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R180 4.4 Ratio Lsd, Crown And Pinion. (Or Similar)

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After a bit of searching, I'm pretty sure the standard tyre is a 175HR14 which is close to a 175/80/14 (I think) and your current tyre is a 205/60/15 you now have approx. 1.2% circumference decrease over standard, bringing your final drive ratio closer to:

4.444' x 1.012 = 4.498 : 1


4.5 sits right between a 4.375 and 4.625 so take your pick. If you pick the 4.375, your speedo will read slightly high and vice versa.

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