18" Wheels - REG RPO Code

KeithO · 06-28-2019, 02:22 PM

Does anyone know the width and offset of these wheels?

Our administrative assistant at work has a 2018 1LT Convertible but bought different sized wheels that she has on the car. The dealer required her to take the REG RPO wheels and she is looking to sell.

But she doesn't know the width and offset of these wheels.

Thanks in advance.

Buzzmanb12 · 06-28-2019, 02:49 PM

It is normally stamped on the inner face of the wheel, take one off or lift the car and check it.
It'll look like: 18x8JJ or similar.

KeithO · 07-14-2019, 03:24 PM

The 2018 REG RPO Wheels are:
Front wheels: 18” x 8” wide, 32mm offset
Rear wheels: 18” x 9.5” wide, 35mm offset

My 2017 1SS 1LE Wheels are:
Front wheels: 20” x 10” wide, 20mm offset
Rear wheels: 20” x 11” wide, 40mm offset

Front and rear, the amount of wheel between the mounting face and the wheel inner lip is less on the 2018 1LT wheels so I know I would not have clearance problems putting the 2018 1LT wheels on my 2017 1SS 1LE on the inside of the wheel wells.

According to my math, the distance between the street side of the wheel and the wheel mounting face are as follows:

2017 1SS 1LE:
Front: 107 mm
Rear: 87mm

2018 1LT Convertible:
Front: 69.6mm
Rear: 85.65mm

How the heck can I figure out if the '18 1LT wheels will fit on my '17 1SS 1LE?

06-28-2019, 02:22 PM	#1
KeithO Drives: 01 Z28, 1990 NASCAR Busch North Car Join Date: Jul 2018 Location: Beaver, PA Posts: 36	18" Wheels - REG RPO Code Does anyone know the width and offset of these wheels? Our administrative assistant at work has a 2018 1LT Convertible but bought different sized wheels that she has on the car. The dealer required her to take the REG RPO wheels and she is looking to sell. But she doesn't know the width and offset of these wheels. Thanks in advance.

06-28-2019, 02:49 PM	#2
Buzzmanb12 Drives: '17 ZL1 Join Date: Jan 2018 Location: Bama Posts: 99	It is normally stamped on the inner face of the wheel, take one off or lift the car and check it. It'll look like: 18x8JJ or similar.

07-14-2019, 03:24 PM	#3
KeithO Drives: 01 Z28, 1990 NASCAR Busch North Car Join Date: Jul 2018 Location: Beaver, PA Posts: 36	The 2018 REG RPO Wheels are: Front wheels: 18” x 8” wide, 32mm offset Rear wheels: 18” x 9.5” wide, 35mm offset My 2017 1SS 1LE Wheels are: Front wheels: 20” x 10” wide, 20mm offset Rear wheels: 20” x 11” wide, 40mm offset Front and rear, the amount of wheel between the mounting face and the wheel inner lip is less on the 2018 1LT wheels so I know I would not have clearance problems putting the 2018 1LT wheels on my 2017 1SS 1LE on the inside of the wheel wells. According to my math, the distance between the street side of the wheel and the wheel mounting face are as follows: 2017 1SS 1LE: Front: 107 mm Rear: 87mm 2018 1LT Convertible: Front: 69.6mm Rear: 85.65mm How the heck can I figure out if the '18 1LT wheels will fit on my '17 1SS 1LE?

User Name		Remember Me?
Password