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just up the front? wouldve thought all round on the R

The rears I have gone 245 / 45 / 17.

A bit wider on the rears for a tad more grip / traction.

I did question him about it but my mechanic sorted it all out for me and that minor size difference does not effect it at all.

245/45R17 Tire 1 - 235/45R17

Section Width: 9.64 in 245 mm 9.25 in 235 mm

Rim Width Range: 7.5 - 9 in

Overall Diameter: 25.68 in 652.27 mm 25.32 in 643.12 mm

Sidewall Height: 4.34 in 110.23 mm 4.16 in 105.66 mm

Radius: 12.84 in 326.13 mm 12.66 in 321.56 mm

Circumference: 80.67 in 2049.0 mm 79.54 in 2020.3 mm

Revs per Mile: 809.9 821.4

Actual Speed: 60 mph 100 km/h 60.8 mph 101. km/h

Speedometer Difference: - Speedometer Difference: 1.419% too fast

Diameter Difference: - Diameter Difference: 1.41%

jezza, in17" you really want a 45 profile for anything around a size you are gonna want, 40 is for 18's... too low profile makes the wheel look mega homo

for my 17 x 9.5's i'm going 235/45/17

I wish I could fit a 45 profile... Apparently with standard suspension it's a no-go.

Maybe a good excuse to get coilovers though... I'll ask the MR2 boys what to do.

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