Questions about changing wheels.

[Guest001]

[QUOTE=dylan8;939743]I havnt read the regs for a year or two.
but I thought it was 2" bigger then the largest size on your placard 1" wider then the widest on placard.
is the +/-15mm in relation to tyres or wheel diameter? tyre diameter will make more sense, ill have a look[/QUOTE

Is overall diameter Use the tyre comparator in the first reply and you can see what you can use legally

[The_Hawk]

I thought it was 2" bigger then the largest size on your placard 1" wider then the widest on placard.

I was the same, it looks like it has been changed to this instead as it talks to total wheel size (including tyre) rather than *just* the rim. Mind you if I read it correctly it opens the door to stupid big wheels with rubber painted on...

[Diesel_vert]

I was the same, it looks like it has been changed to this instead as it talks to total wheel size (including tyre) rather than *just* the rim. Mind you if I read it correctly it opens the door to stupid big wheels with rubber painted on...

Requirements regarding the load index limits the range of tyres that can be fitted on the vehicle.

[Guest001]

I was the same, it looks like it has been changed to this instead as it talks to total wheel size (including tyre) rather than *just* the rim. Mind you if I read it correctly it opens the door to stupid big wheels with rubber painted on...

Exactly and with the roads the way they are who wants 22's with rubber bands on them ROFL IT has always been total diameter as far as I know and QLD did have diagrams to illustrate that

[Diesel_vert]

The regulations in QLD, NSW, VIC and SA all refer to the overall diameter.

As I said, load index requirements limit what can be fitted to a vehicle.

On a vehicle with 225/40 R18 92Y XL tyres (diameter 637 mm), a 225/30 R20 85Y XL tyre (644 mm) would be within limits (< 15 mm), but the load index (85 < 92) would clearly prevent the vehicle from being roadworthy.

[fully]

So to keep it legal, I could go 18s with 235/40/18 tyres as a max, but 225/45/18 would be illegal?

[Dutch77]

So to keep it legal, I could go 18s with 235/40/18 tyres as a max, but 225/45/18 would be illegal?

The usual 18 on a Golf is 225/40 - so if you were looking at keeping an OEM look and picking up GTI/R 18s then this would be on them.

[Diesel_vert]

So to keep it legal, I could go 18s with 235/40/18 tyres as a max, but 225/45/18 would be illegal?

Yes, that's fine.

[fully]

Yes, that's fine.

Will there be any issue on vw stock 18s with rubbing?

[Dutch77]

Will there be any issue on vw stock 18s with rubbing?

Not on 18 x 7.5 (Detroits) or Talladegas (18 x 8?) using 225/40 rubber. It may look a little '4wd-ish' on 18s, you may wish to consider a mild drop in ride height to complete the look.

[Diesel_vert]

Will there be any issue on vw stock 18s with rubbing?

Can't say for certain. It will depend on the wheel offset and suspension setup. Sticking with the OEM wheel and suspension will minimise any chances of rubbing. More aggressive setups will increase it.

Not on 18 x 7.5 (Detroits) or Talladegas (18 x 8?) using 225/40 rubber. It may look a little '4wd-ish' on 18s, you may wish to consider a mild drop in ride height to complete the look.

That reminds me:

Fitting a 235/40 R18 tyre on a 8.0J x 18 wheel is acceptable, but will render the vehicle unroadworthy if fitted on a 7.5J x 18 wheel.

[larsie]

Will there be any issue on vw stock 18s with rubbing?

I just had 18" x 8.5 wheels put on my Mk5 Golf with 235/40r18 tyres. Absolutely no rubbing and in terms of ride, I've only noticed a very slight difference, ie a bit firmer ride and feel bumps slightly more (old wheels were 17"x 7 with 225/45r17 tyres). I'm hoping the trade off is more traction with 10mm extra width rubber on each corner.