Tyre Sizes on OEM CSL wheels

[Attilio]

Hello all,

this is a topic that has most likely discussed to death over the past years but - hope you don't mind - I would like to add another layer to it:

I am about to get tyres for my new OEM CSL wheels (as soon as I will have some clarity about the lifting of restrictions here in Ireland).

My understanding is that the E46 M3 CSL sizes - R19 8.5" front and 9.5" rear width rims - are (were) 235/35 R19 and 265/30 R19 respectively.

Now, the OEM sizes for the Z4M are 225/45 R18 (front) and 255/40 R18 (rear); I am thinking that it may make sense to actually fit 225/35/R19 (front) and 255/35 R19 (rear) to maintain a near-identical rolling circumference and at the same time not reducing the sidewall too much. I am aware that the tyres may be a bit stretched once the same width is fitted to a 1/2 inch wider rim

Any opinion / experience in this regard? Have any of you maintained the same tyre width while going up in diameter?

Thanks in advance for your input
Attilio

 

[Argenta]

I use 265/35 rear which is close to OEM diameter and looks good imho.
(Also better comfort and better gearing on motorways)

 

[R60BBA]

The OE CSL sizes would be a better option, they are wider than your suggestion and so will offer more grip.

 

[mmm-five]

I think I ran 235/35r19 and 265/30r19 when I had them on mine - but I found them too crashy with the OE suspension, so replaced them with 224M wheels after a couple of months (did a part-ex with someone on the forum).

If I were to go to 19" wheels again, I'd definitely put bigger rubber on them - the 265/35 r19 sounds fine, but I'd even go as far as trying to get away with a 275/30r19 if I knew there'd be no rubbing.

 

[tomscott]

You can but it won't leave much protection for the wheel. Standard sizes give your a bit more rubber on the road and a little more protection.

Ive run OE sizes 235s/265s for years on mine and its been spot on

Others do run different sizes and you can run a 255. Depends on the tyres sometimes you can get better deals etc

Interesting on the crashing I don't find any difference what so ever, my last car had H&Rs and im on standard sus atm and if there is a difference it is very negligible.

 

[Attilio]

Thanks for your responses guys, really appreciated it!

I think I will go for 235/35 R 19 at the front and 265/35 R19 at the rear!

Thanks again
Attilio

 

[MichaelK]

Does anyone get arch liner rub on full lock with the 235/35/19 fronts? I seem to on my passenger side

 

[R60BBA]

Does anyone get arch liner rub on full lock with the 235/35/19 fronts? I seem to on my passenger side

Is your car lowered and are you running spacers?

 

[Argenta]

For reference I'm on KWV3 (previously Eibach Pro) and no spacers.

 

[Nickbmw08]

I’ve just fitted some CSL wheels fronts 235/35/19 and I’m getting some rubbing on the outer front edge when I go round corners on the drivers side? Car was lowered by previous owner with H&Rs!

I’ve jacked the car up and it doesn’t rub on both locks but it’s very close! Would 225/35 on the front solve the problem?

 

[Attilio]

Thank you all for your input and advice!!!