Slowman wrote:
Dave, can you tell me what you mean by: "Triathletes have fully accepted flat bottom construction"
Slowman when you started running everything was flat bottom. Then I believe Asics but it might have been Brooks came out with the first midfoot bridge that took weight (typically heavy rubber) out of the middle of the shoe and replaced it with a TPU piece to provide the support. For a good 15-20 years that was the choice construction by brands. Then minimalism came around and as predicted the shoe industry changed by deconstructing many shoes. There was also at the same time a huge push to create better foams and better outsole materials. Nike was the leader in this with Free and Lunar. The Free and Lunar Racer, Lunar Glide (now 6 years in the making) are all flat to the ground shoes. Out of minimalism we were given the Kinvara which was just about the perfect running shoe. So simple in construction yet so dynamic in feel. The dyamic feel came from the design of the midsole working with the natural (or unnatural) surface of the road. During all of this work two guys in France were working on your favorite new brand, Hoka. Yesterday at the race a very large percentage of the athletes were in shoes constructed flat to the ground without the TPU midfoot bridge. Hoka, Saucony Kinvara, Triumph ISO, NB Fresh Foam 980 and Zante, Nike Lunar Glide, Brooks Pure Flow, Glycerin, Ghost, Altra, Asics 33 series Zoot Solana/ali'i and more.
I specifically called this out because I've been doing analysis at running events too. Runners are not as fast at adopting new. They tend to stick to what works until it doesn't work anymore. The top shoes at running events are the Asics GT 2000, Kayano and Nimbus. All exceptionally good shoes but all built with a midfoot bridge.
It is my belief that once you run in a shoe that is flat to the ground you won't want to go back to a shoe built with a midfoot bridge.
Dave Jewell
Free Run Speed