Trist

On a focus cosworth. But I'm sure same for escort or sapph.
If someone wants to use 255/40/17 toyo R888 on the rears. What would the equivalent tyre/sidewall size be for 215/17
Also what width wheel would suite 255 and what's availble.
Thanks.

CosworthGuy

255 40 tyres 636mm diameter and a 205 50 tyre is 637mm diameter . 215 would be 647 mm

Trist

How close can you be with 4x4.

scoooby slayer

iTrader: (4)

get as close as you can is my advice , the 205 should be ideal if the calc is correct at just 1mm bigger total diameter

Trist

Any way of getting. Bit more. 215? What width wheel for 255?

cossynut2

There has been questions before about Sapphire Cosworth tyre sizes and I dont know if there is a difference with a 4wd as I have a 2wd, but I can say for certain that with 17inch wheels on a lowered car anything wider than 205/40/17 will be a clearance problem. I had a set of Toyo track day tyres 215/45/17s and even with my rolled arches they still hit the bodywork. I now have 205/40/17s and they clear ok.

Trist

215s fit on the rear of Sapphs with and without coilovers.

cossynut2

Try running the 215/40/17s on the rear with 205/40/17s on the front ?

Trist

Yes that what he runs on his cosworths
Question is regarding fitting 255 to a 4x4 focus. What the equivalent diameter is in a 215. As that wil fit under focus arch with 20mm spacers.
And what wheel width will take a 255. Guessing between a 8.5 and 10 inch.

cossynut2

Didnt realise you were talking about a 4x4 Focus wheels?

Sonic Boom

iTrader: (11)

The ideal width for a 255 on a 17" rim is a 9J

Rich

Trist

Thank you.