Hyper 9E

[Cain]

i was told that if the seals are red, its the new seals, if they are black, its the old seals.

as for diff comparison sizes, the box has a picture on the box comparing the two, I think I posted a pic of that comparing I am assuming the previous standard size diffs versus the new small diffs.

as for gearing, on a 2200kv motor, the 14T pinion on 4S assuming a 4.5in tire diameter (ala crimefighters) from the RC Calculation website gives a speed of about 40mph. Usually you gear for that speed to start with in general.

I would say if you want mid 40s, go with a 16T pinion

http://scriptasylum.com/rc_speed/_top_speed.html

too bad the coupon for answerrcusa site doesn't work for anything under $40. 20% off would be nice.