Hey All,
I just bought my first cooper. Its a 2012 SD Roadster (R59).
Ive been reading through the forums but can mostly find stuff related to the R56 model. I suspect that most wheels that fit R56 should fit on my R59? Anyone knows?
I would like to go for 235/40 R17 tires on a 7.5 wide rim, it looks awesome on the pictures of R56 models Ive seen, but Im wondering, in sweden were i live its illegal for the wheels to be wider than the fenders, so will this work at all?
Anyone that runs tires this wide and feel any downsides in handling?
Thankful for any help!
Best regards
Lars
I just bought my first cooper. Its a 2012 SD Roadster (R59).
Ive been reading through the forums but can mostly find stuff related to the R56 model. I suspect that most wheels that fit R56 should fit on my R59? Anyone knows?
I would like to go for 235/40 R17 tires on a 7.5 wide rim, it looks awesome on the pictures of R56 models Ive seen, but Im wondering, in sweden were i live its illegal for the wheels to be wider than the fenders, so will this work at all?
Anyone that runs tires this wide and feel any downsides in handling?
Thankful for any help!
Best regards
Lars
Yes, R59 uses the same wheel size as the R56. If you have JCW front brake calipers they will require wheels that are larger in diameter like 17" or 18" and cannot fit 15" wheels.
Which specific 235/40-17 tire did you want to use? That size is very aggressive and few tires suitable for street use (two Ultra High Performance Summer and a few Extreme Summer tires or race tires - not for street use).
235/40-17 fits wheels 8-9.5" wide and is perfect for 8.5" wide rims. Using a 17x7.5" rim will work but it is very narrow for this tire width. The tire will look pinched inward and the treads will bulge a bit at the shoulder blocks.
If you use a stock 17x7" et48 rim for comparison, the 17x7.5" rim with et42 mm will be 0.4mm closer to the inner suspension and poke out 12.4mm more which is fine for a "flushed" look with the inner wheel arches (fender edge). An offset up to about 38mm will also work but poke out a few mm more.
A picture of a 235/40-17 tire on a 17x7.5" rim looks like this-
http://i44.photobucket.com/albums/f1...-40-17tire.jpg
The same wheel and tires on a BMW looks like this:
http://www.r3vlimited.com/board/atta...6&d=1315104987
Compared to OEM 205/45-17 tires the 235/40-17 will have a stiffer ride on anything but very smooth roads, you have good handling and responsiveness due to the smaller 40 series sidewalls. Extreme Summer tires tend to be noisy and wear out faster, some are better than others in rain. Summer tires are not for any cold weather or snow. 235mm wide tires will increase rolling resistance and decrease mpg efficiency a little.
If you need tires that will be OK in cold weather and light snow then Ultra High Performance All Season tires would be a better choice. If so, then stick to 205/45-17 or 215/45-17 tire sizes. 225/45-17 is too tall.
Which specific 235/40-17 tire did you want to use? That size is very aggressive and few tires suitable for street use (two Ultra High Performance Summer and a few Extreme Summer tires or race tires - not for street use).
235/40-17 fits wheels 8-9.5" wide and is perfect for 8.5" wide rims. Using a 17x7.5" rim will work but it is very narrow for this tire width. The tire will look pinched inward and the treads will bulge a bit at the shoulder blocks.
If you use a stock 17x7" et48 rim for comparison, the 17x7.5" rim with et42 mm will be 0.4mm closer to the inner suspension and poke out 12.4mm more which is fine for a "flushed" look with the inner wheel arches (fender edge). An offset up to about 38mm will also work but poke out a few mm more.
A picture of a 235/40-17 tire on a 17x7.5" rim looks like this-
http://i44.photobucket.com/albums/f1...-40-17tire.jpg
The same wheel and tires on a BMW looks like this:
http://www.r3vlimited.com/board/atta...6&d=1315104987
Compared to OEM 205/45-17 tires the 235/40-17 will have a stiffer ride on anything but very smooth roads, you have good handling and responsiveness due to the smaller 40 series sidewalls. Extreme Summer tires tend to be noisy and wear out faster, some are better than others in rain. Summer tires are not for any cold weather or snow. 235mm wide tires will increase rolling resistance and decrease mpg efficiency a little.
If you need tires that will be OK in cold weather and light snow then Ultra High Performance All Season tires would be a better choice. If so, then stick to 205/45-17 or 215/45-17 tire sizes. 225/45-17 is too tall.
Hey,
thanx for the detailed response, I was thinking of running on Continental Sport Contact 5 or Good Year Eagle F1. Im only driving it the summer season, april to october, so temperatures will mostly be over 10 degrees celcius.
I thought I understood the offset values on rims but now Im confused again, I thought the stock offset on minis were +52 and moved down to ET40 the rim would be 12 mm closer to the suspension. But does that depend on the rim width?
I will also probably lower the car by about one inch or 25mm. I guess this wont affect much on the space needed for wider tires.
Thanks for your help!
thanx for the detailed response, I was thinking of running on Continental Sport Contact 5 or Good Year Eagle F1. Im only driving it the summer season, april to october, so temperatures will mostly be over 10 degrees celcius.
I thought I understood the offset values on rims but now Im confused again, I thought the stock offset on minis were +52 and moved down to ET40 the rim would be 12 mm closer to the suspension. But does that depend on the rim width?
