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