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255/35/r18 tire fitment

kep

New member
Car(s)
Mk7 Golf R, 92 Miata
Through a bit of a mix-up I've acquired a set of 255/35/r18 tires on 8.5" ET45 wheels. I know 245/40 can rub due to the increased outer diameter, but I've also seen people claim to run 265.

Does anyone have any experience with this size or know if it will fit? For reference I'm on a stock R, and I've measured the section width to about 9.7"
 

Rollineuro

Go Kart Champion
Location
Reno
I can't help directly, but I run 245/45/17 on 9et45 with zero rub ever, and I ride my car harder than woodpecker lips.
 

Cliff

Drag Racing Champion
Location
San Francisco Bay Area
Car(s)
2015 Cayman GTS
Through a bit of a mix-up I've acquired a set of 255/35/r18 tires on 8.5" ET45 wheels. I know 245/40 can rub due to the increased outer diameter, but I've also seen people claim to run 265.

Does anyone have any experience with this size or know if it will fit? For reference I'm on a stock R, and I've measured the section width to about 9.7"

My R was lowered about an inch and I ran 255/35R18 Dunlop ZIII tires on 18x9et45 wheels with no issues whatsoever. I also ran 265/35R18 on the same dimension wheels with the ride height raised a half inch or so after installing Ohlins coilovers.
 

absoluteczech

GolfMKV ADMlN
Location
SoCal
Car(s)
981 Cayman & GTI SE
35 aspect ratio seems silly on your 18's. not really accomplishing anything.

your overall diameter is exactly the same size as a 225/40 tire so unless you want an oddly skinny sidewall on 18's go for it.

just get 235/40 or 245/40 tires
 

kep

New member
Car(s)
Mk7 Golf R, 92 Miata
cliff,
I remember from your build thread that you were running additional front camber, so I'll check for tire to fender rub. Did you do the fender screw mod?

absoluteczech,
35 aspect ratio means it has the same sidewall as 225/40. My preference would be 235/40, but these are the tires I've ended up with.
 

burgerkong

Go Kart Champion
Location
Ontario, Canadeh
I'm one of the few that run 265/35R18's. Nankang AR-1, Pirelli Trofeo R and RE71R's.

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Cliff

Drag Racing Champion
Location
San Francisco Bay Area
Car(s)
2015 Cayman GTS
cliff,
I remember from your build thread that you were running additional front camber, so I'll check for tire to fender rub. Did you do the fender screw mod?

I was running 2.5 deg front camber, but the car was also lowered significantly while you're at stock ride height. I never did do the fender screw mod. A 255 is a nice meaty tire and a safer fitment than a 265.
 

Mini7

Autocross Newbie
Location
Charlotte, NC
Car(s)
2017 GTi Sport PP
255-35-18 MPS4S on 18x8.5 ET45 with no rubbing issue on my GTI PP
 

FlyingNugget

Passed Driver's Ed
Location
Toronto, Canada
If you don't have any camber upgrades, this will probably rub on the fenders.

I have 18x8.5 +45 wheels.

I had 235/40 Re71R and they rubbed on the fender screw at -0.5 camber.

I now run 255/35 RS4 and they do not rub at -2.4 camber.

On my setup with the 255/35, I would rip my fenders off without the camber.
 
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