All Things Mk5 > Mk5 General Area
Wheels rubbing after fitting new coilovers.
ROH ECHT:
--- Quote from: breeze on May 15, 2023, 03:21:04 pm ---Factory wheels have a 51mm offset. So 45mm means the wheel would be 6mm further out if the same width. In addition, you have half an inch of extra width, which is 12.7mm. So in total the wheel rim is 18.7mm further out.
--- End quote ---
Just wanted to point out the tiny error in the math...if I am correct.
Please correct me if wrong.
For the 225/40 tire w/tread width of 7" to 7.5":
This is in assuming the same size rubber is used and not focusing on the wheel.
The tire's tread width itself is only going 6mm more outward for the change in wheel offset.
The angle of the sides to the tread are what make up the additional width of the wheel. The tread width itself doesn't stretch.
But for the wheel:
Yes; 6 mm for the offset.
*correction to the error* - the additional wheel width of 12.7 mm is split in half sending 6.35 mm of the wheel inward and the same outward from the center of the wheel.
Total additional 'wheel' going outward is: 6 mm (change in offset) + 12.7 mm(0.5) = 12.35 mm.
Clarkj93:
--- Quote from: breeze on May 15, 2023, 03:21:04 pm ---Factory wheels have a 51mm offset. So 45mm means the wheel would be 6mm further out if the same width. In addition, you have half an inch of extra width, which is 12.7mm. So in total the wheel rim is 18.7mm further out. I am assuming your are not running spacers. Tyre is wider than the wheel, but obviously the above means that the tyre will be further out too, even if the same width.
One of the things you can try is loosening the three top mount bolts and pushing the top of the strut inwards. That will reduce camber and have the effect of tucking the top of the wheel further in. Nowhere near as good as adjustable top mounts but it is free and something you can try immediately. You might be able to do that by bending the rain tray but I removed the wiper arms when I did it.
--- End quote ---
Cannot see how that is possible? The strut tower has no play in terms of where the strut is mounted?
breeze:
--- Quote from: Clarkj93 on May 16, 2023, 04:33:40 pm ---
--- Quote from: breeze on May 15, 2023, 03:21:04 pm ---Factory wheels have a 51mm offset. So 45mm means the wheel would be 6mm further out if the same width. In addition, you have half an inch of extra width, which is 12.7mm. So in total the wheel rim is 18.7mm further out. I am assuming your are not running spacers. Tyre is wider than the wheel, but obviously the above means that the tyre will be further out too, even if the same width.
One of the things you can try is loosening the three top mount bolts and pushing the top of the strut inwards. That will reduce camber and have the effect of tucking the top of the wheel further in. Nowhere near as good as adjustable top mounts but it is free and something you can try immediately. You might be able to do that by bending the rain tray but I removed the wiper arms when I did it.
--- End quote ---
Cannot see how that is possible? The strut tower has no play in terms of where the strut is mounted?
--- End quote ---
There is a small amount of movement in the bolt holes. You loosen the three bolts, push in and tighten. You will not get much, and it will depend on how it was fitted originally. Given it is free and easy I’d say worth doing.
breeze:
--- Quote from: ROH ECHT on May 16, 2023, 04:07:15 pm ---
--- Quote from: breeze on May 15, 2023, 03:21:04 pm ---Factory wheels have a 51mm offset. So 45mm means the wheel would be 6mm further out if the same width. In addition, you have half an inch of extra width, which is 12.7mm. So in total the wheel rim is 18.7mm further out.
--- End quote ---
Just wanted to point out the tiny error in the math...if I am correct.
Please correct me if wrong.
For the 225/40 tire w/tread width of 7" to 7.5":
This is in assuming the same size rubber is used and not focusing on the wheel.
The tire's tread width itself is only going 6mm more outward for the change in wheel offset.
The angle of the sides to the tread are what make up the additional width of the wheel. The tread width itself doesn't stretch.
But for the wheel:
Yes; 6 mm for the offset.
*correction to the error* - the additional wheel width of 12.7 mm is split in half sending 6.35 mm of the wheel inward and the same outward from the vertical center of the wheel.
Total additional 'wheel' going outward is: 6 mm (change in offset) + 12.7 mm(0.5) = 12.35 mm.
--- End quote ---
Good point on the tyre size not changing. I was thinking of the rim but that normally isn’t the point that makes contact with the arch unless you are super low and probably running without a liner. And on airbags or something…
I think you are right on the split of 12.7mm too.
So brilliant advice from me. OP you are safe to ignore. :grin:
ROH ECHT:
--- Quote from: breeze on May 17, 2023, 06:16:34 am ---
--- Quote from: ROH ECHT on May 16, 2023, 04:07:15 pm ---
--- Quote from: breeze on May 15, 2023, 03:21:04 pm ---Factory wheels have a 51mm offset. So 45mm means the wheel would be 6mm further out if the same width. In addition, you have half an inch of extra width, which is 12.7mm. So in total the wheel rim is 18.7mm further out.
--- End quote ---
Just wanted to point out the tiny error in the math...if I am correct.
Please correct me if wrong.
For the 225/40 tire w/tread width of 7" to 7.5":
This is in assuming the same size rubber is used and not focusing on the wheel.
The tire's tread width itself is only going 6mm more outward for the change in wheel offset.
The angle of the sides to the tread are what make up the additional width of the wheel. The tread width itself doesn't stretch.
But for the wheel:
Yes; 6 mm for the offset.
*correction to the error* - the additional wheel width of 12.7 mm is split in half sending 6.35 mm of the wheel inward and the same outward from the vertical center of the wheel.
Total additional 'wheel' going outward is: 6 mm (change in offset) + 12.7 mm(0.5) = 12.35 mm.
--- End quote ---
Good point on the tyre size not changing. I was thinking of the rim but that normally isn’t the point that makes contact with the arch unless you are super low and probably running without a liner. And on airbags or something…
I think you are right on the split of 12.7mm too.
So brilliant advice from me. OP you are safe to ignore. :grin:
--- End quote ---
Alright...cool, thanks. Speaking of a tiny bit of bolt play; there's also a tiny bit of play with the three bolts for the ball joint on the front lower control arm. Of course it is minimal, but there's some. If more neg. camber is sought, one could add a pair of SuperPro or VWR; Roll Center Ball Joints.
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