i`m running 17/46 with a 530 conversion. for street running the 530 is a overkill. the gearing isnt bad as long as your not freeway commuting. it runs 4500 rpm @55, 5500 rpm @ 65 and 6000 rpm @75. for twisty stuff it makes 2 gears useable everywhere. the tight spacing of 4th , 5th and 6th make dropping three at 80mph and below while on the brakes comforting and the relatively high first gear makes dropping into first @ 30mph (as long as your handy with your clutch) not too low. thats what i`m running...to each there own.