A balloon catheter (2) may include a multi-lumen tube (10) having an inflation lumen (20) and a guide wire lumen (22). The multi-lumen tube may include a proximal end (10a) and a distal end (10b) and may terminate at a distal tip. The catheter may include an extension tube (28) extending distally from the distal tip of the multi-lumen tube and a dilatation balloon (8) disposed about the multi-lumen tube and the extension tube. The distal tip of the multi-lumen tube may be under the balloon.
