Well remember the ITP's are heavier than the huallers. Plus with a 7 paddle it won't reqire as much gearing as the popular 22" 9 paddle.
But yes for my setup, I like the 13 in front on the dunes. But on the trails, up here at LS, I'd like it a little lower yet.
a 13-39 = 71.34 top mph (20"tire)
b 13-38 = 77.28 top mph (20"tire)
c 14-36 = 78.96 top mph (stock gearing and stock tires)
d 13-36 = 81.57 top mph (20"tire) This is the combo I ran this weekend. For my riding style, I'd like a 38 for 20" tires and maybe a 39 for 22" tires.
I kept getting dropped out of the hole due to the tall gearing. The only way I could really keep up was to get the jump on the start. (aka good reaction time).