Scientifically redesigned by Shimano experts, the 2020 Metanium boasts a never-before-seen magnesium CoreSolid Body for enhanced durability, rigidity, and sensitivity. The addition of a new CI4+ Star Drag further reduces weight, while the MGL III spool decreases spool inertia by 17%, and the SVS Infinity Braking system allows for customizable and precise casting distances with any lure size. The Metanium is also equipped with a brass MicroModule main gear for long-term smoothness and Silent Tune technology to minimize spool bearing vibration and increase casting distance and feel.
| Model | Retrieve | Gear Ratio | Weight | Line Cap. | Bearings |
| METMGL150B | Right | 6.2:1 | 6.3 | 10/120, 12/110 | 10S A-RB + 1S A-RB |
| METMGL150HGB | Right | 7.1:1 | 6.3 | 10/120, 12/110 | 10S A-RB + 1S A-RB |
| METMGL150XGB | Right | 8.1:1 | 6.5 | 10/120, 12/110 | 10S A-RB + 1S A-RB |
| METMGL151HGB | Left | 7.1:1 | 6.3 | 10/120, 12/110 | 10S A-RB + 1S A-RB |
Max Drag: 11lb