Last year, Sidi introduced the Wire as their flagship road shoe, replacing the Ergo3. Sighted in prototype form on the feet of riders such as Peter Sagan, the Wire is probably the most dramatic revision to the Sidi top-end in a decade, replacing the three fasteners of the Ergo series with just two twist ratchet/tension cord units that Sidi calls Tecno 3 system. The shoe is also offered with a choice of two carbon soles. The Vent sole is an all-new carbon design with vents underneath at the toe and mid-foot while the SP has a Speedplay-specific mount without vents. Since I ride Speedplay Zero pedals, I considered getting the SP, but in the end I chose the Vent because it was available in my size in the Cannondale Team colours.
Sidi always brings solid construction to their product, even if it seems to be laden with a lot of gimmicky devices. I have a 13 yr old pair of Sidi Energy shoes, then the flagship model from the same company. The Energy has a telescoping rod in the arch of the shoe that was designed to allow the rider to “fine tune the stiffness of the sole.” That shoe has held up quite well over time, but that rod in the shoe arch has never produced any noticeable effect. On the other hand, the Wire Vent’s array of features are all genuinely contributing something to the rider.