Futures AM2 Alpha Thruster Surfboard Fins - Large The AM2 Alpha, designed by legendary shaper Al Merrick of Channel Islands Surfboards, is a large size thruster in the Rake template category. Featuring a balanced flex pattern, this fin’s wider base provides increased drive through turns, making it ideal for high-performance surfing. The centre fin is smaller than the side fins for increased manoeuvrability. Template Category | Rake (drawn-out, control, drive) Construction | Alpha Ride Number | Balanced – 5.8 Size | Large (180 lbs) Side FinsCenter Fin Area 15.98 15.32 Height 4.73 4.49 Base 4.64 4.63 Foil FLAT SYMM