what gear pinion?

[Alisonomis]

Hi guys just got a h2 pro presuming its a stock gearing what size pinion should I be running? It was bought second hand so cane with none

[adon30]

What motor are you running?

[damo77]

24t is standard. I run 21t on both of mine with standard 78 spur and lrp 6.5 motor

[Alisonomis]

I have a 21t but my hobbyking 13.5 won't move all the way over so won't connect

[damo77]

it should do. ive had a 20t on mine, unless it has a smaller spur fitted. see what size the spur is. I have a standard spur or a 24 pinion if you need them. I found mine over geared on 24.
Damian

[damo77]

ive just checked the spur size. its 76t standard not 78t

[adon30]

I run 25t or 26t on a 7.5T hpi and think I had 27t on the 8.5T

Not sure on a 13.5T but the kit 24t may be a good start.

[ant potter]

im running 22 on a 7.5 seems to be good

[Coopz]

I'm running my H2 rear mount in the stock 17.5 class and I'm struggling for top speed. Running a Speed Passion motor car just seems to run out of legs halfway down the straight. Using the stock spur with a 30t pinion. If I use a bigger pinion the motor becomes to hot and it lacks low down punch to get over the double jumps. Guys in my class with the Losi 22 and the same motor seem to have more low down and more top end punch:(