Reefs RC Tripple4 High Torque Titanium Gear Digital Servo.
Motor: HV Coreless
Bearing Type: Dual Bearing
Weight: 2.2 oz
Dimensions: 1.6x0.8x1.5" (LxWxH)
Torque: 422oz @ 6.0V / 444oz @ 7.4V
Speed: .11 @ 6.0V / .10 @ 7.4V
Dead Band Width: 2¦Ìs
NOTE: BEC Recommended. Do not power over 7.4V
As far as operation, just using a basic ESC and no BEC, the thing slings the 2.2 tires around with little effort. I cannot wait to see how it is when I throw some extra voltage at it! It's an incredible servo that so far matches up well against another very well known brand that costs 50% more and isn't nearly as quiet!
I cannot see how you can go wrong with this servo. If you need a nice, high torque servo for your crawler, you should pick one of these up!
I am happy with the performance and would buy again.