R34 Gtt Wheel Offset Advice

[shortyboy]

Hi, new to the forum. Just got a '98 R34 GTT Sedan. Looking to swap out wheels. Is anyone running hub adapters? Looking to fit a set of work meister s1 3p, 18x8.5x10.5 +49. Tires are slightly stretched. Bolt pattern is 5x130 ( they were on my Porsche 944 turbo ). If I get 19mm adapters that go from 5x114 to 5x130 that should give me 20mm offset, correct? My only worry here is if the stock hub studs would be too long, hitting the back of the rim, popping out of the hub adapters. Does anyone know the length the stock hub studs stick out from rotors? Just trying to see if I can make this work. Thanks in advance.

[GTSBoy]

1 hour ago, shortyboy said:

My only worry here is if the stock hub studs would be too long, hitting the back of the rim, popping out of the hub adapters.

I don't think that that's your only worry.

First up, it's not a problem in itself. If it happens, you just put shorter studs into the original hubs.

Secondly....to try to fit a 10.5" wheel on the back of an R34 is an exercise in getting the offset absolutely perfect. You'd want to be damn sure (measure it yourself 20 times) before committing. Because you don't have the option to do anything except just throw that wheel onto the (probably only choice of) hub adapter, you only have one outcome. Either it fits or it fouls and you probably can't do anything about it if it fouls (beyond guard mods, perhaps coilovers, whatever it takes to find the required space).

[GoHashiriya]

On 12/5/2023 at 5:23 AM, shortyboy said:

Hi, new to the forum. Just got a '98 R34 GTT Sedan. Looking to swap out wheels. Is anyone running hub adapters? Looking to fit a set of work meister s1 3p, 18x8.5x10.5 +49. Tires are slightly stretched. Bolt pattern is 5x130 ( they were on my Porsche 944 turbo ). If I get 19mm adapters that go from 5x114 to 5x130 that should give me 20mm offset, correct? My only worry here is if the stock hub studs would be too long, hitting the back of the rim, popping out of the hub adapters. Does anyone know the length the stock hub studs stick out from rotors? Just trying to see if I can make this work. Thanks in advance.

I'm running 18x10 +20mm rear on an R34 2 door GTT and it's too wide. It works, just, with 265/23 tyres and rolled fenders. But it would be about perfect at +25mm offset. If I were buying the wheels again - bought originally for my 350z - I would opt for 9.5 rear then f*ck around with a 5mm spacer if necessary. 

Edit: I should add that the coupe has about +10mm body width at the rear fenders.

Edited December 11, 2023 by GoHashiriya

[GoHashiriya]

265/35*** lol

[myktek]

Need some advice myself.

These are my wheel options

19x8.5 +35

19x8.5 +43

19x9.5A +25

19x9.5A +35

19x10B +25

19x11B +18

 

I'm thinking 19x8.5 35 front and 19x9.5 35 rear
Not many people running 19's, I've mostly seen 18's.  But staying between 30 - 35 offset seems to be the consensus

I'm wondering if I could do 9.5 +25 or 10 +25 in the rear.  

I'm looking for flush, not slamming the car or any camber.

I guess its hard for me to visualize not knowing where the fender is.

 

 

[GTSBoy]

What car? Do you not have it in possession?

The reasons I ask are:

• Obviously it differs between the different models as to what will fit, including choices like strut/coilover choice,
• It makes no sense to be buying wheels for a car that is not in possession. When you have it in possession, you can actually measure what is on there and how much clearance you have. Then the answers just fall from the sky.

[myktek]

forgot to mention, R34 GTT Sedan

The car is not with me at the moment, in the shop getting some maintenance work.  I just got it a few weeks ago

[GTSBoy]

Yes, so then my advice is as I have given in the past. Don't rush it. You don't have to let the excitement make you make bad decisions. You don't have to have the nicest wheels immediately. You can wait a few extra weeks. Get hold of it and measure it yourself.

It is important to realise that the subframe might not be evenly set left-right across the car and you could easily have a 10mm difference left to right. And if you're trying to do this from internet measurements and pushing it to the last mm, you will possibly find yourself with it rubbing on the inside on one side of the car, and on the outside on the other. The only way to win in those circumstances is to go with a more conservative wheel choice, because, while you can put a 5mm spacer on one side, there is no such thing as an "unspacer"** for the other side.

