Clueless on tire/wheel fitment options for 2020 LT1 ( 20" wheels w/ 245's run flats )

CodeRev · 06-24-2020, 08:43 PM

Just join the Camaro crew in April. I purchased an 2020 LT1. Of course you all know, it comes with stock 20" wheels w/ 245 run-flats. I do not mind the run-flats now. But, I want to start saving for bigger wheels and/or tires.

My questions are:

- What fitment options do I have currently without needing modifications?

- The stock tires are 245's I believe. Can I go with a larger size now?

- If I go with 305's, I heard there is a wiring harness issue in the rear, you must take care of first. Is this true with the 2020's?

Much appreciated!

VinnAY · 06-25-2020, 06:47 AM

2020 LT1 tells us nothing about the diameter and width of the wheels that you have. The range of tires sizes is based on that. On the width of a wheel you can really go up ~two sizes, safely. 245 > 255 > 265. Wheel widths specify tire width's that are appropriate or "safe".

If you have a wheel with a 245 on it you cannot put a 305 on it.

CodeRev · 06-25-2020, 07:02 AM

Thank you for the information. My fault for being vague.

20" wheels w/ 245's square set-up All-season run flats, is what I have currently.

VinnAY · 06-25-2020, 07:28 AM

Typical size situation a 245 tire mounts to a 9.5" wheel, I would assume that that's what you've got for an OE setup. With a 9.5" wide wheel you can go up to 255 or 265, 275 would be the max recommended tire width for that wheel.

https://www.tyresizecalculator.com/c...rim-size-chart

06-24-2020, 08:43 PM	#1
CodeRev Drives: 2020 Camaro LT1 ( A10 + NPP ) Join Date: Jun 2020 Location: TX Posts: 6	Clueless on tire/wheel fitment options for 2020 LT1 ( 20" wheels w/ 245's run flats ) Just join the Camaro crew in April. I purchased an 2020 LT1. Of course you all know, it comes with stock 20" wheels w/ 245 run-flats. I do not mind the run-flats now. But, I want to start saving for bigger wheels and/or tires. My questions are: - What fitment options do I have currently without needing modifications? - The stock tires are 245's I believe. Can I go with a larger size now? - If I go with 305's, I heard there is a wiring harness issue in the rear, you must take care of first. Is this true with the 2020's? Much appreciated! Last edited by CodeRev; 06-25-2020 at 07:04 AM.

06-25-2020, 06:47 AM	#2
VinnAY Account Suspended Drives: 18 1SS/1LE Join Date: Jun 2018 Location: Missouri Posts: 939	2020 LT1 tells us nothing about the diameter and width of the wheels that you have. The range of tires sizes is based on that. On the width of a wheel you can really go up ~two sizes, safely. 245 > 255 > 265. Wheel widths specify tire width's that are appropriate or "safe". If you have a wheel with a 245 on it you cannot put a 305 on it.

06-25-2020, 07:02 AM	#3
CodeRev Drives: 2020 Camaro LT1 ( A10 + NPP ) Join Date: Jun 2020 Location: TX Posts: 6	Thank you for the information. My fault for being vague. 20" wheels w/ 245's square set-up All-season run flats, is what I have currently.

06-25-2020, 07:28 AM	#4
VinnAY Account Suspended Drives: 18 1SS/1LE Join Date: Jun 2018 Location: Missouri Posts: 939	Typical size situation a 245 tire mounts to a 9.5" wheel, I would assume that that's what you've got for an OE setup. With a 9.5" wide wheel you can go up to 255 or 265, 275 would be the max recommended tire width for that wheel. https://www.tyresizecalculator.com/c...rim-size-chart

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