I have a pair of Diadora Geko shoes. After not too long in the mountains, my feet start to burn (pretty much at the point of contact with the pedal) and my toes tingle and sometimes go numb. (So do my fingertips, for that matter) It seems to be related to how hard I am riding. I have tried loosening the shoe a bit and it seems to help. Its not the end of the world, but it would be nice to have one less distraction...................Can anybody comment? Thanks.