Spacers fitted
Discussion
After months of trying to research a solution on how to fill out the rear arches slightly on a MY12 N420 including mulling over buying a set of V12 alloys I finally decided just to go with 11mm H&R hubcentric wheel spacers on the rear wheels. As I couldn't find a lot of information on this topic I thought I would share my research for anybody who is interested.
The thing that put me off the original V12 alloys (which look stunning) was partly the cost, but also a thread I had read on PH where the official response from AM was a no no for a number of reasons.
But I did like the look that the wider 19x11 wheel gave to the rear arches.
As per the diagram above the offset is the distance in mm between the centre line of the alloy (viewed from the front or rear of the car) and the face of the hub which meets the back of the alloy wheel. So for the same width of wheel the greater the (positive) offset the further the wheel will sink into the wheel arch and smaller the offset the more the wheel will protrude outwards.
It gets a little more complicated when you are comparing wheels of different widths.
So.... the V12 alloy I believe is a 19x11 wheel with a 68 offset. This means that the outside face of the wheel is 72mm from the face of the hub and is how much the wheel projects outwards filling the arch. The calculation for this is you divide the 11 inches which is 280mm by 2 to get 140mm which is half the width of the wheel or the centre line (dotted line in picture) and then subtract the offset (140mm-68mm=72mm) - see easy
So onto the calculation on the N420 which has a 19x10 wheel with a 59mm offset (I was surprised I thought it was a 9.5 wheel but when I measured it it was the same as the SP10 rear wheel). The maths again...... divide the 10 inches which is 254mm by 2 to get 127mm (centre line) subtract the 59mm which gives you 68mm and then add the spacer of 11mm to get 79mm which in comparison to the V12 alloys, is 7mm more, meaning it sticks out by 7mm more than a V12 alloy would fitted to the same car.
I hope that at least saves one person some time doing the same.
A picture of the finished result!
The thing that put me off the original V12 alloys (which look stunning) was partly the cost, but also a thread I had read on PH where the official response from AM was a no no for a number of reasons.
But I did like the look that the wider 19x11 wheel gave to the rear arches.
As per the diagram above the offset is the distance in mm between the centre line of the alloy (viewed from the front or rear of the car) and the face of the hub which meets the back of the alloy wheel. So for the same width of wheel the greater the (positive) offset the further the wheel will sink into the wheel arch and smaller the offset the more the wheel will protrude outwards.
It gets a little more complicated when you are comparing wheels of different widths.
So.... the V12 alloy I believe is a 19x11 wheel with a 68 offset. This means that the outside face of the wheel is 72mm from the face of the hub and is how much the wheel projects outwards filling the arch. The calculation for this is you divide the 11 inches which is 280mm by 2 to get 140mm which is half the width of the wheel or the centre line (dotted line in picture) and then subtract the offset (140mm-68mm=72mm) - see easy
So onto the calculation on the N420 which has a 19x10 wheel with a 59mm offset (I was surprised I thought it was a 9.5 wheel but when I measured it it was the same as the SP10 rear wheel). The maths again...... divide the 10 inches which is 254mm by 2 to get 127mm (centre line) subtract the 59mm which gives you 68mm and then add the spacer of 11mm to get 79mm which in comparison to the V12 alloys, is 7mm more, meaning it sticks out by 7mm more than a V12 alloy would fitted to the same car.
I hope that at least saves one person some time doing the same.
A picture of the finished result!
The only problem with the above is that you really can't measure the wheel since it will give you a value which is more than the real width, which is stamped on the inside of the wheel. So your 10" wheel is probably 9.5" as you originally thought. And that means that the wheel + spacer really has the same outward projection as the 11" V12 wheel.
Perhaps a dumb question, but if you move the wheel so its flush with the bodywork (as far as allowed for MOT regs) then do you not get a lot more debris thrown up onto the surrounding area rather than staying in the wheel well ? I guess not an issue if you have armourfend film fitted etc
DB9Volantedriver - I think you may be right about the size. I measured from outside edge to outside edge and it was just over 10 1/4 inches which led me to believe it was a 10j wheel. I looked all over the inside of both rear wheels but didn't see a size stamp anywhere. No matter I am very pleased with the result it was more about getting the look right.
I installed 11mm spacers before to a Porsche Cayman S which was a 10j wheel. As the wheel was flush I didn't notice any difference to the surrounding paintwork and I am pretty fussy. However the Aston's paint is definitely softer than Porsche's.
If you extend the tyre outside the bodywork then yes you would definitely incur some chipping but I think at that point the car would also look like a roller skate.
Never seen a V8V with the DBS alloys - do you have a pic?
I installed 11mm spacers before to a Porsche Cayman S which was a 10j wheel. As the wheel was flush I didn't notice any difference to the surrounding paintwork and I am pretty fussy. However the Aston's paint is definitely softer than Porsche's.
If you extend the tyre outside the bodywork then yes you would definitely incur some chipping but I think at that point the car would also look like a roller skate.
Never seen a V8V with the DBS alloys - do you have a pic?
DBS wheels
Some nice pictures of a black one on 6speedonline, gives a better shot of the way the wheels fill the arch.
http://www.6speedonline.com/forums/aston-martin/38...
Pics with V12 wheels on, you will see they sit too far in the arch.... due to high offset
DBS wheels will be going back on soon.
Some nice pictures of a black one on 6speedonline, gives a better shot of the way the wheels fill the arch.
http://www.6speedonline.com/forums/aston-martin/38...
Pics with V12 wheels on, you will see they sit too far in the arch.... due to high offset
DBS wheels will be going back on soon.
Gassing Station | Aston Martin | Top of Page | What's New | My Stuff