245/40x18

[KevinBird]

Will they fit OK on an R26?

[jaybyme]

They will fit,but why would you want to ?

[KevinBird]

They're for our race car

[jaybyme]

Then no I wouldn't put them on,as they are slightly wider but also higher, also not really suitable for an 8j rim.The R26R went pretty well on 225-40-18's, newer models on 235-35-19.

[KevinBird]

They fit fine on an 8J, more rubber on the track, what's not to like?

[jaybyme]

if only it was that simple.
I wonder why Renault put 225's on the R26R ?
If your looking for the best grip for track use,then the type of tyre you choose best suited to the car and rim will be more important

[blackhawk]

I've got 235/40 r18 all round on my recently purchased 08 r26, not the correct size then?

[D11VOO]

235/40 is the correct size for R26 although alot use 225/40.

[Eggcakes]

Yep 235 is right I always use them as I don't like the slightly strechted look of 225 and the price difference is minimal so it's hardly worth skrimpimg on them