My new wheels for my polo :)

[llai8501]

How can I check the offset used? I have the 18x7.5's

[dening]

Short Answer...
Google
[ TENZO-R ] TENZO RACING SPORTS

This says they'd be et42 which looks about right from your photos.

Long Answer...

Pull one off and it'd likely be stamped on the back of a spoke.

[Diesel_vert]

Fair enough. I assume at is because they're not wide enough or not as wide as the 225's?

A tyre's load capacity is related to how much air the tyre is designed to hold.

A smaller tyre isn't able to hold as much air, so naturally, it will have a smaller load capacity (as reflected by the smaller load index) and vice-versa.

Always keep in mind that it's the air that's supporting the vehicle - the tyre merely provides a medium in which to hold it. Think how much mass an uninflated tyre is able to support...

[llai8501]

So I et42 a 215/35 will be okay with right tyre load?

[Diesel_vert]

So I et42 a 215/35 will be okay with right tyre load?

The Polo GTI is originally fitted with tyres that have a load index of 87, which suggests that fitting a tyre with a load index of 84 (such as a 215/35 R18 tyre) wouldn't meet NSW roadworthy requirements.

As I said previously, it would be better to try a 225/35 R18 87V XL tyre first.

Considering the OE wheels have an offset of 46, an offset of 42 may be a small enough difference not to matter (which helps).

[llai8501]

Thanks for being patient and it all the info mate!

[llai8501]

Sorry for the dumb question, care there 215/35 with a load index of 87?

[llai8501]

If 215/35/18 with load index of 87 existed it would be pretty near perfect?

[Diesel_vert]

Sorry for the dumb question, care there 215/35 with a load index of 87?

If 215/35/18 with load index of 87 existed it would be pretty near perfect?

A standard load 215/35 R18 tyre will have a load index of 80.

An extra load 215/35 R18 tyre will have a load index of 84.


There is no such thing as a 215/35 R18 tyre with a load index of 87.

[dening]

You'll get it with a 225/35 though right? That's a more common fitment for that wheel.

Then you just have an aggressive offset. Which you have now anyway, but if that's only causing a small issue now with the 40 profile, a 35 profile will make that a little better.

[Diesel_vert]

You'll get it with a 225/35 though right? That's a more common fitment for that wheel.

A standard load 225/35 R18 tyre will have a load index of 83.

An extra load 225/35 R18 tyre will have a load index of 87.

does anyone run 225's on a 6R? I'd have thought you'd need a lower offset for that width in the front. Rears are more likely to fit.

llai8501 has, at this point in time, indicated the only issue appears to be rubbing at the rear with 225/40 R18 tyres.

[MrDeathLad]

i have run 225's... My (Ronal) Aristos (18x7.5 et3 originally came with 225/45 at the front and 235/(45?) at the rear. On the sports pack springs, the fronts would scrub over nearly every (moderate) bump in the road. with nothing at the back unless fully loaded with people. i currently run 215/35 84Y (Kumho ku39), lowered on kw v1 and have not experienced any more scrubbing (except, again, in the rear when loaded with people). running a lower load rating is not to much of a worry for me, considering tolerances, if i am over the load slightly, it is highly unlikely to cause a catastrophic failure. and in regards to roadworthy, if i am defected i still have the boavista wheels (sports Pack) to swap on to clear the defect.

but thats just me and my 2cents

[llai8501]

A standard load 225/35 R18 tyre will have a load index of 83.

An extra load 225/35 R18 tyre will have a load index of 87.

Ah i see, thanks man, you've been a really great help. Really appreciate it.

[llai8501]

i have run 225's... My (Ronal) Aristos (18x7.5 et3 originally came with 225/45 at the front and 235/(45?) at the rear. On the sports pack springs, the fronts would scrub over nearly every (moderate) bump in the road. with nothing at the back unless fully loaded with people. i currently run 215/35 84Y (Kumho ku39), lowered on kw v1 and have not experienced any more scrubbing (except, again, in the rear when loaded with people). running a lower load rating is not to much of a worry for me, considering tolerances, if i am over the load slightly, it is highly unlikely to cause a catastrophic failure. and in regards to roadworthy, if i am defected i still have the boavista wheels (sports Pack) to swap on to clear the defect.

but thats just me and my 2cents

Thanks for your input man, So if you're defected (ive never been defected before), i can just switch out the wheels to my old stock set to clear that?

18x7.5 rims run 215/35 wheels without any issues? (aside from from you mentioned).

I dont have my car lowered, its all stock, so i'm hoping if i run the 215/35 (with a lower load rating but will be a more correct fitment) that it shouldnt scrub at all? Given that i have almost no scrubbing now unless i go over bumps and have people sitting on the back on the 225/40's?

I say this only as i'm worried that 225/35's (although beter than 225/40) may still scrub, where as the higher load 215/35's wont scrub but i'll be under load?

Thoughts?

[MrDeathLad]

Thanks for your input man, So if you're defected (ive never been defected before), i can just switch out the wheels to my old stock set to clear that?

as far as im aware. like you, i haven't been defected before.

18x7.5 rims run 215/35 wheels without any issues? (aside from from you mentioned).

a perfect fit

I dont have my car lowered, its all stock, so i'm hoping if i run the 215/35 (with a lower load rating but will be a more correct fitment) that it shouldnt scrub at all? Given that i have almost no scrubbing now unless i go over bumps and have people sitting on the back on the 225/40's?

a narrower tyre will add clearance, as will a lower profile both together will give maximum clearance (as far as im aware). 215/35 will clear everything. but keep in mind the stock springs will have i lower spring rate, meaning easier to compress (someone correct me if im wrong there) so there may still be rub but only when loaded with 3 big people in the back.

I say this only as i'm worried that 225/35's (although beter than 225/40) may still scrub, where as the higher load 215/35's wont scrub but i'll be under load?

Thoughts?

215/35 is 3mm bigger that stock, 225/35 is an extra 7mm. As i haven't had experience with the 225/35 i cant say it wont rub, but will definitely rub less than the 225/40. Another thing to consider is the off-set (et.) of the wheel as this will change the position of the wheel inside the wheel well. (my rears are spaced 10mm for an et of 28 and scrub on the outside arch not the inside of the well)

i hope everything is covered and not to confusing

Ben


(please, everyone, correct me if im wrong on any of the above. i would like to think I'm an aspiring wheel whore, and always happy to be corrected and learn from my mistakes/ignorance)