The hard fighting Shimano Thunnus CI4
Thunnus, the genus or name for the hard fighting Tuna; or in this case a heavy duty all metal body spinning reel with our reowned Baitrunner function. Everything about this reel has been built extra tough for heavy duty saltwater use. The Thunnus CI4 features a full metal jacket construction, with an aluminium frame, rotor, side-plate and Cold Forged Spool. This construction not only makes the Thunnus CI4 extremely tough, but it also helps resists flex under pressure and keeps all the internal components in perfect alignment to maximize cranking efficiency and power. The Baitrunner system allows you to set a secondary drag to allow finicky fishes to “run” with the bait without spitting out the hook. The Thunnus CI4 is equipped with ARB to resist corrosion and it also comes with Fluidrive drive train, dyna balance rotor balancing system, Power Roller II and a waterproof drag system for all your saltwater battles. So the next time you pitch a livebait into a rampaging school of tuna, be sure you are equipped with one of the best Shimano Offshore Spinning Reels a Thunnus CI4 reel.
Features: Thunnus CI4
- Lightweight CI4 Frame and Rotor (AL on 12000)

- Aluminum Sideplate
- Paladin Gear Durability Enhancement
- Propulsion Line Management System: Propulsion Spool Lip, SR One-Piece Bail Wire, Power Roller III. Redesigned Bail Trip, S-Arm Cam
- Varispeed Oscillation
- S-Concept, S-Rotor, S-Arm Cam, Direct Drive Mechanism (Thread-In Handle Attachment), Oversized Septon Grips for Power and Comfort, WP Drag (Waterproof Drag)
- Machined Aluminum Handle
- Dartainium II Drag Washers (Cross Carbon)
- Repairable Clicker
- S A-RB (Shielded A-RB) Ball Bearings
- Super Stopper II Anti-Reverse
- Dyna-Balance
- Floating Shaft
- Fluidrive II Gearing
- Approved for use in Saltwater
- Rated for use with Mono, Fluorocarbon and PowerPro lines
Shimano is well known for their excellence in gearing and this is evident with the Thunnus CI4 as well. The Paladin Gear Durability Enhancement uses a cold forged aluminium drive gear with a hardened brass pinion gear. This is said to make that out-of-the-box smoothness last much longer than reels with conventional gearing; even those that use an all-stainless steel drive-train.
If you’re in need of a threadline reel that you can freespool baits to hard fighting, long running pelagics we recommend you have a serious look at Shimano’s Thunnus CI4 range.
Tags: Shimano Thunnus CI4, Spinning Reel, Spinning Reels, Tuna


