Tire size questions
 

Hi there

I am about to update my tires and had a sizing question

I have ordered the 295/30/19 which I know will fit on my 2010 roadster with the sport package (rays wheels)

Question on the fronts

is a 255 40 19 ok for the front

Tire size questions
 

Why such a small sidewall in the rear? Are you lowered?

Tyre size are mismatched for overall diameter.

295/30R19 is ~659mm
255/40R19 is ~687mm

A better pairing is 295/35R19 in the rear, if such a size is available. If you wish to stick with the 295/30 rear profile (even though the ride will be harsh), try 255/35R18 at the front.

not lowered. I was given a set of brand new 295/30/19 so trying to match the fronts as best as I can

255/35's
what flavor tire are they?

Ah that explains it... BG is right then with a 255/35

thanks everyone

Since you've already purchased the rears at 295/30R19, a better match for the fronts would be 255/35R19. Diameter and sidewall will match. Here's a link to a tire size calculator.

https://tiresize.com/calculator/

You can get away with 265/35 19s in front.