Tryndamere Runes explained
There's one set of runes for Tryndamere on patch 13.24 that is the clear favorite for LoL players and pros alike. The best Tryndamere rune paths on the position 
Top are 
Precision as the primary path and 
Resolve as the secondary path with a pick rate of 99%. Besides picking runes on Tryndamere you should learn how to play Tryndamere and if you are interested in pro matches take a look on how a pro builds Tryndamere. If you want to discuss 
Tryndamere then you should visit the champion subreddit.
Tryndamere runes from primary path
Precision improves attack and sustained damage on Tryndamere troughout the match. Most of high elo players – and our LoL pros in the the major regions – have agreed that 
Lethal Tempo is the best keystone rune to run on Tryndamere. This keystone rune gives Tryndamere a great head start in team fights and allows to put out more damage in that time window. Other primary runes on Tryndamere are 
Triumph, 
Legend: Alacrity and 
Last Stand.
Triumph restores on Tryndamere a part of missing health and award bonus gold, if a champion is killed. Legend: Alacrity grants additional attack speed to Tryndamere. With Last Stand you deal more damage while you are at low health.
Tryndamere runes from secondary path
When it comes to your secondary path, most Tryndamere players prefer to go with Resolve. Resolve empowers the survivability of Tryndamere and increases the tankiness. On the Resolve path, the best runes for Tryndamere are 
Unflinching and 
Second Wind.
Unflinching inceases Tryndamere tenacity based on your missing health. Second Wind powers up your sustainablity in lane by healing after taking damage from an enemy champion.
FAQ for Tryndamere Runes
Which is the best keystone rune on Tryndamere?
The best keystone rune on Tryndamere is Lethal Tempo. This Tryndamere runes setup is then referred as Tryndamere Lethal Tempo.
What runes does Tryndamere use?
Runes from the paths Precision and Resolve are the most used runes on Tryndamere. For the exact pick rates of Tryndamere runes used, you have to study the rune distribution presented.