this may sound like a dump question, but what exactly do nerf bars do? When do you need them?

 

i beleave they are so if u slip off ur peg the net will catch ur foot so u dont hit the ground

 

keeps other peoples wheels out of harms way and what he said. They can also keep trees from hitting the insides (the tread parts i mean) of your rear tires.

 

and also they stop u from draging your foot on the ground then your boot catches a root and u run over your foot i know from experience get a set of nerf's because if u ever run over your foot or just jump and land your foot on the ground you will wish u had them