Cheers, think Ill go with the 18. LRP/Nosram say 12.4 for a 6.5 in 2wd and with the 17t it would be 12.39. But lookign up people are using 20t pinions on 5.5s! So i think a 18 would be about right for me. Speed wont be an issue if you saw my car at Bury, I need some!