A good cross country mountain bike needs to check off a long list of requirements it needs to be light stiff capable of racing and forgiving enough to ride all day long with friends the kahuna dl with its race light aluminum frame rockshox fork 1x drivetrain and roll over everything 29 inch wheels places a check mark in all the boxesand then some frame material kona race light 6061 aluminum custom formed wheel size 29 wheels wtb sx23 front suspension 100mm fork rockshox r