[Marvin]

Either 5S or 6S is good in a truggy. I would go with 5S however, as you have more choice of ESC's, the batteries are slightly cheaper, and if you are running a MMM, you have a small amount of lee-way for the voltage.

Is it the X1 or the X2?

X1:
Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Additional Ratio: 1
Spur Tooth Count: 62
Pinion Tooth Count: 16
Battery Voltage: 18.5
Motor KV: 1663.4551
Tire Diameter (inches): 5.6
Top Speed (MPH): 40

(This is gearing for 40mph, using a 16T pinion, which is a nice size, as it gives a good mesh, but is still readily available)

X2

Differential Ratio: 4.3
Transmission Ratio: 1
Additional Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 16
Battery Voltage: 18.5
Motor KV: 1674.1871
Tire Diameter (inches): 5.6
Top Speed (MPH): 40

(Same as above)

So you need a motor at between 1600 and 1700 kV.


I would try:

• Neu 1515 2.5d/F (1700kV) (http://www.rc-monster.com/proddetail...5_2.5dF&cat=20)
• Medusa 36-70-1600 (1600kV)(http://www.rc-monster.com/proddetail...usa3670&cat=20)
• Tekin T8 1700kV Truggy Motor (http://www.rc-monster.com/proddetail...ekinrx8t8motor) (This is sensored, but can be run sensorless, like any motor)