God Spec info 18x10 +40 (pictures, alignment specs, tire info)

[optronix]

You know, I didnt even think about bump stops because I trim only what is required (again, never an issue) and completely forgot other people/shops may not follow that same guidance. So good call @HondaHoon

So its a very good idea to check even though its going to be super tricky (or impossible) to check without finagling the dust covers off or enough to expose the bumpstops somehow if you arent taking out the struts.

Yeah... that's a part I'm a bit worried about. But it also kind of validates my want for coils. I think I'm gonna go that route regardless, I've been considering it for a while- and only went with springs because I wanted the adjustability. I frankly don't give a shit anymore and would prefer better spring rates and damping.

Due diligence is expected, and if it's not that much hassle to just roll the finders a bit I may consider it just as a stopgap because I don't think I'll be ready to pull the trigger on coils by Monday (maybe idk, I'll think about it if parts availability allows). But I mean, it makes the most sense right now so why not lean into it?

Sponsored

 

[iforgettopee]

can we get back to pictures now...

 

[optronix]

can we get back to pictures now...

Sure, I get that but figured I'd try to at least close the loop. Just suffice to say this is the first (documented) data point of rubbing with this spec. It may or may not be relevant to most folks in this thread, but it is worth mentioning- and I hereby throw down the gauntlet for someone to step up and slap a set of 275 RE-71RZ on an FL5 to prove/disprove if it fits w/no rub or not.

Copy/paste from the update I posted on integraforums bc I'm lazy:

So verdict is in- the tires are just wide lol. The RE-71RZ appear to be on the wider spectrum even for 200TW, and likely run wider than their predecessor RE-71RS (*but note no measurements were taken so take this assessment with the appropriate grain of salt). So it is just a clearance issue. The bump stops appear to be cut correctly for the Eibach springs (which they fuckin should be, despite my existing reservations the shop that did them did have an established known good reputation).

That said the rubbing is extremely minor, and only occurs on very substantial bumps. Not anything I'm likely to come across during an autocross, but possibly a DE in certain conditions. It's just barely coming into contact with the felt/plastic liner so no damage is being done, just some extremely minor scuffing on the sidewalls, visible in the picture I shared above. Rears definitely more than fronts due to the extra camber. No other contact is taking place... and truth be told it appears to have actually mostly resolved already via "self-correction" from the tire wearing through the mm or so of liner. I noticed 3 "incidents" of rubbing on the ~1 hour highway drive to the shop this morning (so like <.01% of overall driving) - and absolutely zero on the way back. (Also the shop may have done some pressing/shaving with the fender liner but if they did it was minimal effort). I do have yet to run through my favorite bump that caused all this- but even still now that I know it's not actively hurting anything I think I'll just slow down a hair more when going over it on these wheels.

So TL;DR, it's just a "is what it is" situation that I'll just have to live with. With some input from a couple pros to I can live with that. Just chalk this up to the first known case to experience rubbing with the "god spec" configuration on 275 200TW tires, on the DE5 platform (which may have slightly less clearance than the FL5).

Oh and here, an angle I didn't post earlier bc you asked for more pics. Just pretend it's a civic:

 

[nycxandy]

Sure, I get that but figured I'd try to at least close the loop. Just suffice to say this is the first (documented) data point of rubbing with this spec. It may or may not be relevant to most folks in this thread, but it is worth mentioning- and I hereby throw down the gauntlet for someone to step up and slap a set of 275 RE-71RZ on an FL5 to prove/disprove if it fits w/no rub or not.

Copy/paste from the update I posted on integraforums bc I'm lazy:



Oh and here, an angle I didn't post earlier bc you asked for more pics. Just pretend it's a civic:

Check out @phothrottle's latest video. It goes into 18x10 +40 rubbing on an ITS.

 

[optronix]

Check out @phothrottle's latest video. It goes into 18x10 +40 rubbing on an ITS.

There you have it. Timely vid. These are the RS, I think the RZ are even wider. I still want to hear testimonials from even FL5 owners that have tried this combo with the RZ.

