01-11-2016, 01:05 PM | #1 |
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Bigger Tires?
I am wondering if I could run 275/45/21 on the front and 315/40/21 on the rear of my M (215 style wheels). Stock runs 285/35/21 and 325/30/21. I'm looking for a thicker sidewall. Any experts out there please let me know what you think the potential issues would be. Thanks
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01-11-2016, 04:17 PM | #3 |
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What makes it not possible?
The aspect ratios are off by the same 2.25mm front and rear as the stock. Overall diameter with wheels and tires for front stock is 28.85" and with the set-up I mentioned the front diameter would be 30.74" (less than 2 inch addition) with nearly identical less than 2" change in the rear. I thought this would be similar to lowering 2 inches. There is definitely enough room in the wells, I'm just worried about the steering mechanism up front or anything else I am not calculating for. Thank you for the assistance.
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01-12-2016, 02:09 PM | #5 | |
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See this thread. A guy installed oversize offroad tires. |
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01-12-2016, 04:36 PM | #6 | |
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The tires I am looking at are regular all-season tires, not aggressive knobby off-road ones. (also, I have 12.5mm spacers up front, 20mm in rear). Thanks for the help.
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01-12-2016, 08:51 PM | #7 | |
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The difference though are items that move in direct relation to the wheel hub like ball joints. When lowering a car, there is no change in the distance from that joint to the tire. The entire assembly move further along its upward travel. When installing larger tires, the distance from those components attached to the hub is now reduced. This will cause the tires to rub on certain components. This is regardless of any amount of lifting or raising of the suspension. Think along the lines of trying to run a wheel too small to clear a caliper |
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01-12-2016, 08:52 PM | #8 |
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Lowering has nothing to do with it.
You did say the overall diameter will increase from 28.85 to 30.74. That may cause the tire to rub the upper ball joint, because the tire sort of goes under the ball joint. This has nothing to do with lowering. Take a look at the diagram (#2, #3): http://www.realoem.com/bmw/enUS/show...diagId=31_0786 |
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01-12-2016, 09:25 PM | #9 | |
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Or do I just lower it 1.2 with H&R? Thanks again.
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01-12-2016, 09:26 PM | #10 | |
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01-13-2016, 07:35 AM | #11 |
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spacers would extend the wheels out for sure. It's possible with enough distance from the upper CA, however then you risk rubbing the pinch weld area (corners of the wheel well)
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01-13-2016, 09:25 AM | #12 |
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I had those Nitto Terra Grapplers on my Range Rover and I loved them. Would definitely buy them again. Unfortunately they come in 265/50/20 so if anyone successfully installs them on an X5M with no rubbing I'll order some straight away!
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