I will also probably lower the car by about one inch or 25mm. I guess this wont affect much on the space needed for wider tires.
Thanks for your help!
Quote:
thanx for the detailed response, I was thinking of running on Continental Sport Contact 5 or Good Year Eagle F1. Im only driving it the summer season, april to october, so temperatures will mostly be over 10 degrees celcius.
I thought I understood the offset values on rims but now Im confused again, I thought the stock offset on minis were +52 and moved down to ET40 the rim would be 12 mm closer to the suspension. But does that depend on the rim width?
I will also probably lower the car by about one inch or 25mm. I guess this wont affect much on the space needed for wider tires.
Thanks for your help!
Sorry for the confusion you can check the wheel specs for your own wheel by looking at the inside of the wheel hub once removed from the car.Originally Posted by Marcurell
Hey,thanx for the detailed response, I was thinking of running on Continental Sport Contact 5 or Good Year Eagle F1. Im only driving it the summer season, april to october, so temperatures will mostly be over 10 degrees celcius.
I thought I understood the offset values on rims but now Im confused again, I thought the stock offset on minis were +52 and moved down to ET40 the rim would be 12 mm closer to the suspension. But does that depend on the rim width?
I will also probably lower the car by about one inch or 25mm. I guess this wont affect much on the space needed for wider tires.
Thanks for your help!
MINI made standard wheel sizes in general but there are a few exceptions here and there.
OEM 16x6.5" et 48
OEM 17x7" et 48
OEM 18x7" et 52 such as JCW wheels
R60 got slightly different wheels:
16x6.5" et 46
17x7" et 50
18x7.5" et 52
Yes, the position of the wheel relative to the inner suspension depends on both the width of the wheel and it's offset.
The smaller the offset number the more it pokes outward.
Use this to calculate before and after wheel sizes and tires:
http://www.willtheyfit.com
Quote:
MINI made standard wheel sizes in general but there are a few exceptions here and there.
OEM 16x6.5" et 48
OEM 17x7" et 48
OEM 18x7" et 52 such as JCW wheels
R60 got slightly different wheels:
16x6.5" et 46
17x7" et 50
18x7.5" et 52
Yes, the position of the wheel relative to the inner suspension depends on both the width of the wheel and it's offset.
The smaller the offset number the more it pokes outward.
Use this to calculate before and after wheel sizes and tires:
http://www.willtheyfit.com
Hehe, so I got it the wrong way, thanks for the calculator, no I get it! Larger offset closer to the suspension.Originally Posted by minihune
Sorry for the confusion you can check the wheel specs for your own wheel by looking at the inside of the wheel hub once removed from the car.MINI made standard wheel sizes in general but there are a few exceptions here and there.
OEM 16x6.5" et 48
OEM 17x7" et 48
OEM 18x7" et 52 such as JCW wheels
R60 got slightly different wheels:
16x6.5" et 46
17x7" et 50
18x7.5" et 52
Yes, the position of the wheel relative to the inner suspension depends on both the width of the wheel and it's offset.
The smaller the offset number the more it pokes outward.
Use this to calculate before and after wheel sizes and tires:
http://www.willtheyfit.com
So with your example a 7.5 et 42 rim would be pretty flushed with the fender arch but the tire would probably poke out beyond the fenders widest point. Using the calculator a rim thats 8" et 50 should probably be perfect.
Thanks!
using a 17x8" et50 rim would be-
http://www.willtheyfit.com/index.php...et2=50#content
Compared to your existing wheel, this new wheel will have an inner rim which is 14.7mm closer to the suspension strut. The outer rim will poke out 10.7mm more than before.
14.7mm closer to the suspension is too much, maybe 4mm closer is about enough. In that case a 40-42mm offset would be OK. Wheel will poke out 20mm more but that's the limit to be relatively flush
Using 17x7.5" et42
http://www.willtheyfit.com/index.php...et2=42#content
Compared to your existing wheel, this new wheel will have an inner rim which is 0.4mm closer to the suspension strut. The outer rim will poke out 12.4mm more than before.
This will work as long as you don't drop the suspension much or at all. If the tire is more narrow than OEM then it can look close to flush. If the tire is extra wide vs OEM 205mm then you can also use more front negative camber to tuck the tire inward to make it more flush. You'll need adjustable front camber plates for that.
http://www.willtheyfit.com/index.php...et2=50#content
Compared to your existing wheel, this new wheel will have an inner rim which is 14.7mm closer to the suspension strut. The outer rim will poke out 10.7mm more than before.
14.7mm closer to the suspension is too much, maybe 4mm closer is about enough. In that case a 40-42mm offset would be OK. Wheel will poke out 20mm more but that's the limit to be relatively flush
Using 17x7.5" et42
http://www.willtheyfit.com/index.php...et2=42#content
Compared to your existing wheel, this new wheel will have an inner rim which is 0.4mm closer to the suspension strut. The outer rim will poke out 12.4mm more than before.
This will work as long as you don't drop the suspension much or at all. If the tire is more narrow than OEM then it can look close to flush. If the tire is extra wide vs OEM 205mm then you can also use more front negative camber to tuck the tire inward to make it more flush. You'll need adjustable front camber plates for that.