That said, with my current camber it isn't bad. Just the worst of the worst bumps. I'm not taking a die-grinder to it, I'm guessing I'll get the same effect over time from the tires themselves.

In any case. I'm stuck with them, because they are FAST. Coming from the RT660+ there is an instantaneously noticeable difference.

 

[ralden93]

Most would say no. Without pulling the alignment pins, you should be at or under 2* of camber...which is within stock spec on an FL5.

Unless you're running a large/wide tire brand you shouldn't be rubbing. I ran a 275/35/18 Nitto 555 G2 on Sportline springs and didn't rub at all at 2* of camber all around.

@rondre3000 bro have you tried tracking the car with this set up? I have the same camber and looking for the widest tire/wheel combo I can fit for track use

 

[ralden93]

ZE40 18x10 +40
Michelin PSAS4 275/35/18
Swift Springs, Alignment Pins Pulled

1.7-2 degrees of camber all around. No rub, a little poke in the front but no rub on hard driving.

@VinhVuPham have you tracked the car with this set up?

 

[CafeApex]

Having finally ordered a set of God Spec ZE40s, what is the current consensus for best tire size for daily/street use?

 

[dagulski]

CE28n-plus M-specBronze Almite (OG Bronze)

275/35/18 Falken FK510
Lowered on swift springs - no rub / modifications

How do you like swift springs?

 

[APEXRaceParts]

Having finally ordered a set of God Spec ZE40s, what is the current consensus for best tire size for daily/street use?

275/35-18 is usually the way to go!

 

[scottjua]

I have a question for those with 19 x10 +40… I see in most pics, the front wheel sticks out from the fender.… poking out literally outside of the fender.

I want to stick with 19”… but the extra width over 9.5” and the offset how will this NOT rub?

 

[Nothing]

I have a question for those with 19 x10 +40… I see in most pics, the front wheel sticks out from the fender.… poking out literally outside of the fender.

I want to stick with 19”… but the extra width over 9.5” and the offset how will this NOT rub?

The x10 is a little tricky to think of, but compared to x9.5 there really isn't much difference except how the tire stretches on the wheel. The big factors are tire section width (e.g. 265, 275, etc) and offset (+40, +38, +60).

275 +38 fits with ~2* of camber. If you have a drop you might be around this, you might need to pull pins. You might want a little extra clearance with ball joints or camber plates, but most people are saying no camber adjustment or pulling the pins is enough. However, different mfr and models of tires interpret section width differently, so a 265 PS4S may be effectively a different width than DWS06 when you're trying to not rub.

If you want to think about x10 vs x9.5, it's 1/2" wider just on the rim, and since it grows outwards from center it's 1/4" wider on the fender side, or about 6mm. It could mean the difference between not rubbing but visually a little more poke or flush. Since +38 means the whole wheel is out 2mm more than +40, x10 +40 is only 4mm out more than x9.5 +38. And that's only at the wheel lip.

Where wheel width counts is if you're super dumped on bags and your rim is near the fender or you run super wide rims (stance, hellaflush), and on the inside you could contact the strut. There's not many people here doing that.

What I find helpful is looking at people's wheel/tire specs, drop, and advertised camber and how it looks, then use willtheyfit.com to numerically compare wheel/tire combos. Always keep in mind, camber is slightly different for every car, tire model matters, and everybody's opinion on rubs/works is different. Fortunately there seems to be a strong consensus for x9.5 +38 and x10 +40.

 

[CafeApex]

275/35-18 is usually the way to go!

I ordered 275/35 Advan Apex tires to try out first.

 

[optronix]

A quick update with my 275 Bridgestone RE-71RZ- after a couple months and 4 total autocross events, I can honestly say the tires no longer rub. Whatever minimal amount they were rubbing has been worn down- and I looked in the fender well and it was a matter of millimeters. There are no gashes or holes in the inner fenders, just a bit of polish honestly (also the tires had a few scuff marks as well). I was way more stressed out about it than I should have been in retrospect- and I'm almost positive that virtually no other tires would exhibit this behavior at all.

That said... l do have quite a bit of extra camber. But overall whatever crisis I felt like I was going through with the rubbing has been averted.