Summon: Chestnut Gelding

Summon: Chestnut Gelding is a skill that allows the summoning of a ride-able Chestnut Gelding mount which runs at a movement speed of 255.

Source
The Chestnut Gelding is learn-able via which was obtainable via pre–ordering the Standard Edition of TERA: The Exiled Realm of Arborea through local stores. As such, this mount is no longer obtainable.