A stent delivery system comprising: a catheter body (110, 2) having an inner lumen and a proximal end and a distal end; a stent member (120, 1) having an inner lumen and a proximal end releasably coupled with the distal end of the catheter body; an inner member (160, 12) disposed in the inner lumen of the catheter body and extending into the inner lumen of the stent member to concentrically align the catheter body and the stent member, the inner member forming an interference fit with the catheter body and the stent member for coupling the catheter body and the stent member; a lock pull wire (140, 18) extending through the inner lumen of the catheter body and into the inner lumen of the stent member; and a tether (130, 11) extending through the inner lumen of the catheter body, then out of a lateral port of the catheter body near the distal end of the catheter body, then along outer surfaces of the catheter body and the stent member, and a loop formed by the tether extending into a lateral port of the stent member into the inner lumen of the stent member, wherein at least a portion of the lock pull wire (140,18) extends through the loop within the inner lumen of the stent member, thereby securing the stent member to the catheter body, wherein the tether has a first end and a second end, the tether extending proximally toward both the first and second ends and the proximal end of the catheter body, and wherein retraction of the lock pull wire from the loop within the the inner lumen of the stent member and retraction of the inner member from the inner lumen of the stent member decouples the stent member and the catheter body such that the stent member is released from the catheter body. a catheter body (110, 2) having an inner lumen and a proximal end and a distal end; a stent member (120, 1) having an inner lumen and a proximal end releasably coupled with the distal end of the catheter body; an inner member (160, 12) disposed in the inner lumen of the catheter body and extending into the inner lumen of the stent member to concentrically align the catheter body and the stent member, the inner member forming an interference fit with the catheter body and the stent member for coupling the catheter body and the stent member; a lock pull wire (140, 18) extending through the inner lumen of the catheter body and into the inner lumen of the stent member; and a tether (130, 11) extending through the inner lumen of the catheter body, then out of a lateral port of the catheter body near the distal end of the catheter body, then along outer surfaces of the catheter body and the stent member, and a loop formed by the tether extending into a lateral port of the stent member into the inner lumen of the stent member, wherein at least a portion of the lock pull wire (140,18) extends through the loop within the inner lumen of the stent member, thereby securing the stent member to the catheter body, wherein the tether has a first end and a second end, the tether extending proximally toward both the first and second ends and the proximal end of the catheter body, and wherein retraction of the lock pull wire from the loop within the the inner lumen of the stent member and retraction of the inner member from the inner lumen of the stent member decouples the stent member and the catheter body such that the stent member is released from the catheter body.