Originally Posted by DnvrFox
Running shoes don't have stiff soles to help avoid hot spots and to better transfer power to the pedal.
On long rides, the hot spots become significant for many folks.
This is truly the correct answer. I road for a long time in regular old Pumas and when I finally got a pair of Specialized touring shoes I could kicked myself in the ass for not getting them earlier. I still have those shoes and they are literally about 8 years old so it's a good investment...