Trundle Runes explained
There's one set of runes for Trundle on patch 15.4 that is the clear favorite for LoL players and pros alike. The best Trundle rune paths on the position 
Top are 
Precision as the primary path and 
Resolve as the secondary path with a pick rate of 86%. Besides picking runes on Trundle you should learn how to play Trundle and if you are interested in pro matches take a look on how a pro builds Trundle. If you want to discuss 
Trundle then you should visit the champion subreddit.
Trundle runes from primary path
Precision improves attack and sustained damage on Trundle 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 Trundle. This keystone rune gives Trundle a great head start in team fights and allows to put out more damage in that time window. Other primary runes on Trundle are 
Triumph, 
Legend: Alacrity and 
Last Stand.
Triumph restores on Trundle a part of missing health and award bonus gold, if a champion is killed. Legend: Alacrity grants additional attack speed to Trundle. With Last Stand you deal more damage while you are at low health.
Trundle runes from secondary path
When it comes to your secondary path, most Trundle players prefer to go with Resolve. Resolve empowers the survivability of Trundle and increases the tankiness. On the Resolve path, the best runes for Trundle are Demolish and Bone Plating.
Demolish increases your pressure on the enemy turrets. This rune will help you to punish bad roams or backtimings of your lane opponent. Bone Plating make Trundle overall tankier, by decreasing the amount of poke damage in the early game.
FAQ for Trundle Runes
Which is the best keystone rune on Trundle?
The best keystone rune on Trundle is Lethal Tempo. This Trundle runes setup is then referred as Trundle Lethal Tempo.
What runes does Trundle use?
Runes from the paths Precision and Resolve are the most used runes on Trundle. For the exact pick rates of Trundle runes used, you have to study the rune distribution presented.