**even if I did manage to convince some numpty that they existed abut 20 years ago.

[GoHashiriya]

5 hours ago, myktek said:

forgot to mention, R34 GTT Sedan

The car is not with me at the moment, in the shop getting some maintenance work.  I just got it a few weeks ago

I agree with GTSBoy on this, but I will say that 19x10 +25mm will be a stretch on an R34 sedan body. Out of your options, I'd wager the 19x9.5 +25mm as being the closest to perfect (flush), but I'm not considering the implications a 19" wheel will bring over an 18". When you get real close to making it perfect, your alignment settings will have an impact too; I rubbed very slightly on hard corners/rumble strips at -2.5 rear and not at all when set at -3.0.

 

[shortyboy]

On 12/4/2023 at 12:14 PM, GTSBoy said:

I don't think that that's your only worry.

First up, it's not a problem in itself. If it happens, you just put shorter studs into the original hubs.

Secondly....to try to fit a 10.5" wheel on the back of an R34 is an exercise in getting the offset absolutely perfect. You'd want to be damn sure (measure it yourself 20 times) before committing. Because you don't have the option to do anything except just throw that wheel onto the (probably only choice of) hub adapter, you only have one outcome. Either it fits or it fouls and you probably can't do anything about it if it fouls (beyond guard mods, perhaps coilovers, whatever it takes to find the required space).

 

Just trying to make wheels I already have work. If I cant get the rears to fit properly, Im looking to get Okubo Factory rear fender flares. The adapters have been ordered from Caold in Australia. So itll take a bit to get to me in Hawaii.

On 12/10/2023 at 6:26 PM, GoHashiriya said:

I'm running 18x10 +20mm rear on an R34 2 door GTT and it's too wide. It works, just, with 265/23 tyres and rolled fenders. But it would be about perfect at +25mm offset. If I were buying the wheels again - bought originally for my 350z - I would opt for 9.5 rear then f*ck around with a 5mm spacer if necessary. 

Edit: I should add that the coupe has about +10mm body width at the rear fenders.

Thanks for the specs and pic. So my 10.5x18 at +20mm definitely wont fit. Lol. Lucky I ordered a pair of 15mm and 20mm adapters. Ill keep this post updated Once I get them.

[shortyboy]

Adapters came in. Got them from Caold Technology in Australia. 20mm in the front and 15mm in the rear. Front looks like it could take another 5mm. Work Mesiter S1 3P 18x9.5 and 18x10.5 +49. Coilovers are Blitz, may go lower a bit but the exhaust is already scraping alot of driveways. 😂 

[myktek]

Konig Heliograms

19x8.5 ET32 225/40/19

19x9.5 ET35 265/35/19

On Tein coilovers, no rubbing  

[GoHashiriya]

On 1/8/2024 at 4:50 PM, shortyboy said:

Adapters came in. Got them from Caold Technology in Australia. 20mm in the front and 15mm in the rear. Front looks like it could take another 5mm. Work Mesiter S1 3P 18x9.5 and 18x10.5 +49. Coilovers are Blitz, may go lower a bit but the exhaust is already scraping alot of driveways. 😂 

You're right, the front needs about another 5mm and a size wider on the tires. Rear needs to lose about 10mm in offset.

The wheels work well with the car though, I would just see if there's any machining that can be done with the adaptor and original studs. Studs are easy to replace so you shouldn't be too frightened about shortening them. Just buy some spares first. Of course it's your car, not mine, so do what you want.

[GoHashiriya]

On 1/9/2024 at 2:26 PM, myktek said:

Konig Heliograms

19x8.5 ET32 225/40/19

19x9.5 ET35 265/35/19

On Tein coilovers, no rubbing  

Fitment is nice and overall it looks good, albeit 19s are too big for me - I've been tempted to go with 17s. Did you roll the fenders and is there any rubbing up front at lock?

[myktek]

7 hours ago, GoHashiriya said:

Fitment is nice and overall it looks good, albeit 19s are too big for me - I've been tempted to go with 17s. Did you roll the fenders and is there any rubbing up front at lock?

I initially rubbed only on the driver front because of my fat ass, lol, so just adjusted the coilovers to support my 220 lbs of weight lol.

Didn't need to roll fenders or camber.