Sport wheel offset

[Grandad]

Anyone know, please, the factory offset for Mk2.5 1.8 Sport wheels?

[Phil @ P5]

+40 (16x6.5)

[Grandad]

Hi Phil..............Many thanks for that.

[Grandad]

If a stock size of tyre for the Mk2.5 is 195/50x15 and the Mk2.5 Sport runs on 205/45x16 how, in that these tyres have different overall diameters, can they both have zero scrub radii? Are the suspension geometries different or does the stock 15inch wheel have a different offset to the stock 16inch wheel?

[MX-5 Lazza]

MX-5 geometry is very adjustable - Front Toe, Caster & Camber and rear toe & camber. A good alignment place like Wheels in Motion can get the scrub radius right regardless of the wheels/tyres. There is much more to alignment that scrub radius - don't ask me though, it's all well over my head

[skinny]

i've nto done the calcs but i can't imagine that the difference in rolling radius is dramatically different, if they are the same offset, the scrub radius may change by a couple mm but it's not going to make much difference - i doubt either run at 0 scrub radius either, i didn't think it was especially desirable?