225 on 8 1/2 ?

[Konstantin]

hi guy , I bought the car and it have 225 front tyres on a 8 1/2 I've been told that the right size is 235 the car is not handling well at height speed ,( I got it checked all arround we could find any thing wrong appart the age of the shocks and the size of the font tyres) any ideas.
many thanks Konstantin

 

[Hacki]

Hard to answer, you didn´t give us so much information. In general, an RS won´t handle "well" at high speed with a wider front tire than the original 205. So, I don´t think it´s the 8,5 rim. (which is IMO too wide anyway) Porsche recommends for Cup cars (not RS) 225 on a 8" rim in the front, but - as often said - it´s always a matter of the full set up. (Camber, toe in, ride height, tire pressure, tire sizes, shocks, springs, ARBs).

If everything else is checked by an expert and seems to be ok, then try the original tire and rim sizes (Maybe there´s a set to test it). You should feel a big difference, especially the wide front tires make the car nervous. I think, it will be even worse with the 235.

Hope that helps a little,

Rgds,

Hacki

 

[Konstantin]

thanks Haki ,I have a set of cups with desent PS02 I try that but the speedline make the car look so amazing but if it is beter with the cup I would change them .
Konstantin

 

[Konstantin]

picture

 

[jason]

doubt it will make that much difference - mine has 225s on 7.5" fronts and handles great

I'd guess it was something else - did you check all the tyre pressures were correct?

 

[Konstantin]

picture

 

[Konstantin]

pressure is find 32 front 36 rear,geometry is find ride height is RS spec, all bushes are find stering rack as well ,the only think shocks have 80000 miles with H&R green???( car is not RS is 92 C4)