Grennan
Slayer of Stupid Threads
- Joined
- Mar 13, 2007
- Messages
- 2,513
- Reaction score
- 78
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- 0
- Location
- Glen Waverley, Victoria
- Members Ride
- VE SSV G8 Sportswagon
**UNDER CONSTRUCTION**
DISCLAIMER: The following thread should be used as a guide only. This is not a comprehensive 100% these wheels will fit . It requires the reader to use their own brain to determine if the following specifications fit their driving style, environment and their car, because every car has slightly different tyres/suspension/wheel allignment/camber when getting to the absolute maximum of your guards, measurements need to be done on YOUR end. I am also not going to guarantee that the fitment and sizing is legal in your state, please confirm with your local laws and/or insurance company if you have concerns.
If you message me and blame me for your inability to measure, I will reply with assorted pictures of male genitalia, they may or may not be human.
So welcome to the JustCommodores, "Will It Fit" thread. Firstly, I would like to credit a user by the name of SpeedRacerX from the US G8 Forums. I spent many months trying to find information on fitment for my VE Commodore and his thread was a wealth of knowledge. You can find his thread here: Offset Reference Ranges - "Will it Fit?" - Pontiac G8 Forum: G8 Forums - G8Board.com If you have about 3 months of spare time, you can read it. My aim is to present the information a little easier and more suited to Australia. The US guys tend to do things a little bit differently and tend to stick with smaller sized wheels such as 18 and 19".
First and foremost, I want to go through some wheel fitment terms you will find in this thread:
Offset: The offset of a wheel is the distance from its hub mounting surface to the center line of the wheel. This measurement is one of the most important things you will need to know.
Poke: Poke is the term used where the wheel protrudes from the wheel arch. Typically refers to the wheel being further out towards the guard.
Tuck: Wheel sitting inside the arch/guard, when lowered some of the wheel disappears as the arch/guard hides it.
Stretch: Refers to stretching a narrower tire over a wider wheel, the sidewalls stretch from the lip to the tread.
Stance: Broadly speaking it means having an aggressive wheel fitment as well as vehicle height.
Staggered: Staggered wheels generally refer to having two different width wheels on the front and rear of the vechile. IE 8.5" Front and 10" Rear.
Spacers: Wheel Spacers are a thin peice of metal that usually bolt or slip on between the wheel and hub adding extra offset. Spacers can be unsafe.
What is standard and why do I need to know?
17-19" Holden Wheels (Including SSV) are 8" wide with a +48 offset.
19-20" HSV Wheels Front: 8.5" Wide +36 offset Rear: 9.5" +57 offset.
These are your base measurments. Learn them. When calculating if your wheels will fit. You will be adding dimensions to the standard size wheel to get an idea.
How To Measure My Own Specs
Online Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit
Is a fantastic website for giving you an easy way to visual how they fit.
For example. Im fitting 10" wide +30 offset wheels to my Holden SSV with 255/35/20 tyres.
This is what I am presented with:
On the right hand side I am show the new measurments as well as the old measurements on the left. This is a very basic indication of where the wheel will sit. Be warned, it will not take into account each individual cars suspension layout, inner guard configuration etc. Using these measurements you need to measure where the wheel will sit on your car. On the front, you need to take into account things like where the front strut is and if you will hit it. A wider wheel for example will need a lower offset (somewhere around the 30s) to clear the shock absorber. You also need to take into account the inner guard lining, passengers and fuel tank weight as well as suspension height for the rear. At the maximum limits, camber is also a very important factor.
Front Specifications
These are specs that will fit with minimal front guard work.
Rear Specifications
*WILL FILL*
MISC Measurements:
*WILL FILL*
DISCLAIMER: The following thread should be used as a guide only. This is not a comprehensive 100% these wheels will fit . It requires the reader to use their own brain to determine if the following specifications fit their driving style, environment and their car, because every car has slightly different tyres/suspension/wheel allignment/camber when getting to the absolute maximum of your guards, measurements need to be done on YOUR end. I am also not going to guarantee that the fitment and sizing is legal in your state, please confirm with your local laws and/or insurance company if you have concerns.
