questions about 2023 GR86 wheel and tire fitment

[valxgr86]

I've never made tire mods on my 2023 GR86 but I feel it's about time! I'm trying to get a handle on wheel and tire fitment and I can really use some help. Forgive my post for the many questions!

If I'm looking at two 17x7.5" wheels, where one is the stock ET48 and the other is ET35, and I'm not using spacers, would the GR86's stock wheel studs be enough, or would I need longer ones? Does the need for longer studs generally depend on the car model itself?

My understanding is that spacers can only push the wheel out. Is that correct? I can use a spacer to make an ET48 wheel effectively an ET35, but I can't easily make an ET35 wheel sit further in?

If I'm upgrading to 17x8" ET35, should I install ARP 2.5" or 3" studs? Would using 3" studs give me more flexibility for adding spacers or future setups. Are there any downsides to the 3" studs besides just how they look or a tougher install?

I'd appreciate insights and advice!

 

[NYPizzaPie]

Does the need for longer studs generally depend on the car model itself?

With ET35 on 17x7.5", stock studs are usually fine unless you're adding thick spacers later. Stud length mostly depends on how much thread engagement you need with the wheel/spacer combo

 

[Big Smurf]

You've got it mostly right, the spacers push wheels out, but you can't really move them inward without new wheels. Stock studs should be fine without spacers, but if you're planning ahead, 3" ARPs offer more flexibility, especially if you might run spacers later. For the downside? well, trickier install, and they'll poke out more if you're not using open lugs. What tire size are you pairing with the 17x8 ET35?

 

[BabyDiver]

When I first upgraded my wheels, I thought I'd play it safe and get extended lugs even without spacers, it was a total overkill. It made installation more annoying and didn't add any real benefit. Unless you're running spacers, longer studs just make things harder for no good reason.

 

[dumpl!ng_]

If I'm looking at two 17x7.5" wheels, where one is the stock ET48 and the other is ET35, and I'm not using spacers, would the GR86's stock wheel studs be enough, or would I need longer ones? Does the need for longer studs generally depend on the car model itself?

bro, you don't need longer studs just because the offset changes. The offset (ET) simply moves the wheel's mounting surface relative to its centerline, it doesn't change the thickness of the wheel's mounting plate where it contacts the hub.
You only need longer studs if you're adding a spacer that's so thick the lug nuts can no longer get full thread engagement on the stock studs