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Plus Size Tires

46833 Views 236 Replies 27 Participants Last post by  andy.artieda.0321, 
KuroCX30
9
Fitment Calculator:
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CX-30 Fitment.xlsx

Shoes KUROCX30 Fitment Calculator,WHEELS,TIRES Tire,Tire Size,Wheel,Wheel Diameter,Wheel Width,Wheel Offset,Aftermarket Wheel Spacers,Center Moved,Wheel Poke from 18" Stock,Measured Wheel Width for Tire Size,Actual Wheel Overall Width with Rims included,Tire Diameter,% Increase from Stock 18",Ri...
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To use the calculator, fill in the yellow highlighted cells with the data you collect for your selected wheels and tires. Find the specific sized tire on tirerack.com, discounttire.com or the manufactures website. I usually use tirerack.com as my initial source as they do their own internal measuring for accuracy and the only site that provides tread width. They don't always have all the data needed though, so search the web on other sites for missing tire data. Do the same for the wheel but I tend to find the most accurate wheel data from the manufacturer. Once everything is entered, your fitment data will be automatically calculated from the formulas. Some constant valued cells are hidden to keep the presentation clean. I filled in the first row as an example but there are several rows so you can compare several setups. As a disclaimer, I will not and cannot be held responsible or liable for fitments that produce rub or increase wear, damage parts or end up causing accidents or bodily injury. Install aftermarket wheels and tires at your own risk!

General Tire Size Options:
Keep in mind that these are general size groups that I have curated that should be considered for tire sizing. Exact measurements of a tire vary within each size group depending on the tire type, brand and model. Always check the exact measurements at TireRack and the manufacturer's website before making a purchase. Extra caution should be taken with regards to the size groups that are squared in red. These sizes may or may not rub depending on the exact tire measurements, wheel width and wheel offset.
Font Material property Magenta Parallel Symmetry



-------Sizes that Rub-------
Tire Wheel Vehicle Car Grille

29.3" - Instagram - 30on29s
  • Falken Wildpeak A/T Trail 235/60
  • Enkei TS-10 18"x8" +40mm
  • Slight wheel well rub at full turn lock
Tire Wheel Vehicle Car Automotive tire

29.1" - CX30 Talk - McMattface @McMattface
  • Falken Wildpeak A/T Trail 235/65
  • Enkei RPF1 17"x8" +35mm
Wheel Tire Car Vehicle Land vehicle

29.0" - Facebook Mazda CX-30 Owners - Sergio Torres
  • Falken Wildpeak A/T Trail 235/65
  • Hyundai 16"x6.5" +46mm
  • 30mm Lift Kit
Wheel Tire Vehicle Automotive lighting Automotive tire

28.9" - CX30 Talk - KuroCX30 or Instagram - KuroCX30
  • Bridgestone Blizzak DM-V2 215/70
  • Ray's Engineering Daytona M8 17"x7" +40
Tire Wheel Car Vehicle Automotive tire

28.8" - CX30 Talk - Cocoloco
  • Vredestein Quatrac Pro GT All-Season 225/55
  • 2014-17 Mazda6 OEM 19"x7" +45
Tire Wheel Car Vehicle Land vehicle

28.7" - Facebook Mazda CX-30 Owners - Kevin McFarland
  • Falken Wildpeak A/T Trail 225/60
  • Stock 18"x7" +45mm
  • 40mm Lift Kit
Wheel Car Tire Vehicle Automotive tire

28.7"- Facebook Mazda CX-30 Owners - Andrew Anderson
  • Versatyre CRX4000 245/45
  • Curva Concepts C42 20"x8.5" +35mm
-------Sizes that Clear-------
Tire Wheel Car Land vehicle Vehicle

