Originally Posted by rc-zombies

yes! 18T way too tight! the 17T is a little tight even with the main pulley at it's loosest position.. I think eventually with the 17t.. the belts should start to loosen up after several runs..
with the 17T the transmission ratio changes to 2.2941 : 1

I will try the 18T with a smaller 36T pulley from my old Pro3 and will have a 2.0:1 ratio.

If HB does release a 18T pulley..hope they have new belts to go with them.