Static coefficient of friction is 1.6 between rubber and steel. Let's say you put a steel ball on a rubber incline at 45 degrees. Friction is more than gravity so it can't accelerate transitionally down the ramp. But there's clearly torque by friction * radius around the center of mass, so it has an angular acceleration. Also, it has to be nonslip motion because slipping only occurs with low coefficient of friction. However, this is a contradiction. How do you resolve this?
Think about a rectangular object on an inclined plane. If there is enough friction it won't slip down. But it will topple when its centre of mass is moved past the pivot point. Your ball is effectively a many-sided polygon that is toppling over its edges. Think about where the centre of mass of a circle is compared to its point of contact with the plane. You will find that there is a turning effect around that point of contact.
Note also that the coefficient only helps us find the maximum possible value of friction. Often friction is less than that value. Consider the situation with an object resting on a horizontal surface. There could be friction up to the limiting value, but if I'm not providing any sideways force, the friction will be zero.