28.6" - Instagram - BayAreaMazda (no longer active)
  • Falken Wildpeak AT3W 225/65
  • KMC KM708 17"x8" +38mm
28.6" - CX30 Talk - KuroCX30 or Instagram - KuroCX30
  • Falken Wildpeak A/T Trail 225/65
  • Enkei RPF1 17"x7" +45mm
28.6" - Instagram - hiroshimaspirit
  • Falken Wildpeak A/T Trail 225/65
  • Fifteen52 Traverse MX 17"x8" +38mm
28.5" - CX30 Talk - KuroCX30 or Instagram - KuroCX30
  • Michelin Pilot Sport 4 SUV 225/65
  • Enkei RPF1 17"x8" +45mm
28.5" - Instagram - Joe Trevino @Copland Navi
  • Nitto Nomad Grappler 225/65
  • Falcon V2 17"x8" +30mm
28.1" - FB Mazda CX-30 Owners - Chris Howard
28.1" - FB Mazda CX-30 Owners - Keith Wagner
  • Falken Wildpeak A/T Trail 235/55
  • Enkei TFR 18"x8" +40mm
28.1" - CX30 Talk - lupineblue @lupineblue
  • BFGoodrich Trail Terrain 104H 235/55
  • Stock 18"x7" +45mm
28.1" - CX30 Talk - CX-30 Toy @CX30-TOY
  • Michelin Crossclimate2 235/60
  • Enkei PF05 17"x8" +30mm
28" - Instagram - Joe Trevino @Copland Navi
  • Falken Wildpeak A/T Trail 215/65
  • Falcon V2 17"x8" +30mm
27.9 " - Mazda CX-30 Club (North America) - Patrick Kelly
  • General Grabber A/Tx 215/70
  • 2010 Mazda3 OEM 16"x6.5" +50mm with spacers
27.9" - Instagram - jb74jl808 (username changed)
  • BFGoodrich T/A KO2 215/70
  • Delta Force Oval 16"x7" +35mm
27.9" - CX30 Talk - v24design or Instagram - v24design @v24design
  • Toyo Open Country AT3 - 215/70
  • Method MR502 Rally 16"x7" +30mm
27.7" - Instagram - mackeby184
  • Goodyear F1 Assymetrical 5 245/45
  • BBS CI-R 18"x8.5" +43mm
27.7" - CX30 Talk - Tom Servo @Tom Servo
  • Continental ExtremeContact DWS06 Plus 245/45
  • Niche Gamma M224 19"x8.5" +35mm
27.3" (OEM Tire Diameter)

Instagram - mazdacx30turbo
  • Falken Wild Peak A/T Trail 235/50
  • Konig Dekagram 18"x8.5" +45mm
  • Slight rear suspension rub
Instagram - mazdacx30turbo
  • Falken Wild Peak A/T Trail 235/50
  • Fifteen52 Turbomac 18"x8.5" +30mm
CX30 Talk - key1cc
  • Falken Wild Peak A/T Trail 235/50
  • Stock 18"x7" +45mm
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KuroCX30
McMattface said:
Got some news. Went with 17x8 Enkei RPF1s @ 35mm offset, 235/65/17 AT3Ws (I know, I know but they look better in real life 😂).

No rub on full lock 👍 and I think that's the first confirmed 29" wheel without any (but it's crazy close).
Click to expand...
Yes! That's awesome. Please share pics! 😃
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McMattface
KuroCX30 said:
Yes! That's awesome. Please share pics! 😃
Click to expand...
Here's a quick shot I just did in the parking lot. My black roof rails are half-installed (hole alignment issues, had them off today except the brackets)

I'll do some more with various angles and etc once I wrap up a few other items.

Tire Wheel Vehicle Car Automotive tire
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KuroCX30
Absolute monsters. They look so much bigger than the 225/65 trails. 🤣 Love it, great job. Looking forward to more pics.
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McMattface
5
Some other (more informational) photos
Front view:
Vehicle registration plate Tire Plant Vehicle Grille


Rear poke
Tire Wheel Vehicle Car Hood


Wheel well fill
Wheel Car Tire Land vehicle Vehicle


Front poke
Car Tire Vehicle Wheel Hood


Literally a hairs worth of clearance at full-lock 😂 but should get better as the tire wears. I've yet to hear/feel/see any signs of rub but will let you know if I run into a situation where it happens.
Brown Tire Wheel Automotive tire Tread
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KuroCX30
The sidewall is toned down but they still look meaty on a CX-30 with the RPF1. Coming in at -1.6 lb vs stock is really impressive as well. How do they feel?

So the only step between these AT3W's at 29.1" and Chuck's (30on29s) 29.3" is the Falken A/T Trail 235/65r17 at 29.2". They come in at 5 lb heavier, so I doubt I ever go there. Someone will though, the final frontier lol.

I also added an owner on Instagram. I helped dial in a set of RPF1s. 17x8 with 225/65r17 FWPAT Trails, flush in front with tuck in the rear.
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McMattface
So far they ride very nice!

