Alias · Leg Locks
Truck ankle lock
Also known as Tren Lock — the canonical term used on this site.
Training background: Descriptive term linking it to the positional origin
Descriptive — ankle lock from truck position
Truck ankle lock is the descriptive name for the tren lock — flagging the truck (crab ride) position from which the ankle-attack is entered.
Etymology. “Truck” specifies the entry position; “ankle lock” attaches the submission category. The compound predominates in coaching vocabulary that emphasises the position-and-attack chain.
Mechanics. The truck-position commits the attacker into the configuration from which the ankle attack closes — the leg control inherent in truck provides the structural anchor.
Cross-reference. “Tren lock” is the canonical name; “Train lock” is the colloquial mis-rendering. Full mechanical coverage on Tren Lock.