While a champion can achieve an extremely high tenacity stacking bonus, the maximum reduction in CC from tenacity alone is capped. With this LoL tenacity cap, there is currently no benefit to obtaining a tenacity stack of more than +90%.
Also question is, does tenacity have a cap LoL?
The biggest amount of tenacity you can obtain is 98.
Furthermore, what does tenacity reduce? Crowd control reduction, or tenacity, reduces the duration of crowd control effects. It affects most crowd control effects, but it does not affect displacements, suppression, and stasis. The stat is the percentage that the effect duration is reduced and is calculated at the time of application.
Besides, does legend tenacity stack with unflinching?
Most champions can realistically get 87.4% tenacity with the new Unflinching secondary rune. If you take Unflinching (get below 30% HP) and Legend: Tenacity (fully stacked), then build Sterak's Gage, Merc Treads, and an Elixir of Iron, you can gain 87.4% tenacity for 8 seconds (duration of steraks fury).
Does legend tenacity stack with Merc treads?
Notes. The flat movement speed bonus of Boots of Speed and everything that it builds into is unique and thus does not stack with other boots. Mercury's Treads' tenacity stacks multiplicatively with other sources of tenacity.