Traxxas 3973 - Gear Set, Close Ratio (1St Speed Gear 21T, 18T Input Ge by Traxxas $12.50 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Traxxas 3973 - Gear Set, Close Ratio (1St Speed Gear 21T, 18T Input GeBrand: TraxxasPart Number: 3973Replacement or upgrade part for these Traxxas models:39036 - E-Maxx Brushless