Rammus Runes explained
There's one set of runes for Rammus on patch 15.13 that is the clear favorite for LoL players and pros alike. The best Rammus rune paths on the position 
Jungle are 
Resolve as the primary path and 
Precision as the secondary path with a pick rate of 71%. Besides picking runes on Rammus you should learn how to play Rammus and if you are interested in pro matches take a look on how a pro builds Rammus. If you want to discuss 
Rammus then you should visit the champion subreddit.
Rammus runes from primary path
Resolve empowers the survivability of Rammus and increases the tankiness. Most of high elo players – and our LoL pros in the the major regions – have agreed that 
Aftershock is the best keystone rune to run on Rammus. This keystone rune bulks you up, increasing both armour and magic resistance, once you immobilized a champion. Aftershock synergises both with the sheer amount of crowd control Rammus possesses and the need to be tanky as soon as you engage. Other primary runes on Rammus are 
Font of Life, 
Conditioning and 
Overgrowth.
Font of Life provides your teammates with more sustain by healing them whenever they attack a champion whose movement you've recently impaired. Conditioning powers up Rammus tankiness after the laning phase. Overgrowth increases your maximum amount of health.
Rammus runes from secondary path
When it comes to your secondary path, most Rammus players prefer to go with Precision. Precision improves attack and sustained damage on Rammus troughout the match. On the Precision path, the best runes for Rammus are 
Legend: Alacrity and 
Triumph.
Legend: Alacrity grants additional attack speed to Rammus. Triumph restores on Rammus a part of missing health and award bonus gold, if a champion is killed.
FAQ for Rammus Runes
Which is the best keystone rune on Rammus?
The best keystone rune on Rammus is Aftershock. This Rammus runes setup is then referred as Rammus Aftershock.
What runes does Rammus use?
Runes from the paths Resolve and Precision are the most used runes on Rammus. For the exact pick rates of Rammus runes used, you have to study the rune distribution presented.