Exotek RC10 B7 / B7D Ultra Light Aluminum Flite Top Shaft & Spur Mount (Exotek Flite/Kimbrough Spur Gear), EXO-2263 Exotek RC10B7/B7D Ultra Light Aluminum Flite Top Shaft and Spur Mount. Constructed from extremely lightweight and durable aluminum, this optional set is approximately 16.8 grams lighter that the stock setup and is intended for the Team Associated RC10B7 and RC10B7D platforms to tremendously boost performance, acceleration and durability! Features:Perfect performance upgrade for the Team Associated RC10B7 and B7D platformsConstructed from extremely lightweight and durable aluminumCompatible with a wide range of Exotek and Kimbrough spur gearsDirect fit drop in for the RC10B7/B7DCooler temperatures and lighter rotation mass Compatible Spur GearsExotek:EXO1543 66 toothEXO1544 69 toothEXO1590 72 toothEXO1545 75 toothEXO1546 78 tooth Kimbrough:KIM301 66 toothKIM150 69 toothKIM143 72 toothKIM161 73 toothKIM162 74 tooth Includes:(1) Aluminum Spur Mount(1) Aluminum Top ShaftMounting Hardware