Who's making the move to STU?

ConekillerZ34 · 01-02-2021, 06:00 PM

Quote:

Originally Posted by Evildky

I like the gearing offered by the 19 tire sizes. To run the 18’s I lose 3 mph in 2nd which would seldom be an issue at autocross. But I loose 6 mph in 4th which is a big problem for me at two spots on my local track (ncm). I don’t want to ha e to do a bound up dogleg down shift creating turn 16, which is off camber decreasing radius with an entry of 120+ Mph. It’s also not like there are a lot more wheel options in 18. The goofy offset up front makes for very few options. One of the great things about the 350 was 18x10.5 on stock suspension, cheap light available.

What's goofy about the offsets? I slapped on the same set of 18x10.5s from my Z33 after I switched cars. One and done! Got 4 lovely pandemic events in time to need something else 🤣

Evildky · 01-04-2021, 05:09 PM

Quote:

Originally Posted by ConekillerZ34

What's goofy about the offsets? I slapped on the same set of 18x10.5s from my Z33 after I switched cars. One and done! Got 4 lovely pandemic events in time to need something else 🤣

The OE wheels on my nismo are 19x9.5 +40, the rears are 19x10.5 +23. As opposed to my 350Z (GT) 18x9 +30 and 19x10 +30. I ran my 18x10+23's up front on the 370, they fit due to the smaller diameter of the tire but stuck out from the body a bit. My 10.5 +15's would have been worse up front but fit pretty well out back.

ConekillerZ34 · 01-06-2021, 11:18 AM

Quote:

Originally Posted by Evildky

The OE wheels on my nismo are 19x9.5 +40, the rears are 19x10.5 +23. As opposed to my 350Z (GT) 18x9 +30 and 19x10 +30. I ran my 18x10+23's up front on the 370, they fit due to the smaller diameter of the tire but stuck out from the body a bit. My 10.5 +15's would have been worse up front but fit pretty well out back.

To each their own I suppose! I've always run 18x10.5 +15 square and I couldn't recommend it more for the sake of ease. The 315 rule is probably going to bring a change to 11s at some point, obviously, but still.

Evildky · 01-06-2021, 12:07 PM

Quote:

Originally Posted by ConekillerZ34

To each their own I suppose! I've always run 18x10.5 +15 square and I couldn't recommend it more for the sake of ease. The 315 rule is probably going to bring a change to 11s at some point, obviously, but still.

I'm not finding many choices in the 11" width in either diameter.

Hotrodz · 01-06-2021, 01:03 PM

Quote:

Originally Posted by Evildky

I'm not finding many choices in the 11" width in either diameter.

You are going to have to go custom if you want wheels in 19x11. Volk, Enkie, Konig and Wedssport all make 18x11 in a size that will fit a Z.

Rusty · 01-06-2021, 02:21 PM

Quote:

Originally Posted by Hotrodz

You are going to have to go custom if you want wheels in 19x11. ForgeLine, Volk, Enkie, Konig and Wedssport all make 18x11 in a size that will fit a Z.

fify

Brendan · 01-23-2021, 09:39 AM

It's pretty easy to run 18x10.5 or 11 up front but I'm not sure what you mean by goofy offsets. If you are on stock suspension you will get some poke. Once you lower the car and add the appropriate amount of negative camber you shouldn't have any fit issues. I run a +24 up front with room to go to maybe a +18 comfortably. A stock offset wheel actually might have inner clearance issues when you add camber.

Wigjiggy · 01-23-2021, 04:47 PM

Quote:

Originally Posted by Brendan

It's pretty easy to run 18x10.5 or 11 up front but I'm not sure what you mean by goofy offsets. If you are on stock suspension you will get some poke. Once you lower the car and add the appropriate amount of negative camber you shouldn't have any fit issues. I run a +24 up front with room to go to maybe a +18 comfortably. A stock offset wheel actually might have inner clearance issues when you add camber.

