Enkei RPF1 15x7 ET41 or ET35?

[Ardent]

@miko

Just as a reference point. The stock wheel nut torque is 103nm.

Flat vs tapered =IDK
But here for your info.

[Alex Knight]

Alex Knight.
That's brilliant info.
Hmm now really thinking about to go for ET35.
Just a quick question. Are you using extended wheel studs?

Nope, stock studs. Zero issues.

You'll be fine.

[miko]

@ Alex Knight

Thank you Alex 👍

[moca2cv]

Very late to the party here.

I have ARP studs. They're too long. Very easy to swap over though. You'll need LONG nuts for the socket to get enough grip on the nut. I swapped because the OE studs were too short for my needs. They were JUST long enough (maybe, the wheels stayed on just fine though, through many track days and gymkhana events), but add a spacer and you quickly run out of threads.

As for offsets... Rears don't matter. You can fit 15x8 ET0 with enough camber if you want. For track I run 15x8 et35 on the back, with -2.8 deg camber, and fitment is great.
On the front, for regular stuff I run a 15x7 et35 and it looks fine, and drives great. For tracky stuff I run a 13mm spacer to allow my track wheels to clear the Prius calipers, these are 15x7 et38 so effectively et25 with the spacer. Fitment is perfect with -2.8 deg camber, and with maxed out caster (top struts rotated and camber adjustment maxed) I get some rubbing on what's left of the arch liners, but I don't know if that would be the case if the liners weren't in 18 parts. A little extra scrub radius is no drama and I actually prefer this for gymkhana and AutoSolo over stock, but even with the spacer it's a 10% change tops. Nothing too material.

TL;DR, get the lower offset, it'll look better and make next to no difference. Your studs will probably be fine.