The Savox SA-1230SG Monster Torque Steel-Gear digital servo is the servo that is ideal for those requiring extra torque, but not using high voltage as a power source.
Extremely strong unique steel gears ensure long-life and durability. Ideal for steering on rock crawlers, monster trucks, and large scale aircraft. Slightly taller case design. Torque @ 4.8v - 30.0kg/416.6oz-in Torque @ 6v - 36.0kg/499.9oz-in Speed @ 4.8v - 0.20 sec/60 deg Speed @ 6v - 0.16 sec/60 deg Dimensions L x W x H (mm): 40.3 x 20.2 x 44.9 Weight: 79g