just checked, works out at 4mph faster using 205 45 17 instead of 185 60 14

[Edited on 17-04-2003 by CRB 553]

Use this calculator to work out the speed difference with larger wheels on;

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Carnt remeber wot the difference is but theres no way its 15mph out, av got 17's and i manage to convoy behind people doin approx the same speed without noticing a difference in speed.....

Realistically its prob about 5mph from experience although the calculator may have other ideas...!:thumbs:

At the mo my sport is on standard an i dont know which to have, 16's or 17's. I want to drop it 40mm but some one told me his speedo was 15mph out on 17's. is this the case? can it be changed?