Will 305/30/19's Fit a LT-1?

JBinSD · 07-12-2023, 03:55 PM

Found some Apex/Sumitomo wheels. Will these fit without spacers or rub? (other thread asked, but I didn't get a clear response. the 305 upfront is my biggest concern.)

TIA,
Joel

JBinSD · 07-12-2023, 04:18 PM

Disregard/delete. I just spoke to Apex (nice guys); they said without messing with the camber, the 305's up front will stick out over 1" and likely rub.

Back to shopping, lol.

Msquared · 07-14-2023, 07:20 PM

Well...305/30/19s will easily fit up front without poke if you get the offset correct. You need to replicate the 1LE offset of 20mm. 23mm will work too, especially since you don't have magride. I have autocrossed on this size a lot with 19x10 and so have almost every 1LE owner. Needless to say, they will fit in back too with proper offset.

Camaro Fanatic · 07-17-2023, 12:29 PM

What tires do you run to be able to comfortably fit 305's on 10in rims?
I thought 10.5in was the smallest you could go for 305's without pinching.

Been looking at square 305 setup to track without extended lugs.

JBinSD · 07-17-2023, 03:24 PM

The wheels I found were 11" squared; I think that was the problem, they wouldn't fit up front.

Msquared · 07-17-2023, 10:52 PM

Quote:

Originally Posted by Camaro Fanatic

What tires do you run to be able to comfortably fit 305's on 10in rims?
I thought 10.5in was the smallest you could go for 305's without pinching.

Been looking at square 305 setup to track without extended lugs.

I would prefer to run 19x11 up front with 305s, but unfortunately the autocross class I run in requires stock rim width. Ergo, I'm stuck with 19x10 and any one of several 305/30/19 tires in UTQG 200 rating. Last set was Falken RT660s, running the 305s up front and 315s in back on 19x11 wheels. It's not ideal, but it works.

Quote:

Originally Posted by JBinSD

The wheels I found were 11" squared; I think that was the problem, they wouldn't fit up front.

You can run 19x11 wheels up front. You have to get the offsets just right. A local friend is doing it with a net 15mm offset on his SS (35mm offset and 20mm spacers). They fit just fine, and he even has MRC dampers.

JBinSD · 07-18-2023, 11:13 AM

Understood. Seller on the 19x11's didn't know the offsets, so they were likely squared. Staggered is probably the easiest for me at this point since I won't track much, if at all.

07-12-2023, 03:55 PM	#1
JBinSD Drives: '23 LT Vert M6'16 Hyper 2SS Vert MT Join Date: Sep 2016 Location: Carlsbad, San Diego, CA Posts: 583	Will 305/30/19's Fit a LT-1? Found some Apex/Sumitomo wheels. Will these fit without spacers or rub? (other thread asked, but I didn't get a clear response. the 305 upfront is my biggest concern.) TIA, Joel

07-14-2023, 07:20 PM	#3
Msquared Drives: Chevrolet SS 1LE Join Date: Oct 2019 Location: St. Charles, MO Posts: 1,446	Well...305/30/19s will easily fit up front without poke if you get the offset correct. You need to replicate the 1LE offset of 20mm. 23mm will work too, especially since you don't have magride. I have autocrossed on this size a lot with 19x10 and so have almost every 1LE owner. Needless to say, they will fit in back too with proper offset. __________________ Matt Miller 2020 SS 1LE

07-12-2023, 04:18 PM	#2
JBinSD Drives: '23 LT Vert M6'16 Hyper 2SS Vert MT Join Date: Sep 2016 Location: Carlsbad, San Diego, CA Posts: 583	Disregard/delete. I just spoke to Apex (nice guys); they said without messing with the camber, the 305's up front will stick out over 1" and likely rub. Back to shopping, lol.

07-17-2023, 12:29 PM	#4
Camaro Fanatic Drives: '23 1SS 1LE Join Date: Jul 2019 Location: SE Michigan Posts: 66	What tires do you run to be able to comfortably fit 305's on 10in rims? I thought 10.5in was the smallest you could go for 305's without pinching. Been looking at square 305 setup to track without extended lugs.

07-17-2023, 03:24 PM	#5
JBinSD Drives: '23 LT Vert M6'16 Hyper 2SS Vert MT Join Date: Sep 2016 Location: Carlsbad, San Diego, CA Posts: 583	The wheels I found were 11" squared; I think that was the problem, they wouldn't fit up front.

07-18-2023, 11:13 AM	#7
JBinSD Drives: '23 LT Vert M6'16 Hyper 2SS Vert MT Join Date: Sep 2016 Location: Carlsbad, San Diego, CA Posts: 583	Understood. Seller on the 19x11's didn't know the offsets, so they were likely squared. Staggered is probably the easiest for me at this point since I won't track much, if at all.

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