Originally Posted by
StanSeven
I have both - spd on my cross bike and tried them before on a road bike. SPDs are okay for just riding along but they aren't as good for all out efforts like sprinting and standing on all out climbing. If you think about one contact area is the size of a fat grape or walnut and the other close to a tennis ball, it all makes more sense.
I'm not going to argue with your opinion, but when you realize that bike soles are made out of very hard nylon, or in the more expensive versions rock hard carbon fiber, it doesn't really matter - your foot is in contact with a large stiff board that makes your cleat size irrelevant.
Just saying I've seen plenty of people say either one - some swear they like their road clipless better, others have tried it and say it makes no difference to them. Me, my road shoes are worse, but that's a result of the shoe not fitting my foot as well.
I said "highly debated" because it's...highly debated. Just saying'. :-)