Ns bikes surge evo frameif you want to go hard in all conditions choose ns bikes surge evo frame its a no nonsense hardtail frame for those who want to switch between freerides weekend dirt jumping or longer all day rides the surge evo frame is strong comfortable and durable to meet all of your versatile riding needs strong and durable crmo hardtail frame with internal cable routingmade from custom butted 4130 crmo the surge evo frame provides superior strength and durability which me