Tractor tires are narrow so they can go through mud and to maximize your till. When you're going in a circle you want wider tires. Rubber has an increasing spring rate. So when barreling around a turn, the rubber actually stiffens.Sonreir said:Only to an extent, and it also depends on your surface. There's a reason tractor tires are narrow (and it isn't only so they don't run crops over).