Click to expand Tap to zoom RC10B74 Center Differential Spur Gear Set (72T & 78T) by Team Associated Save $-16.50 $16.50 | / SKU ASS92149 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart This is a replacement Team Associated RC10B74 Center Differential Spur Gear Set, including one 72 Tooth and one 78 Tooth Spur Gear.