RE: 8ight Truggy
doesnt a higher tooth spur gear soften up the bottom. i notice a lot of guys with the 28s are running the 50 t cause it takes a lil punch of the bottom and brings the top end up. with the 21 i would say stick to the 48t because it adds a lil torque to the bottom from what i see. thats just my experience. hope it helped