LF is "Long Fade". Orion Long Fade. You might want to start out with a current run S (Sirius, which is just Star plastic) OLF. they are easy to get, and will start showing high speed turn pretty quickly. If you then decide you want more beef and longer wear, start thinking about Q plastic (which is just Champion plastic).
OLFs and PDs are my most used drivers. Turn with fade and straight to fade. Both use the Firebird wing/rim.
