01Sinker·Sinker Basic Concept

A sinker (sinker) provides weight in the water for the fishing rig and secures the lure or bait at the desired depth and position.

Selecting the appropriate weight and shape based on water density and flow, and the target species’ habitat layer, optimizes bite transmission.

PE (ultra‑high‑molecular‑weight polyethylene) line is specified by “size” (denier).

Size 1 is about 0.165 mm in diameter, size 1.5 is 0.205 mm, and size 2 is 0.235 mm as typical values, though actual diameters vary by manufacturer.

The larger the size, the weight and tensile strength increase proportionally, roughly “size × 10 lb” as an estimate of breaking strength.

Compared with nylon or carbon line, braided line has only about one‑third to one‑quarter the diameter yet 4–7 times the tensile strength, resulting in low drag and virtually no stretch, which enhances bite transmission sensitivity.

This is the primary reason braided line is used as the main line in sea lure and jigging, and the same principle applies to sinkers themselves.

02Main Sinker Types and Uses

① Downshot – a weight‑focused‑bottom design that lifts the entire line vertically.

With a low center of gravity, it is advantageous for bottom‑dwelling species (e.g., sea bass·olive flounder) and performs best at depths of 30–80 m and water temperatures of 12–20 °C.

② Texas – a ‘ring‑type’ sinker with the weight positioned forward on the line, allowing the line to move naturally with the current.

At depths of 20–100 m and temperatures of 10–22 °C, it offers good passage through underwater obstacles (vegetation·rocks) and is suited for rough‑bottom areas.

③ Ring Sinker – a circular ring with weight evenly distributed, pulling the line uniformly and improving bite sensitivity.

When paired with 4‑strand or 8‑strand PE line, casting distance increases noticeably (about +10.5% with 8‑strand).

Downshot sizes
PE 1.0~1.5 (weight 5–12 g)
Texas sizes
PE 1.5~2.0 (weight 12–20 g)
Ring Sinker sizes
PE 2.0~3.0 (weight 20–35 g)

03Practical Application Tips and Cautions

When connecting a sinker to the leader, use a nylon or carbon leader that is 3–5 times the PE size.

For example, with PE size 1.2 (tensile strength about 16 lb), pair a carbon size 5–6 (tensile strength 80–100 lb) to balance shock absorption and strength.

This is also called a ‘shock leader’ and minimizes damage from underwater obstacle friction.

The more strands (cores) a line has, the more its cross‑section approaches a circle, creating a smoother surface.

Switching from 4‑strand to 8‑strand at the same size increases casting distance by an average of 10.5 %, and moving from 8‑strand to 12‑strand adds another 4.7 %.

Therefore, choose 8‑strand when casting distance and line pass‑through are critical, and 4‑strand for rough‑bottom or heavy‑vegetation areas.

Knots reduce junction strength by about 40 %, so use a knot‑free ‘snap’ connection whenever possible.

If a knot is unavoidable, repeat a ‘pinch’ knot three or more times and verify safety with a strength test (e.g., a pull of at least 5 lb) after tying.

⚠ Common Mistakes
  1. Relying solely on size markings and ignoring diameter – Actual diameter varies by manufacturer.
  2. Connecting the leader with the same PE size – insufficient shock absorption increases line breakage risk.
  3. Overusing knots – reduced junction strength leads to bite loss.
Coastal
Depth 10–30 m
10–30m
Year‑round
Offshore
Depth 30–80 m
30–80m
Year‑round
Deep sea
Depth 80–150 m
80–150m
Year‑round
⏱ Golden Time
Sunset ±2 h
Currents weaken and light diminishes, prompting increased fish activity
Dawn 03–05 h
Stable water temperature concentrates predatory species in shallow depths
Day 10–12 h
Rising surface temperature triggers activity of shallow‑water species