Commodore tyre & rim size recommendations and limitations guide

[thewheeldeal com au]

Hi Guys,

I see a lot of posts where people are asking what tyres will fit what rims, what rims will fit what car, what's legal, what's not etc etc.



I have created a simple spreadsheet explaining recommended tyre sizes by model and rim diameter which may or may not prove useful to everyone. Whilst it is a good guide, it is just that; a guide. Please don't think that other fitments aren't possible but the recommendations made are based on generally accepted legal practices and experience. Some states have varying laws which may or may not conflict with the recommendations made.

I know people have put 'extreme' fitments onto vehicles such as 22" wheels but the guide makes recommendations on what can be done legally in most states.

All feedback is encouraged.





Cheer guys

[Rolla_Rolla']

Cheers mate, that is an awesome guide for everyone that is always looking for the maximum legal wheels / tires

[Matty-346]

Is this the same for utes as well as I am looking at 20's and hav heard I can go wider tires then 225's on the back...

[thewheeldeal com au]

Is this the same for utes as well as I am looking at 20's and hav heard I can go wider tires then 225's on the back...

Yes you can put wider tyres on the back, but they won't be legal because the outer diameter is too large if you don't increase the profile.

You can however fit a 245/30R20.

[chargedvx6]

Yes you can put wider tyres on the back, but they won't be legal because the outer diameter is too large.

Will they still be illegal if the speedometer is recalibrated considering that the speedo signal comes from the rears?

[thewheeldeal com au]

Will they still be illegal if the speedometer is recalibrated considering that the speedo signal comes from the rears?

Yes, still illegal - the law in question has nothing to do with the speedo, it relates to the outer diameter of the tyre. You cannot increase the outer diameter of the tyre by more than +15mm above the largest standard tyre for that vehicle.

[V8Silverfox]

I have 19" wheels with 275's on the back of my VZ, bought it like that. God only knows how they fit ... just!

[thewheeldeal com au]

I have 19" wheels with 275's on the back of my VZ, bought it like that. God only knows how they fit ... just!

If they are 275/30R19's they are the correct diameter...but the width is another legal issue.

[V8Silverfox]

If they are 275/30R19's they are the correct diameter...but the width is another legal issue.

Yes that's the correct size, the width is not a legal issue in NZ

Catching on the guards, now that's another issue ....

[big fella]

In your table you have mentioned that 20" rims on a VE are non compliant due to the load index rating. Seeing as HSV have 20" rims how can this be possible or have I missed something?

Regards

Andrew

[thewheeldeal com au]

In your table you have mentioned that 20" rims on a VE are non compliant due to the load index rating. Seeing as HSV have 20" rims how can this be possible or have I missed something?

Regards

Andrew

You've missed something...(are you looking at the 22" column?)

[big fella]

You've missed something...(are you looking at the 22" column?)

Sorry......... didn't take the time to separate the differences in colour. I've think I may have misplaced my brain today!

[victor71]

so if i get a set of 20's for my vyss will i have any problems with the speedo? help please

[thewheeldeal com au]

so if i get a set of 20's for my vyss will i have any problems with the speedo? help please

Not if you use 245/30R20's all round.

[DJDONII]

i was just wondering i have 1990 vn whats the biggest rim i could fit on that is it that 18's are legal and 19's arnt?

[thewheeldeal com au]

i was just wondering i have 1990 vn whats the biggest rim i could fit on that is it that 18's are legal and 19's arnt?

19's are fine on your VN.

[lastlegend]

Not if you use 225/35R20's all round.

Just wondering what the difference will be on my VYSS to the speedo as I just purchased a full set of VE GTS 20" Copies fitted with 225/30/20"s but I will also be fitting F&R Coilovers shortly which will allow me to fit wider tyres.

My local Tyre-Zone here in Capalaba stated that since I am going to fit Coil-overs F&R I should be running 245/30/20's not 225/35/20's as the 225's are over stretched on a 8.5" wide rim....is this true?

[thewheeldeal com au]

Just wondering what the difference will be on my VYSS to the speedo as I just purchased a full set of VE GTS 20" Copies fitted with 225/30/20"s but I will also be fitting F&R Coilovers shortly which will allow me to fit wider tyres.

My local Tyre-Zone here in Capalaba stated that since I am going to fit Coil-overs F&R I should be running 245/30/20's not 225/35/20's as the 225's are over stretched on a 8.5" wide rim....is this true?

This is correct, and is something I have been meaning to update on the chart. 245/30R20's are actually a better size than the 225/35R20's for pre VE vehicles however the 93 load rating may be an issue on some vehicles.

[guyman]

hi there, the current stock tyre on my vy s is a 225/50/16 i am thinking of upgrading to 19's and my local tyre shop told me in order to keep the same rolling diameter (hence the speedo calibrated correctly) i need to get 235/30/19...is this true? also i cant seem to find any tyres this size for sale are they rare? do i have any other options? maybe 18's?
thanks for your help

[thewheeldeal com au]

hi there, the current stock tyre on my vy s is a 225/50/16 i am thinking of upgrading to 19's and my local tyre shop told me in order to keep the same rolling diameter (hence the speedo calibrated correctly) i need to get 235/30/19...is this true? also i cant seem to find any tyres this size for sale are they rare? do i have any other options? maybe 18's?
thanks for your help

Your VY should have 225/55R16 standard (not 225/50R16)) and the correct replacement in 19" is a 245/35R19 - there are plenty of options in this size.

[guyman]

Your VY should have 225/55R16 standard (not 225/50R16)) and the correct replacement in 19" is a 245/35R19 - there are plenty of options in this size.

its a series 1 s-pac sedan...just checked redbook and it also says that they came out with 225/50/16's

[thewheeldeal com au]

its a series 1 s-pac sedan...just checked redbook and it also says that they came out with 225/50/16's

Yes, but what does your tyre placard say is the largest size allowable? 225/55R16, maybe 215/60R16? there will likely be a few different sizes listed on it.

[guyman]

Yes, but what does your tyre placard say is the largest size allowable? 225/55R16, maybe 215/60R16? there will likely be a few different sizes listed on it.

it states the 2 you have listed plus 235/45/17, does that mean i can fit any tyre with the same rolling diameter as any size listed on my card?

[thewheeldeal com au]

it states the 2 you have listed plus 235/45/17, does that mean i can fit any tyre with the same rolling diameter as any size listed on my card?

Correct....

[PIMPN AINT E-Z]

hi there i have a vz sv6 and just wondering if u wats the pcd? and if i chuck 20's on and drop it ssl all way round. . will the back tyres sit inwards like past models? cause i herd these cars already have camber kits so u dont have to buy one to fix the sitting inwards of the back tyres? is that tru cheers