If your reasoning goes like this that since single yarn strength of airjet/ rotor or friction yarn is less than that of ring yarn so fabrics made from ring yarn will be stronger than those made from airjet/rotor or friction yarn, than you are in for a Surprise.
The fabric made from ring yarn will be weaker than those made from the other yarn as mentioned above.
A study done by scholars of IIT and Behrampur University suggests this conclusion.
The presence of wrapper fibers inside the rotor/airjet/friction yarns increase the frictional force inside the fabric and therefore resist rupture, among other factors such as the rupture of wrapper fibers inside the fabric for these yarns are more than ring yarn, which enhance further frictional force.
You can read the full study here.
