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

[Cozza]

What size wheel and tyre combo are you going for?

[locklock]

My rear tyre is 205-60-15

[Cozza]

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.

[locklock]

Thanks, think it should be fine.. we uses km/h anyway, doesnt really matter if its off abit.