19" rims, 35 series front, 30 series rear??

So I got some 19" 19x9 and 19x10

I am due for some new tyres

I am at full BPU right now and enjoying it, I will stay like this for a while.

I wanted to focus now more on handling performance and overall ride feel.

For 19" rims, would 255/35 and 285/30 setup work?

Or should I just stick with 255/30 and 285/25?

I figured with more sidewall on the front and back that wold improve traction and cornering?

My concern is if the overall diameter size would be too big? and would there be any issues with it being too big for the wheel wells?

I'm also running 35 series front and 30 at the rear. That won't affect speedo readings.

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I'm also running 35 series front and 30 at the rear. That won't affect speedo readings.

I'm also running 35 series front and 30 at the rear. That won't affect speedo readings.

 

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I'm also running 35 series front and 30 at the rear. That won't affect speedo readings.

Same here..

I meant to say 40 series front, and 35 rear.

I've been running 35/30 all along.

Other than the speedo which I could get corrected to read properly, would there be any big improvement with the thicket side walls?

Use this

http://www.etyres.co.uk/tyre-size-calculator.htm