245/35/R19 tires + 19x8 +40 wheels

Dar_T said:

+32 you'll have some pretty big poke if you're into that look. Also with 19's and 245/40 I can guarantee you'll rub if those CS springs are even lower than the eibach ones I use. I already do with winters at 225 50 17 +38. Also it's not just offset you need to look at but also the rim design. Even with +35's the konig's wouldn't clear my bbk. Mind you I was looking for 17'' rims specifically.

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Hey, thanks for your input!

I definitely don't want the wheels sticking beyond the body; I'm looking for what it may look like if Mazda did OEM 19in wheels with good brakes. I was basing my configuration on this video, where the Konig 18x8 +35 wheels and 215/45R18 tires easily cleared the Corksport BBK. I figured by dropping the sidewall ratio to 40, the 245/40R19 would be (pretty much) comparable to 215/45R18, in terms of diameter.

There's also this, which is the wheel I want installed on a CX-30 (but with 20x8.5 +38 wheels) and 225/40R20 tires.


I figured rubbing wouldn't be such a concern since the "NotSoLow" kit isn't an aggressive drop. The eibach drop is 1.5 front and 2.0 rear, while the Corksport is 1.0 front and 1.6 rear. I don't mind omitting the lowering springs if that prevents the tires from rubbing.

So the safest bet would be to use 19x8 +40 / 245 40R19 (+spacers if needed) and to skip the lowering kit?

Thanks,
Daniel

Dar_T said:

On stock suspension you should be good. Your package would be about 1'' taller than stock but stock suspension sits pretty high.

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Hmm... I see from the tire size calculator that the diameter increases from 26.0" to 26.7" when I go from 225mm (current setup) to 245mm. Definitely should be fine on stock springs, and I think it might just fit with the NotSoLow springs, since I feel the suspension sits quite high even with 225mm tires on stock wheels.

The more aggressive CS lowering springs drops it another 0.5", so if that setup clears stock tires, I think the NotSoLow springs should clear a slightly larger tire.

If there is a conflict, it's a matter of picking either wider tires or lower suspension. I'll take the wider tire in that case.

Dar_T said:

+38 is basically as flush as can be.

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That's very useful to know. I've adjusted to 19x8 +40 / 245 40R19 + NotSoLow springs, and I'll add the minimum spacer required (if any) to clear the brakes.

Thanks again! Will post updates and results.

EDIT: I just realized I could just drop the tire sidewall ratio from 40 to 35, and that brings everything back into spec. So, 19x8 +40 / 245 35R19 + NotSoLow springs.

Need to start watching for potholes, though...

Got tires mounted on the wheels and installed them today. It's just barely flush.

Love how it looks already; can't wait to see it with NotSoLow springs & big brakes (arriving later this week).

Finished lowering it today. No rubbing whatsoever, even on pothole-heavy roads and tight turns.

Tried to install the BBK too but the brake line flare nut is seized and now damn near stripped.

Now waiting on a MAP torch, flare wrenches, and some divine intervention. And yes, black lug nuts are on the way.

Dar_T said:

My flare nut was also seized when I installed a bbk. The best way I found was to use one of those locking pliers to get it off. I kept slipping on flare nut wrenches.

@JoeMini did you have krown drill holes? or just skip that?

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Thanks, took an hour but mapp torch and locking pliers worked for me.

Results: