increase friction. carry heavy weights. increase the stopping distance. prevent braking of the bicycle.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Mountain bike tires have large, knob-like treads. These tires are useful on steep slopes because they
Possibilities:
- increase friction.
- carry heavy weights.
- increase the stopping distance.
- prevent braking of the bicycle.

increase friction.