Sound: I was a little torn because I've read the A/T Trails run a little quieter than the A/T3Ws, and while I don't really have a lot to compare them to, the A/T3Ws seem to do very well in that area. I do notice a slight white-noise like sound from time to time, but it's so subtle I don't hear it unless it's silent in the cabin and I'm listening for it. To be honest I can't really recall if that was the same with the stock tires, but I guess not being able to tell is a good sign.

Handling: I haven't taken them off road yet so can't speak to that, but I have noticed better cornering than before. I wasn't sure what to expect since the increased width /wider stance should've helped in that area, but didn't know what impact the tread design and extra meat would have. Everything rides smooth, little bumps are less noticable. The car feels like it's riding much higher than before. I'm measuring 11" behind the front tire and 11 3/4" in front of the rear wheel -- granted there are lower-lying things further under the car, it was a bit surprising to see it against a tape measurer!


Automotive tire Tire Road surface Bumper Wood


Acceleration: Weight was one of my concerns, and with such a larger tire, I was basically just trying to keep it as close to stock weight as possible. I expected to lose a little performance simply due to the larger diameter, which I thought I noticed at first. It's hard to say because I've done a number of performance mods and was in the process of dialing things in when I had these installed. At the moment it (expectedly) performs much better than stock, but I also added ~75HP / ~80TQ at the crank and am running a throttle controller as well.

Still no rub but I find myself trying to get it 😂 it's so close I have a hard time understanding why it isn't happening.
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KuroCX30
I'm willing to bet that increased noise comfort comes from being an OEM part, where as the other size offerings are not as subtle. Best of both worlds with the 235/65.🙂 75 hp and 80 tq on top of reduced unsprung weight. 😃😍 That's awesome. Should be pretty fun taking that on some trails. Look forward to some photos of your adventures.
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key1cc
WOW...:love: !!!

(The hearts are for the car not you Bro...)

Key1
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McMattface
4
I think I have spotted signs of rubbing 👀

I still haven't heard of felt anything, but today I turned my wheels to look at the area hidden by the wheel itself (sort of behind), and spotted what I think are marks from contact. They are small areas despite the pictures making it look big (zoomed in all the way).

Front part of the wheel well, where I rubbed away some of the dirt to feel for abrasions. Felt smooth but the position (and look) of that mark is right where I'd expect rubbing to occur...

Automotive tire Wood Tread Grey Rim


Back part of the wheel well. Same, in the place where rubbing would most likely occur, and dirt in a shape/texture that looks like possible rubbing
Tire Automotive tire Tread Wood Grey

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KuroCX30
McMattface said:
I think I have spotted signs of rubbing 👀

I still haven't heard of felt anything, but today I turned my wheels to look at the area hidden by the wheel itself (sort of behind), and spotted what I think are marks from contact. They are small areas despite the pictures making it look big (zoomed in all the way).

Front part of the wheel well, where I rubbed away some of the dirt to feel for abrasions. Felt smooth but the position (and look) of that mark is right where I'd expect rubbing to occur...
Back part of the wheel well. Same, in the place where rubbing would most likely occur, and dirt in a shape/texture that looks like possible rubbing
Click to expand...
Yeah that's minor rub but nothing I would worry about. How often are you at full turn and at what speed, 5mph? I will revise it on the spreadsheet though. Thanks for the update.
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McMattface
KuroCX30 said:
Yeah that's minor rub but nothing I would worry about. How often are you at full turn and at what speed, 5mph? I will revise it on the spreadsheet though. Thanks for the update.
Click to expand...
I find myself at full lock quite often recently 😂

But usually it's not an entirely uncommon experience. When backing out of my garage, I often full-lock it in reverse because I'm in a cul de sac with vehicles parked on the street, and that speed is low (5 mph sounds about right).

I tried full-lock again today, going forward, with both windows down and my head sticking out of the window -- still no noise or vibrations.

