I have always used my training shoes to run races. However I was looking thru the Road rRunner Sports catalog where they list the weights of all the shoes. My shoes (Nike Pegasus weigh 12.6 oz.) That is about average. The racing flats/light trainers they list at almost 3 oz less. Who wears racing shoes and do you think they offer more than a psychological edge. I'm thinking that 3 oz x alot of steps might make a difference even in a short race.