I run Enkei NT03-M 18x10.5 +30mm offset square. With 5mm spacers in rear and 20mm in front. Plenty of room and you can comfortably fit 295-30s on them. They do protrude out past the fender in the front and I’ll be installing splats soon to help that. They fit nicely with OEM Sport calipers and to my delight fit over my new Stoptech Trophy Rs. And they are affordable you can get a rain set and also replace them when you bend them (I’ve destroyed three already in off-track adventures).

Brendan · 01-23-2021, 10:02 PM

Quote:

Originally Posted by Wigjiggy

I run Enkei NT03-M 18x10.5 +30mm offset square. With 5mm spacers in rear and 20mm in front. Plenty of room and you can comfortably fit 295-30s on them. They do protrude out past the fender in the front and I’ll be installing splats soon to help that. They fit nicely with OEM Sport calipers and to my delight fit over my new Stoptech Trophy Rs. And they are affordable you can get a rain set and also replace them when you bend them (I’ve destroyed three already in off-track adventures).

Unfortunately one of the rules of stu is that the top of tire can't protrude past the fender so no f1 fitments.

Zewerr · 02-07-2021, 02:20 AM

So, I'm trying to decide on a good 18x11 option. The waaaay cheaper option, but still a good quality lightweight wheel is the Konig Hypergram, but I'm worried about a +15 offset. Many of you here are saying this should be fine, but math shows that these will stick out 14 mm further than my 19x10.5 +23 that I'm coming from which fit perfectly flush on the front with -3.2 degrees of camber. It would seem that running around a +25 would be best. Wheels available there would essentially double or triple the price over the Konigs, though. Anyone have good picts of 11's at around a +15?

Hotrodz · 02-07-2021, 10:45 AM

Quote:

Originally Posted by Zewerr

So, I'm trying to decide on a good 18x11 option. The waaaay cheaper option, but still a good quality lightweight wheel is the Konig Hypergram, but I'm worried about a +15 offset. Many of you here are saying this should be fine, but math shows that these will stick out 14 mm further than my 19x10.5 +23 that I'm coming from which fit perfectly flush on the front with -3.2 degrees of camber. It would seem that running around a +25 would be best. Wheels available there would essentially double or triple the price over the Konigs, though. Anyone have good picts of 11's at around a +15?

There may not be enough back spacing to run a +22. I run +18 and it is really close.

Sent from my SM-G965U using Tapatalk

Wigjiggy · 02-07-2021, 05:06 PM

Quote:

Originally Posted by Zewerr

So, I'm trying to decide on a good 18x11 option. The waaaay cheaper option, but still a good quality lightweight wheel is the Konig Hypergram, but I'm worried about a +15 offset. Many of you here are saying this should be fine, but math shows that these will stick out 14 mm further than my 19x10.5 +23 that I'm coming from which fit perfectly flush on the front with -3.2 degrees of camber. It would seem that running around a +25 would be best. Wheels available there would essentially double or triple the price over the Konigs, though. Anyone have good picts of 11's at around a +15?

Don’t know if this is helpful. But this is a pic showing flush at the top with -3% camber. Theses are:
Enkei NT03-M 18x10.5 +30mm offset (relatively cheap)
With 295/30/18 Toyo RR‘s
And 5mm spacer

Zewerr · 02-07-2021, 08:24 PM

Quote:

Originally Posted by Hotrodz

There may not be enough back spacing to run a +22. I run +18 and it is really close.

Sent from my SM-G965U using Tapatalk

Is it the steering knuckle I have to worry about? Currently, I have about 3/4" of clearance, I'm estimating. Going down an inch in diameter will move the wheel slightly closer to the knuckle. I'm guessing it'll give me another 1/2" to work with. Total guesses, though, without actually measuring.

ConekillerZ34 · 02-18-2021, 12:05 AM

I think I'll be taking a bit of a plunge on behalf of the current thread topic. Looks like I'll be picking up a set of 18x11 square Forgestar F14s (or Gramlight 57T, haven't decided yet).

Probably going with a 18x11 +25 all the way around, with a few different sets of spacers to give me options. Per the math, I need +21 to match my current fitment and would expect that to give me about 7.5mm clearance inside at the narrowest point to the arm, depending on how the 315 tire itself sits out from the lip. That's based on a rough measurement, so I'm trying not to get down to the millimeter on the inside.

