From Shimano: "The number one choice of serious offshore anglers and captains, Tiagra reels feature an innovative hydrothermal drag system that virtually eliminates the drag setting variances that affect today's big-game reels. The Tiagra series offers the strength and reliability of a solid aluminum frame, making these reels ideal for fishing with heavier line for giant fish. These reels are also perfectly suited for long-range fishing."

HEG: HEG consists of not only the gears, but also the frame, setplate, and handle-side sideplate. First we increased the size of the drive gear and the pinion gear to offer increased leverage and power. By using a one-piece frame that incorporates the setplate and adding a one-piece stamped sideplate, we have eliminated flex in the drive train that causes gears to bind under pressure.

A-RB BAITCASTING: A-RB stainless-steel ball bearings are specially treated to drastically increase the corrosion resistance of the bearing. These bearings will last at least 10 times longer than standard stainless-steel ball bearings in high salinity environments.

CROSS CARBON DRAG BAITCASTING: The Cross Carbon Drag material provides a wider range of drag settings compared to traditional drag materials. The Cross Carbon Drag provides the smoothest Shimano drag performance ever while providing anglers with increased durability.

HAGANE BODY BAITCASTING: The HAGANE Body is a metal reel body with high rigidity. The body rigidity and impact resistance virtually eliminates body flexing on the reel while fighting fish. The result transforms the angler's actions directly into cranking power, increasing efficiency through strength.

SPECIFICATIONS

PRODUCT CODE WEIGHT POWERPRO LINE CAPACITY GEAR RATIO MAX DRAG MONO LINE CAPACITY RETRIEVE LINE RETRIEVE PER CRANK LOWER GEAR RATIO LOWER LINE RETRIEVE PER CRANK BEARINGS
TI30WLRSA
 55.6
 65/1435, 80/1180, 100/865
 3.9:1
 35
 30/935, 50/570
 Right
 41
 1.7:1
 18
 4
TI50A
 83.4
 80/1135, 100/930, 150/865
 3.1:1
 26
 50/600
 Right
 37
 1.3:1
 15
 4
TI20A
 49.7
 50/1225, 65/720, 80/525
 3.9:1
 26
 20/690, 30/470
 Right
 41
 1.7:1
 18
 4
TI50WLRSA
 86.2
 80/1575, 100/1235, 150/1180
 3.1:1
 40
 80/550
 Right
 37
 1.3:1
 15
 4
TI50WA
 86.2
 80/1575, 100/1235, 150/1180
 3.1:1
 26
 50/850
 Right
 37
 1.3:1
 15
 4
TI130A
 174.1
 150/3315, 200/2770, 250/1955
 2.1:1
 88
 130/1000
 Right
 39
 1.15:1
 22
 6
TI16
 37.4
 50/1210, 65/680, 80/520
 3.9:1
 31
 16/980, 20/670, 30/430
 Right
 36
 1.7:1
 16
 6
TI30A
 52.4
 50/1805, 65/1065, 80/770
 3.9:1
 35
 30/700, 50/420
 Right
 41
 1.7:1
 18
 4
TI80WA
 115.2
 100/2445, 150/2365, 200/1920
 2.5:1
 40
 80/950
 Right
 37
 1.3:1
 15
 4