Wheel size/offset questions
Posted: Mon Jan 21, 2019 4:09 pm
Hello all
I'm planning to change my stock 17" rims to some 18" Enkei T6S soon (avoiding 19" because of ride quality, risk of pothole damage and price), and I'm having a bit of a hard time with the offset/width calculations as I am seriously mathematically challenged.
As far as I can work out, my 2009 23i has a front wheel size of 17x8 29ET and rears of 17x8.5 40ET.
My first bunch of questions are, do I want/need to get wider wheels as well as larger? If so, should I be getting 18x8.5 fronts and 18x9.5 rears, or 18x8.5 and 18x9 to keep with the stock "ratio"? Does it make much difference besides aesthetics?
Next, what offset range would work? I don't want to use spacers. Am I correct in thinking that if I stick to the stock offsets of 29 and 40, I should be good to go even with wider rims? Or is there a different offset recommended that would look/perform better because of the increased width of the rims? I'm seeing so many different combinations in my research that it's making my head spin.
Thank you!
I'm planning to change my stock 17" rims to some 18" Enkei T6S soon (avoiding 19" because of ride quality, risk of pothole damage and price), and I'm having a bit of a hard time with the offset/width calculations as I am seriously mathematically challenged.
As far as I can work out, my 2009 23i has a front wheel size of 17x8 29ET and rears of 17x8.5 40ET.
My first bunch of questions are, do I want/need to get wider wheels as well as larger? If so, should I be getting 18x8.5 fronts and 18x9.5 rears, or 18x8.5 and 18x9 to keep with the stock "ratio"? Does it make much difference besides aesthetics?
Next, what offset range would work? I don't want to use spacers. Am I correct in thinking that if I stick to the stock offsets of 29 and 40, I should be good to go even with wider rims? Or is there a different offset recommended that would look/perform better because of the increased width of the rims? I'm seeing so many different combinations in my research that it's making my head spin.
Thank you!