I figure if a spacer is necessary, with a 5mm spacer I'll be only millimeter off of my current setup in the front, and even with the extra tire meet it won't be looking like a formula car. If I have to run even more spacer, well I'm already rocking #44 so maybe it'll just be another silver Mercedes.

On the rear it's obviously not as much of a concern, and 10-15mm of spacer will probably get the aesthetics handled.

Fingers crossed. I've been talking to Brendan, but if anyone else has measurements that make me crazy, speak now or forever hold your peace.

Zewerr · 02-21-2021, 01:19 AM

Good luck, man. I was planning on popping a front wheel off tomorrow and throwing one of my new 315s under there with a rather cheap *** fitment jig I borrowed. I'm hoping it'll at least get me close.

01-23-2021, 09:39 AM	#292 (permalink)
Brendan Track Member Join Date: Apr 2013 Location: Colorado Posts: 640 Drives: Poor man's Porsche Rep Power: 542	It's pretty easy to run 18x10.5 or 11 up front but I'm not sure what you mean by goofy offsets. If you are on stock suspension you will get some poke. Once you lower the car and add the appropriate amount of negative camber you shouldn't have any fit issues. I run a +24 up front with room to go to maybe a +18 comfortably. A stock offset wheel actually might have inner clearance issues when you add camber. Hotrodz likes this. Last edited by Brendan; 03-11-2021 at 06:03 PM.

02-18-2021, 12:05 AM	#299 (permalink)
ConekillerZ34 Base Member Join Date: Jan 2020 Location: DC Posts: 26 Drives: 2016 370Z Nismo Tech Rep Power: 9	I think I'll be taking a bit of a plunge on behalf of the current thread topic. Looks like I'll be picking up a set of 18x11 square Forgestar F14s (or Gramlight 57T, haven't decided yet). Probably going with a 18x11 +25 all the way around, with a few different sets of spacers to give me options. Per the math, I need +21 to match my current fitment and would expect that to give me about 7.5mm clearance inside at the narrowest point to the arm, depending on how the 315 tire itself sits out from the lip. That's based on a rough measurement, so I'm trying not to get down to the millimeter on the inside. I figure if a spacer is necessary, with a 5mm spacer I'll be only millimeter off of my current setup in the front, and even with the extra tire meet it won't be looking like a formula car. If I have to run even more spacer, well I'm already rocking #44 so maybe it'll just be another silver Mercedes. On the rear it's obviously not as much of a concern, and 10-15mm of spacer will probably get the aesthetics handled. Fingers crossed. I've been talking to Brendan, but if anyone else has measurements that make me crazy, speak now or forever hold your peace. Zewerr likes this. __________________ 2016 Nismo 370Z \| SCCA STU Autocross Build WIP 2015 GT-R Black Edition \| Sold 2006 350Z SCCA STU prepped \| Sold

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02-07-2021, 02:20 AM	#295 (permalink)
Zewerr Base Member Join Date: Jan 2019 Location: Tacoma, WA Posts: 45 Drives: 11 370Z 82/182 STU Rep Power: 6	So, I'm trying to decide on a good 18x11 option. The waaaay cheaper option, but still a good quality lightweight wheel is the Konig Hypergram, but I'm worried about a +15 offset. Many of you here are saying this should be fine, but math shows that these will stick out 14 mm further than my 19x10.5 +23 that I'm coming from which fit perfectly flush on the front with -3.2 degrees of camber. It would seem that running around a +25 would be best. Wheels available there would essentially double or triple the price over the Konigs, though. Anyone have good picts of 11's at around a +15?

02-21-2021, 01:19 AM	#300 (permalink)
Zewerr Base Member Join Date: Jan 2019 Location: Tacoma, WA Posts: 45 Drives: 11 370Z 82/182 STU Rep Power: 6	Good luck, man. I was planning on popping a front wheel off tomorrow and throwing one of my new 315s under there with a rather cheap *** fitment jig I borrowed. I'm hoping it'll at least get me close.