Rockshox xc 30 tk coil forks 9mm qrevery mountain biker can benefit from the rockshox technologies and performance features when choosing an xc 30 the xc series is a high value line of entry level forks and are stiff performance oriented and feature a turnkey lockout features material steel upper magnesium lowers 6061 t 6 aluminium crown dampingturnkey lockout springcoil adjustmentsexternal rebound spring adjust preload upper tubes30mm lowers9mm qr disc brake only maxim