This is what I do too, comfy pair of slip-ons at work which stay there in my locker.SPDs. Since the shoes I wear at work aren't fit for cycling in, it makes sense. So work shoes stay at work, home shoes stay at home, and SPDs go between the two.
Because I have to wear trainers if using the flat side, and the softness of the soles definately impacts on the transfer of power through the pedal compared to hard-soled SPD shoes. Over the course of 20 miles of riding, often into a stiff breeze on my route, I can definately feel the difference.In what way are flats more effort?
Have to? What happens if you don't? Do the cycle shoe police come around and smash your feet up with hammers?Because I have to wear trainers if using the flat side, and the softness of the soles definately impacts on the transfer of power through the pedal compared to hard-soled SPD shoes. Over the course of 20 miles of riding, often into a stiff breeze on my route, I can definately feel the difference.