The Facts: The Shimano Trinidad reels feature one piece forged aluminum frames and 6 A-RB stainless steel ball bearings. The TN40 and TN50 are larger models that feature a 4.9:1 gear ratio for maximum crankin' power. The TN16N and TN40N, known as "Narrow Specials," are built on a unique narrow frame that virtually eliminates wobble during the retrieve and offers more efficient line pickup than the shorter, wider spool reels. The Tiagras also come equipped with Super Stopper anti-reverse with Assist Stopper backup, Dartainium drag, and an audible clicker with 14 different tension settings.