Wheel Offset Chart
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Le Mans Master
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Wheel Offset Chart
I was browsing the interweb just playing around looking for some new wheels and came across this offset chart on the Corvette Central web site. Looks like it would be a good reference for anyone that has any questions on what they would need if they're planning on some new ones. Looks like it works for the C4 thru the C7's.
Just thought I'd share since I haven't seen this posted before and see if anyone else has seen it. If it's a dup then sorry.
CORVETTE WHEEL SIZE & OFFSET CHART
Size Offset Application
17" × 8.5" +56 88-96 front/rear, 97-04 front
17" × 9.5" +54 88-96 front/rear, 97-04 front
17" × 11" +36 90-95 ZR1 rear
17" × 11" +50 96 Grand Sport rear
18" × 8.5" +56 88-96 front/rear, 97-13 front exc. C6 Z06, ZR1, Grand Sport, C7 front exc. Z51
18" × 9.5" +40 84-87 front/rear, 06-13 Z06 & Grand Sport front
18" × 9.5" +57 97-04 rear, 05-13 front
18" × 10.5" +58 97-04 rear
19" × 8.5" +56 C7 front w/ Z51
19" × 10" +40 06-13 C6 Z06, ZR1 & Grand Sport front, 427 Convertible front
19" × 10" +43 C7 Z06 or Grand Sport front
19" × 10" +56 97-04 rear
19" × 10" +79 05-13, C7 exc. Z51 rear
19" × 10.5" +42 C7 ZR1 front
19" × 11" +64 97-04 rear
19" × 11" +79 05-13 rear
19" × 12" +59 06-13 C6 Z06 & Grand Sport
20" × 10" +79 C7 rear w/ Z51
20" × 12" +59 06-13 C6 Z06, ZR1 & Grand Sport rear, 427 Convertible rear, C7 Z06/Grand Sport or ZR1 rear
Also found this on Zip Corvette if someone wants to do their own math.
Wheel back Spacing is very simple and is often confused with the offset. To determine a wheel's offset you must first find the wheels back space. The back space can be measured in inches but should be converted to millimeters before proceeding to find the offset. To find the back space place a straight edge across the rear of the wheel and measure to the mount pad. The distance equals the wheels back space, which in this case is 6.75". Multiply the back space by 25.4 to convert the back space to mm (6.75" x 25.4mm = 171mm).
Wheel offset is the distance between the centerline of the wheel to the wheel mount pad. It is measured in millimeters and the outcome can result in a zero, positive or negative measurement. To have a zero offset, the wheel mount pad must be even with the centerline of the wheel. A positive offset means that the mount pad is shifted past the centerline towards the face of the wheel, while a negative offset means the mount pad is shifted past the centerline towards the rear, or the brake side of the wheel. To determine the offset of a wheel you must first measure the overall width of the wheel. Lets say the wheel measurements are 18" x 9.5". Now convert the width to millimeters by multiplying the width by 25.4mm (9.5" x 25.4mm = 241mm). Next divide the wheel width by 2 to determine the wheels centerline (241mm/2 = 121mm). With the centerline and back spacing of the wheel determined and converted to millimeters simply subtract the centerline from the back spacing for the offset (171mm - 121mm = +50mm).
Just thought I'd share since I haven't seen this posted before and see if anyone else has seen it. If it's a dup then sorry.
CORVETTE WHEEL SIZE & OFFSET CHART
Size Offset Application
17" × 8.5" +56 88-96 front/rear, 97-04 front
17" × 9.5" +54 88-96 front/rear, 97-04 front
17" × 11" +36 90-95 ZR1 rear
17" × 11" +50 96 Grand Sport rear
18" × 8.5" +56 88-96 front/rear, 97-13 front exc. C6 Z06, ZR1, Grand Sport, C7 front exc. Z51
18" × 9.5" +40 84-87 front/rear, 06-13 Z06 & Grand Sport front
18" × 9.5" +57 97-04 rear, 05-13 front
18" × 10.5" +58 97-04 rear
19" × 8.5" +56 C7 front w/ Z51
19" × 10" +40 06-13 C6 Z06, ZR1 & Grand Sport front, 427 Convertible front
19" × 10" +43 C7 Z06 or Grand Sport front
19" × 10" +56 97-04 rear
19" × 10" +79 05-13, C7 exc. Z51 rear
19" × 10.5" +42 C7 ZR1 front
19" × 11" +64 97-04 rear
19" × 11" +79 05-13 rear
19" × 12" +59 06-13 C6 Z06 & Grand Sport
20" × 10" +79 C7 rear w/ Z51
20" × 12" +59 06-13 C6 Z06, ZR1 & Grand Sport rear, 427 Convertible rear, C7 Z06/Grand Sport or ZR1 rear
Also found this on Zip Corvette if someone wants to do their own math.
Wheel back Spacing is very simple and is often confused with the offset. To determine a wheel's offset you must first find the wheels back space. The back space can be measured in inches but should be converted to millimeters before proceeding to find the offset. To find the back space place a straight edge across the rear of the wheel and measure to the mount pad. The distance equals the wheels back space, which in this case is 6.75". Multiply the back space by 25.4 to convert the back space to mm (6.75" x 25.4mm = 171mm).
Wheel offset is the distance between the centerline of the wheel to the wheel mount pad. It is measured in millimeters and the outcome can result in a zero, positive or negative measurement. To have a zero offset, the wheel mount pad must be even with the centerline of the wheel. A positive offset means that the mount pad is shifted past the centerline towards the face of the wheel, while a negative offset means the mount pad is shifted past the centerline towards the rear, or the brake side of the wheel. To determine the offset of a wheel you must first measure the overall width of the wheel. Lets say the wheel measurements are 18" x 9.5". Now convert the width to millimeters by multiplying the width by 25.4mm (9.5" x 25.4mm = 241mm). Next divide the wheel width by 2 to determine the wheels centerline (241mm/2 = 121mm). With the centerline and back spacing of the wheel determined and converted to millimeters simply subtract the centerline from the back spacing for the offset (171mm - 121mm = +50mm).
Last edited by mstromquist; Jun 11, 2018 at 01:31 PM.
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Thanks for posting that info. Should be very useful to other members.
Racer
Joined: Nov 2012
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From: Sunnyvale Texas
Also, here is a site to test different widths and offsets. It's not exact, due to various differences from manufacturers, but has a lot of useful information and could be helpful.
https://www.wheel-size.com/calc/?whe...cl=50mm&sr=0mm
https://www.wheel-size.com/calc/?whe...cl=50mm&sr=0mm
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Great info to have at your fingertips!
Thanks for posting this, Mark!
Thanks for posting this, Mark!
Le Mans Master
Joined: Jul 2011
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From: Morristown New Jersey
Oldtimer
Also, here is a site to test different widths and offsets. It's not exact, due to various differences from manufacturers, but has a lot of useful information and could be helpful.
https://www.wheel-size.com/calc/?whe...cl=50mm&sr=0mm
https://www.wheel-size.com/calc/?whe...cl=50mm&sr=0mm
https://tiresize.com
