Install the GPM TRX4021XB brass outer portal drive housing on a Traxxas TRX4 to add useful mass at the wheels and enhance low speed grip. Each brass housing contributes about 64 grams, which helps steady the axle under load and improves the vehicle's ability to climb and exit depressions smoothly.
Made by brass to increase the weight of each wheel of 182 grams to stabilize the wheel, enlarge the angle of crawling, especially when the car is dig into the low lying area landscape, grab the ground firmly and smoothly drive back to level.
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