Quote:
Originally Posted by texasrr
New to this board, but did quite a bit of research and still not clear on the best possible options for an aggressive offset. I have an '15 xdrive50i M and my goal is to have a wheel/tire combo with enough sidewall and sits flush with the fenders. Also want to make sure the tires do not jam the wheel well under compression.
Below are a few options of tire sizes, but I don't know what offset I need to be flush with the fenders. I also will be using aftermarket wheels.
1. 285/35R22 - 29.88" tall
2. 275/45R20 - 29.8" tall
3. 275/45R22 - 31. 8" tall (might not fit and rubbing depends on wheel width and offset)
On an xDrive, the overall tire and wheel height needs to be the same all around or the front and back are within a 1 to 2% delta to not have issues. The f15 stock tire heights are 19"-29.03", 20"-28.66", and 21"-28.854". If all 4 are over 29" or even 30" there doesn't seem to be a problem, as long as they're all equal.
After researching the forum and from the math, I could still run these tire sizes in a staggered set up. That would mean the rear wheels would have to be a certain width and offset. I just don't know what that is.
A popular set up I've read is:
Front: 295/30R22 on 22x10.5 ET25. total poke:108.4mm
Rear: 335/25R22 on 22x12 ET35. total poke: 117.4 mm
If that's the case, the wheel offset and width for a 285/35R22 tire would need to be either:
For the front
22x10 ET 20. total poke: 107mm
22x10.5 ET 25. total poke: 108.4mm
For the back
22x10 ET 10. total poke: 117mm
22x10.5 ET 15. total poke: 118.4 mm
22x11 ET 25. total poke: 114.7mm
22x11.5 ET 30. total poke: 116.1mm
22x12 ET 35. total poke: 117.4mm
Problem is, the further the wheel and tire are from the wheel well, the higher likelyhood of it rubbing the inner wheel well. One member has 285/35R22 and with a 40mm offset experiences slight rubbing at full lock.
If anyone has pictures of larger tires it would be interesting to hear your feedback on rubbing or clearing the outer wheel well when articulating. I know this is a long winded post, but wanted to have all the facts out there for reference. I appreciate any help on this.
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Quote:
Originally Posted by texasrr
New to this board, but did quite a bit of research and still not clear on the best possible options for an aggressive offset. I have an '15 xdrive50i M and my goal is to have a wheel/tire combo with enough sidewall and sits flush with the fenders. Also want to make sure the tires do not jam the wheel well under compression.
Below are a few options of tire sizes, but I don't know what offset I need to be flush with the fenders. I also will be using aftermarket wheels.
1. 285/35R22 - 29.88" tall
2. 275/45R20 - 29.8" tall
3. 275/45R22 - 31. 8" tall (might not fit and rubbing depends on wheel width and offset)
On an xDrive, the overall tire and wheel height needs to be the same all around or the front and back are within a 1 to 2% delta to not have issues. The f15 stock tire heights are 19"-29.03", 20"-28.66", and 21"-28.854". If all 4 are over 29" or even 30" there doesn't seem to be a problem, as long as they're all equal.
After researching the forum and from the math, I could still run these tire sizes in a staggered set up. That would mean the rear wheels would have to be a certain width and offset. I just don't know what that is.
A popular set up I've read is:
Front: 295/30R22 on 22x10.5 ET25. total poke:108.4mm
Rear: 335/25R22 on 22x12 ET35. total poke: 117.4 mm
If that's the case, the wheel offset and width for a 285/35R22 tire would need to be either:
For the front
22x10 ET 20. total poke: 107mm
22x10.5 ET 25. total poke: 108.4mm
For the back
22x10 ET 10. total poke: 117mm
22x10.5 ET 15. total poke: 118.4 mm
22x11 ET 25. total poke: 114.7mm
22x11.5 ET 30. total poke: 116.1mm
22x12 ET 35. total poke: 117.4mm
Problem is, the further the wheel and tire are from the wheel well, the higher likelyhood of it rubbing the inner wheel well. One member has 285/35R22 and with a 40mm offset experiences slight rubbing at full lock.
If anyone has pictures of larger tires it would be interesting to hear your feedback on rubbing or clearing the outer wheel well when articulating. I know this is a long winded post, but wanted to have all the facts out there for reference. I appreciate any help on this.
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I'm running with Xdrive.
Vorsteiner
Front 22x10 +35 w/ 5mm spacers and 295/30/22
Rear: 22x11 +30 w/ 12mm spacers and 335/25/22
Lowered on H&R Spring
Ratio diameter difference between front and rear is 1.4%. Been running this for a few month. No drive train issues or code thrown. Wheels are flush to the fender with the spaces. Without spacers, it will tuck inside the fenders. Tires are flush with the rim. Doesn't stretch.