Adrenalin TSN-12: 6.2 : 1 ratio for a speedy retreat, the 3.9 : 1 ratio will be turned on when fighting big fish or retrieving heavy montages. Adrenalin TSN-14: Great for roach and ling fishing with natural baits and a great line capacity. Features: 6 ball bearings, 1 needle bearing, one-piece aluminium frame, carbon/stainless steel brake discs, freerunning system.