Rota sure has a lot of designs! Those CKs are pretty sweet
What do you think about 16s on a MK1? I never liked it because of the 40-series profile, but with the lower gear ratios of a 6spd, I bet I could get away with a 16x45 or even 16x50 profile.
Comparisons, 3,000 rpm in 5th gear (stock C52 trans):
14x60x185: 66.9 MPH
15x50x205: 67.9 (+1.4%)
16x40x205: 66.1 (-1.3%)
16x45x205: 68.4 (+2.3%)
16x50x205: 70.8 (+5.5%)
Actually that isn't so bad, about 3 MPH more in 5th gear at cruising RPM. Hmmmmm
I used to run 225 in the rear, so...
15x50x225: 70.2 (+4.7%) <-- old setup
16x40x225: 67.9 (+1.5%)
16x45x225: 70.5 (+5.1%)
16x50x225: 73.1 (+8.5%)
Wow nearly 9% larger than stock...