History of L4, L5 bulges. On road bike for 30 min & both feet tingling bad! Getting new MRI, but which discs cause tingling in both feet at same time?

Several can. Tingling in both feet can suggest that the lumbar nerves are being irritated or compressed on the left and right side. A disc bulge/herniation or stenosis (narrowing) of the nerve canals on both sides of the spine can cause symptoms in both feet. Radiation to the feet often means L4-L5 or L5-S1. If I can help, then join my care team & virtual practice at www.healthtap.com/dr-clarkeholmes.