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2018 Kia Optima
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Discussion Starter #1 (Edited)
Hey everyone. Just picked up an 18” Sangria LX. Currently on stock suspension, I was wonder what wheel spec do I need for flush setup. Currently eyeing this set of ESR CS11 18x8.5 +30 5x114.3. Will it fit ok or do I need a different offset?
 

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2015 Kia Optima
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I find this page to be very helpful for this. Rim & Tire Size Calculator. Custom Offsets Put in your stock wheels/tires and the ones you want and it will show you what changes. Lower offset is going to move the wheels out. What size tire are you going with? I have 19x8.5's and with a 225, it's the most stretch I'd want to have. I wish I could have got the same wheels in a 7.5" or 8" width, but they don't make them.
 

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2018 Kia Optima
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Discussion Starter #3
I’m thinking 235/40/18, but on stock height do you think it’s still too small? Should I go with 19?
 

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Going up on rim size means shorter sidewall to maintain the same overall tire height and speedo calibration. What size tire is on that car now?
 

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2018 Kia Optima
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I’m thinking 235/40/18, but on stock height do you think it’s still too small? Should I go with 19?
What exactly do you mean by "flush setup"? If I were to presume that your car is currently running the stock 215/55-17 tires, then 235/40-18 will be 0.9" smaller in overall diameter vs. OEM 17" and 18"; OEM 18" size is 235/45-18, with 19" non-OEM equivalent being 235/40-19 (only 0.1" larger in diameter vs. OEM 18"). Some folks run 245/40-19 but that'll run you 0.4" larger in overall diameter vs. OEM 18". On top of that, even with like sizes there can be some minor variances between tire manufacturers so there's that.
 

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2018 Kia Optima
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Discussion Starter #6
Stock tires 215/55/17. I figured out to get the same diameter I would have to get 235/45/18. But now the offset. I really want an 8.5in wheel. But at +35 do you think it will hit the fenders on bumps? I’m still on stock suspension, but south jersey has horrible roads.
 

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Discussion Starter #8
What exactly do you mean by "flush setup"? If I were to presume that your car is currently running the stock 215/55-17 tires, then 235/40-18 will be 0.9" smaller in overall diameter vs. OEM 17" and 18"; OEM 18" size is 235/45-18, with 19" non-OEM equivalent being 235/40-19 (only 0.1" larger in diameter vs. OEM 18"). Some folks run 245/40-19 but that'll run you 0.4" larger in overall diameter vs. OEM 18". On top of that, even with like sizes there can be some minor variances between tire manufacturers so there's that.
Hi, I meant flush with the fenders. I need help finding the offset for an 8.5in for stock height. Roads are too bad here to lower it at the moment.
 

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Stock height for now. Springs coming soon and the 225/40's should clear without issue. Wider tires might have rubbed.
 
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