I'm going to put on my Sherlock hat for a second and analyze these marks. Normally when you see "regular" rub, the area is actually cleaner-looking than the surrounding areas due to the ambient dirt being worn away. In this case it looks like the opposite, which could either be the result of just having a clean wheel well or perhaps these marks came from a less regular occurrence -- full lock on a dip or something similar -- and is the result of a singular-ish scrape?
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KuroCX30
McMattface said:
I tried full-lock again today, going forward, with both windows down and my head sticking out of the window -- still no noise or vibrations.
Click to expand...
Picturing this is pretty funny 😁. Have you checked full lock with a second person? I found that there is some tension that relaxes from full lock if you release the steering wheel by yourself and get out to do the check, allowing for a few millimeters of leeway.
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McMattface
KuroCX30 said:
Picturing this is pretty funny 😁. Have you checked full lock with a second person? I found that there is some tension that relaxes from full lock if you release the steering wheel by yourself and get out to do the check, allowing for a few millimeters of leeway.
Click to expand...
I think that was part of the issue in the beginning. I pulled the wheel full lock again and tied it off to keep it from relaxing, still very close...I want to say touching if not for the absence of noise while doing the same while driving. Either way its really close, too close to be certain either way but clearly there was some sort of contact, just don't know if it's under particular circumstances or anytime at full lock
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KuroCX30
Any rub updates @McMattface ?
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McMattface
KuroCX30 said:
Any rub updates @McMattface ?
Click to expand...
Yes, so that area of dirt I rubbed off (to feel for abrasions) appears to have re-scuffed at some point -- though like before, I've never once heard or felt any rubbing despite my best efforts. It's a moot exercise at this point, I'm fairly certain there is indeed rub, its just too minor to notice when it happens.

I've done some research into what can be done to remedy it (aside from smaller wheels). There are steering rack travel limiters you can install on the tire rods, little plastic c-clips that just pop on and reduce how far the tires can pivot. I don't really want to do that but could.

You can also use a heat gun to soften that part of the wheel well liner, and use a broom handle (or something else) to push on the effected areas. You then spray water to lock that new shape into place and Voila! I think i'll give that a go at some point, seems like an easy/minimally invasive way to get an extra 1/4" of clearance where you need it.
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KuroCX30
McMattface said:
Yes, so that area of dirt I rubbed off (to feel for abrasions) appears to have re-scuffed at some point -- though like before, I've never once heard or felt any rubbing despite my best efforts. It's a moot exercise at this point, I'm fairly certain there is indeed rub, its just too minor to notice when it happens.

I've done some research into what can be done to remedy it (aside from smaller wheels). There are steering rack travel limiters you can install on the tire rods, little plastic c-clips that just pop on and reduce how far the tires can pivot. I don't really want to do that but could.

You can also use a heat gun to soften that part of the wheel well liner, and use a broom handle (or something else) to push on the effected areas. You then spray water to lock that new shape into place and Voila! I think i'll give that a go at some point, seems like an easy/minimally invasive way to get an extra 1/4" of clearance where you need it.
Click to expand...
Yeah I think the first option is a bit too much for such a minor issue. The latter is the way to go. Thanks for the update.
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KuroCX30
Updated Chart: In addition to the bulge measurement, I added another column to get a perspective of the curvature width distance from the end of the tread to the outer most portion of the sidewall. This could be a secondary visual marker of how your tires may look when mounted. Another way to think about this would be how vertical your sidewall is in relation to the end of the tread.
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kefkafloyd
McMattface said:
Yes, so that area of dirt I rubbed off (to feel for abrasions) appears to have re-scuffed at some point -- though like before, I've never once heard or felt any rubbing despite my best efforts. It's a moot exercise at this point, I'm fairly certain there is indeed rub, its just too minor to notice when it happens.

I've done some research into what can be done to remedy it (aside from smaller wheels). There are steering rack travel limiters you can install on the tire rods, little plastic c-clips that just pop on and reduce how far the tires can pivot. I don't really want to do that but could.

You can also use a heat gun to soften that part of the wheel well liner, and use a broom handle (or something else) to push on the effected areas. You then spray water to lock that new shape into place and Voila! I think i'll give that a go at some point, seems like an easy/minimally invasive way to get an extra 1/4" of clearance where you need it.
Click to expand...
Perhaps thermal expansion and suspension travel might be the culprit here? Are you measuring lock-to-lock on hot tires? If you're running really tight tolerances, that could definitely start coming into play.
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McMattface
Yeah, usually i'd take a look after a drive so maybe that's a contributor. I picked up a heat gun and am going to try that trick to create a little extra space in those specific spots. I'll let every know how it goes!
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key1cc
3
I added new tires to Turbo CX-30.
Falken Wild Peaks A/T Trail.
On Stock Rims: 18 x 7"
Tire rim range spec: 6.5" - 8.5"
new tire size: 235/50/18
No rubbing or touching.
About 1/4" space remains between rear shock and tire inner wall
Pics below:
Tire Vehicle Wheel Car Window



Tire Automotive tire Automotive design Tread Hood





Bumper Gas Automotive exterior Auto part Composite material
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