255 On An 8in Rim?

[mistermeena]

Does anyone know if its going to be a problem to run 255s on an 8 inch rim? Ive bought some used semi slicks for the track and the rears are 255 on 8s. I realise this isn't ideal as the recommended maximum is a 245 on an 8, but I'm just wondering if this is going to be outright stupid to run on them? Our track is very small, about a 40-45 second lap, and max corner speed would be less than 85/90kph.

Its the last round for the year and I'm upgrading from 215 semis, so I'm really hoping to nail a pb haha

[Hadouken]

255 is square on a 9".

Will buldge on a 8". Will feel doughy and probably a sense of floating when on weight transfer.

Just do it. You might like it. Some people do

[sweefu]

I ran a 255/40 on an 8" rim once (also for rear)

Felt a bit 'doughy' like you could feel the sidewall of the tyre move on the rim during cornering.

I don't regret it though, overall car had more grip and was still fine to control.

Give it a shot

[mistermeena]

Thanks guys that's pretty much what I wanted to hear.

[Duncan]

for track only, right? it's probably not legal for street use as its outside those secret specs that only tyre fitters have but are still apparently legal requirements...

I suspect you wouldn't notice any additional sidewall movement on the track unless you ran them back to back with 245s....just go for it

[KiwiRS4T]

for track only, right? it's probably not legal for street use as its outside those secret specs that only tyre fitters have but are still apparently legal requirements...

Specs are published in NZ - I presume they are similar to the Aussie rules:

LVTA Tyre to rim width.rtf

[mistermeena]

yeah track only Duncan. I just took them for a little drive on the highway and they feel fine at 28psi cold so will see how they go Saturday.

[hardsteppa]

I use 255 rsr's on the rear, on a 17x8 rim. Previously had 235's. Slight bulge but feels alot more solid, can't say i've noticed any doughy feel.

[hardsteppa]

Will add pretty sure overall diameter is smaller tho, being a 40 profile rather than 45, with the 235's.