Swap in the GPM TRX4021XB brass outer portal drive housing on a Traxxas TRX4 to increase wheel stability and crawling angle for technical trails. The brass pieces weigh in at about 64 grams each, adding momentum at the tyre contact patch to help the model pull out of hollows and hold line on steep sections.
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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