If you message me and blame me for your inability to measure, I will reply with assorted pictures of male genitalia, they may or may not be human.
So welcome to the JustCommodores, "Will It Fit" thread. Firstly, I would like to credit a user by the name of SpeedRacerX from the US G8 Forums. I spent many months trying to find information on fitment for my VE Commodore and his thread was a wealth of knowledge. You can find his thread here: Offset Reference Ranges - "Will it Fit?" - Pontiac G8 Forum: G8 Forums - G8Board.com If you have about 3 months of spare time, you can read it. My aim is to present the information a little easier and more suited to Australia. The US guys tend to do things a little bit differently and tend to stick with smaller sized wheels such as 18 and 19".
First and foremost, I want to go through some wheel fitment terms you will find in this thread:
Offset: The offset of a wheel is the distance from its hub mounting surface to the center line of the wheel. This measurement is one of the most important things you will need to know.
Poke: Poke is the term used where the wheel protrudes from the wheel arch. Typically refers to the wheel being further out towards the guard.
Tuck: Wheel sitting inside the arch/guard, when lowered some of the wheel disappears as the arch/guard hides it.
Stretch: Refers to stretching a narrower tire over a wider wheel, the sidewalls stretch from the lip to the tread.
Stance: Broadly speaking it means having an aggressive wheel fitment as well as vehicle height.
Staggered: Staggered wheels generally refer to having two different width wheels on the front and rear of the vechile. IE 8.5" Front and 10" Rear.
Spacers: Wheel Spacers are a thin peice of metal that usually bolt or slip on between the wheel and hub adding extra offset. Spacers can be unsafe.
What is standard and why do I need to know?
17-19" Holden Wheels (Including SSV) are 8" wide with a +48 offset.
19-20" HSV Wheels Front: 8.5" Wide +36 offset Rear: 9.5" +57 offset.
These are your base measurments. Learn them. When calculating if your wheels will fit. You will be adding dimensions to the standard size wheel to get an idea.
How To Measure My Own Specs
Online Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Speedo Error | Will They Fit
Is a fantastic website for giving you an easy way to visual how they fit.
For example. Im fitting 10" wide +30 offset wheels to my Holden SSV with 255/35/20 tyres.
This is what I am presented with:
On the right hand side I am show the new measurments as well as the old measurements on the left. This is a very basic indication of where the wheel will sit. Be warned, it will not take into account each individual cars suspension layout, inner guard configuration etc. Using these measurements you need to measure where the wheel will sit on your car. On the front, you need to take into account things like where the front strut is and if you will hit it. A wider wheel for example will need a lower offset (somewhere around the 30s) to clear the shock absorber. You also need to take into account the inner guard lining, passengers and fuel tank weight as well as suspension height for the rear. At the maximum limits, camber is also a very important factor.
Front Specifications
These are specs that will fit with minimal front guard work.
| Wheel Specs | Offset Range | Tyre Size | Comment |
|---|---|---|---|
| 20" * 8.5" | +20 up to +42 | 35/245 | +20 is at the extreme end of the fitment spectrum. See 10" +35 for fitment example. 30 is fairly flush - See Grennan's Wagon |
| 20" * 9" | +26 up to ? | ? | +30 offset would be fairly safe, would sit ~+5mm more out than 8.5" +30 +26 would be pushing similar to 8.5" +20. Not many examples. |
| 20" * 9.5" | +34 up to +40 | 35/255 | +30 would be similar to a 10" +35. Pushing the front guard limits. Would feel comfortable in the 34-40 range. Anything 40+ run the risk of fouling strut. May require slight roll. |
| 20" * 10" | +35 | 35/255 | 35 will poke a little, see: Blockab's Wagon You need to run around a 35. +38-40 you may foul on the strut. Its a very fine line. May also require slight roll. |
Rear Specifications
*WILL FILL*
MISC Measurements:
*WILL FILL*
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