Mazda CX‌-30 Forum banner
61 - 80 of 87 Posts

·
Registered
'22 2.5T JBM Stealth
Joined
·
175 Posts
Discussion Starter · #61 ·
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).
Yes! That's awesome. Please share pics! 😃
 

·
Registered
325 hp / 400 lb⋅ft
Joined
·
207 Posts
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
 

·
Registered
'22 2.5T JBM Stealth
Joined
·
175 Posts
Discussion Starter · #65 ·
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. Here is an updated spreadsheet:

Rectangle Font Parallel Slope Pattern


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.
 

·
Registered
325 hp / 400 lb⋅ft
Joined
·
207 Posts
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.
 

·
Registered
'22 2.5T JBM Stealth
Joined
·
175 Posts
Discussion Starter · #67 ·
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.
 

·
Registered
325 hp / 400 lb⋅ft
Joined
·
207 Posts
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
 

Attachments

·
Registered
'22 2.5T JBM Stealth
Joined
·
175 Posts
Discussion Starter · #70 ·
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
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.
 

·
Registered
325 hp / 400 lb⋅ft
Joined
·
207 Posts
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.
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?
 

·
Registered
'22 2.5T JBM Stealth
Joined
·
175 Posts
Discussion Starter · #72 ·
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.
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.
 

·
Registered
325 hp / 400 lb⋅ft
Joined
·
207 Posts
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.
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
 

·
Registered
325 hp / 400 lb⋅ft
Joined
·
207 Posts
Any rub updates @McMattface ?
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.
 

·
Registered
'22 2.5T JBM Stealth
Joined
·
175 Posts
Discussion Starter · #76 ·
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.
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.
 

·
Registered
'22 2.5T JBM Stealth
Joined
·
175 Posts
Discussion Starter · #77 · (Edited)
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.
 

·
Registered
2022 Mazda CX-30 Turbo Premium Soul Red
Joined
·
53 Posts
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.
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.
 

·
Registered
325 hp / 400 lb⋅ft
Joined
·
207 Posts
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!
 
61 - 80 of 87 Posts
Top