1). This kit is for the low-speed vehicle, the motor speed is slow (max 20km/h), but its torque is high, so it is not good for the high-speed project.
If you do not know what motor you need to use, please feel free to ask me.
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2). The motor is 350W each,  the kit’s total power is 700W, the tire is 10-inch, its outer diameter is about 280mm, and width is about 80mm, the axle has 3 types: single axle,  dual axle 130mm, and dual axle 100mm.
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3). This motor has gears inside, the wheel can run max 20km/h, and the kit’s loading weight is 200kg.
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4). The working voltage can be 24, 36V, and 48V, the difference is the working current, if you want to use longer, I recommend 36V and 48V.
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5). This kit does not include a battery, you need to get the battery separately, the lead acid battery and the lithium battery are all ok, and the battery capacity I recommend 20Ah or more.
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6). The wireless remote can control the motors to drive forward, backward, turn left, right, and cruise.
The one-hand remote has a small li-battery inside that is rechargeable.
The two-hands remote uses 4pcs AA battery cell that is not included.
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7). The throttle kit can control the motors to drive forward and backward only, it can not turn, please confirm this.
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8). The bracket for the single axle motor is available.
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9). 4WD and 6WD are all ok.