Json Ultimate Leader is primary for streamers and nymphs with a heavier butt section and more power for turnovers with big flies. The leader has maximum strength and abrasion resistance. The leader has 30% maximum elasticity which helps when playing those big fish.
| 7X | 6X | 5X | 4X | 3X | 2X | 1X | 0X | 00X | 01X | |
| FT | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 12 | 12 |
| M | 2,70 | 2,70 | 2,70 | 2,70 | 2,70 | 2,70 | 2,70 | 2,70 |
3,60 |
3,60 |
| LB | 3 | 4 | 5 | 6 |
8 |
10 | 12 | 15 | 18 | 20 |
| -KG | 1,3 | 1,8 | 2,3 | 2,7 | 3,6 | 4,5 | 5,4 | 6,8 | 8,1 | 9,1 |
| TIPP MM | 0,11 | 0,13 | 0,15 | 0,17 | 0,20 | 0,23 | 0,26 | 0,28 | 0,31 | 0,34 |
| BUTT MM | 0,53 | 0,53 | 0,55 | 0,58 | 0,60 | 0,63 | 0,63 | 0,66 | 0,66 | 0,66 |