Originally Posted by
jhock
I run 44-46mm tires. Ive been messing with the 189 with my labtop but when i run boost at max it doesnt seem any faster. Our track has alot of turns in it so there isnt much straight speed. I am going again today to keep messing with my setup. Anymore suggestions? Not sure if this helps, but the track is Debbiesrcworld in Chesapeake, VA indoor carpet.
Here you go: (81-Tooth Spur)
46mm - 37T Pinion = 65.98 Rollout
46mm - 36T Pinion = 64.20 Rollout
46mm - 35T Pinion = 62.41 Rollout
45mm - 38T Pinion = 66.29 Rollout
45mm - 37T Pinion = 64.54 Rollout
45mm - 36T Pinion = 62.80 Rollout
44mm - 39T Pinion = 66.52 Rollout
44mm - 38T Pinion = 64.82 Rollout
44mm - 37T Pinion = 63.11 Rollout
There are obviously more variables to this, but the ratio's are good starting points. Secondly, I would follow the gearing others at your track run with similar motors and ESC's.