2017~2021 Are 255/55R18 PS4s on a CX-5 Turbo a bad idea?

I just bought a White 2021 CX-5 Signature and I'm already thinking about summer. My plan is to use the current Toyo A36 all seasons for the mild winters where I live and run summer tires from Spring-Fall

Any suggestions on rims and tires? I want to get good performance and ride quality for a reasonable price. Looks are secondary as my girlfriend is going to curb them anyway.

I'm planning to downsize to 18s to save weight, money, and my back from bumps.

I was thinking Michelin Pilot Sport 4 in
255/55R18. I'd wanted to go a bit wider than the stock 225s, because reviewers seem to think the CX-5 Turbo is under-tired for fuel economy reasons.

245/55R18 would be ideal from a wheel diameter perspective - 255/55 is 1% larger than stock which means worse gearing. The narrower tires would also mean I could use cheaper 8 inch wheels. However, the tire selection in that size seemed too poor.

For rims, I was looking at Motegi Racing MR146 SS6 in 18x18.5 black https://www.motegiracing.com/product/wheels/mr146-ss6/?attribute_pa_finish=satin-black
They seemed to be the cheapest semi-reputable option below 20lb. I'm looking for a comprimise between Chinesium rims I hate and Enkois that I'll cry over when my girlfriend curbs them.
 
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yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
I just bought a White 2021 CX-5 Signature and I'm already thinking about summer. My plan is to use the current Toyo A36 all seasons for the mild winters where I live and run summer tires from Spring-Fall

Any suggestions on rims and tires? I want to get good performance and ride quality for a reasonable price. Looks are secondary as my girlfriend is going to curb them anyway.

I'm planning to downsize to 18s to save weight, money, and my back from bumps.

I was thinking Michelin Pilot Sport 4 in
255/55R18. I'd wanted to go a bit wider than the stock 225s, because reviewers seem to think the CX-5 Turbo is under-tired for fuel economy reasons.

245/55R18 would be ideal from a wheel diameter perspective - 255/55 is 1% larger than stock which means worse gearing. The narrower tires would also mean I could use cheaper 8 inch wheels. However, the tire selection in that size seemed too poor.

For rims, I was looking at Motegi Racing MR146 SS6 in 18x18.5 black https://www.motegiracing.com/product/wheels/mr146-ss6/?attribute_pa_finish=satin-black
They seemed to be the cheapest semi-reputable option below 20lb. I'm looking for a comprimise between Chinesium rims I hate and Enkois that I'll cry over when my girlfriend curbs them.
I can see black rubbing marks on my front struts with factory 225/55R19 tires. If you want wider tires than 225, you’re running the risk of rubbing the front strut unless you add spacer or change the wheel offset. Either way it’d change the suspension geometry and complicate the tire alignment, not to mention adding more load on suspension components which would reduce their designed service life.
 
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You’ll be fine with that size tire with lower offset wheel. Need to find a pic, but we’ve got powder coated rx8 wheels on our ‘19 at only 21 lbs per wheel. Benefit to these wheels is they are the same centerbore (so no centering rings) and can use stock lug nuts. 50mm offset would necessitate spacers for tires much wider than 235mm

Another great wheel option would be off the Lancer Evolutions...they have relatively light cast 17’s & 18’s by Enkei, as well as super light forged 17’s and 18’s by BBS. Same bolt pattern, same centerbore, and slightly wider & lower offset which would be perfect for wider tires on a cx5. Was going to go this route but found the rx8 wheels for a lot less $$$ so went with those.

FYI, late model Ferrari & Maserati wheels also share the same bolt pattern & centerbore as our cx5. Almost out a set of staggered California Speedline 19’s on ours, but the rear 19x10’s wouldn’t clear the subframe. Small spacer would’ve fixed it but went with the rx8’s instead
 
879318BC-9380-44BF-8EEC-EFF4CBF01494.jpeg
 
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2018 AWD GT Premium Red/Black
You’ll be fine with that size tire with lower offset wheel. Need to find a pic, but we’ve got powder coated rx8 wheels on our ‘19 at only 21 lbs per wheel. Benefit to these wheels is they are the same centerbore (so no centering rings) and can use stock lug nuts. 50mm offset would necessitate spacers for tires much wider than 235mm

Another great wheel option would be off the Lancer Evolutions...they have relatively light cast 17’s & 18’s by Enkei, as well as super light forged 17’s and 18’s by BBS. Same bolt pattern, same centerbore, and slightly wider & lower offset which would be perfect for wider tires on a cx5. Was going to go this route but found the rx8 wheels for a lot less $$$ so went with those.

FYI, late model Ferrari & Maserati wheels also share the same bolt pattern & centerbore as our cx5. Almost out a set of staggered California Speedline 19’s on ours, but the rear 19x10’s wouldn’t clear the subframe. Small spacer would’ve fixed it but went with the rx8’s instead
Did you get those powder coated yourself, or did they come that way? I like the look, I considered getting them when hunting for winter tire wheels.

Bonus, they look easy to clean. I like the ones I got for my 19s, but they are a real pain to clean.
 
I had them powder coated and yes they’re super easy to clean. Running 235/60/18 tires that barely clear the front struts, but no spacers, rings, etc. They bolt right up with stock lugs as if they came factory