2019, 02:28 PM | #45 |
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That's what I was thinking when they told me I should get 4 new ones. So keeping the "old new two" (the ones that are 8/32) on the front and the new ones on the back won't mess anything you with my drivetrain at all? I didn't think it was that big of a difference either, but this one shop I'm dealing with is freaking out saying X3's are the most sensitive to different tread depths.
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08-26-2019, 02:39 PM | #46 | |
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From BMW TIS: 36 12 ...Notes and specifications for tyre / wheel exchange General: The tyre size, manufacturer and tyre tread must be the same on one axle To meet the BMW standards, the vehicle should be equipped with tyres from the same manufacturer and with the same tyre tread (tyres approved by BMW) on all 4 wheels The difference in tyre tread depth on one axle must not exceed 2 mm (control quality of suspension control systems and wheel alignment requirement) The tyres with the higher tread depths must be mounted on the rear axle So BMW is stating that the maximum allowable difference in tread depth on tires mounted on front vs. rear axle is 2mm. 2mm = 0.0787" which equals 2.5/32". Your four tires (2 will be new, two are existing ones) are within that spec as front/rear vary by 2/32", correct? Buy two tires, install the brand new tires on the rear of the car, other 2 on the front, done. (tires on these X3 cars wear pretty equally when comparing fronts to rears; rotation is almost not necessary...just keep an eye on the tread depths every 6 or so months and you'll be fine). |
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08-26-2019, 02:44 PM | #47 | ||
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08-26-2019, 02:54 PM | #48 |
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Car will be fine- just measure tread depth every 6 months or so, so that you know you are within or close to max allowable tread depth difference. |
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