AtomiK

What is a spur gear and where should it be located? I am very new to this hobby and I kinda need some help. Also, would a .12 engine fit in a .15 engine space?

sausage_link

heh
the spur gear is the large gear that connects to the engines clutch

buggyman81

ill try and answer your second question, im guessing your asking if they are the same size and they are just about the same size but if you get an engine make sure the shaft on the engine will fit onto the car.

esham

I did saw on option parts that did selling this spur gear but what really this spur gear do? What are the gear improve? Acceleration or...

spitfire

It can add Acceleration or top speed depends on which one you buy. Are you talking HPI?