Originally Posted by
syndr0me
He's running the new 13mm rotor which requires more gear. In general, though, the 13.5 needs a ton.
Which kind of makes me wonder why there's not a smaller kevlar spur available. A 108 and 100 would be nice. A few tweaks (revised rear arm mounts or motor plate?) would be nice, too. 13.5's seem to be popular enough to justify some tweaks to accommodate them. With the larger rotors coming into favor, and the absurd gears required, it might be something worth considering.
when the jrx-s came out and the tooling for these spurs was made, i don't think we had a need to be able to gear from 4.0 to 11.0.