The Ergo 4 Carbon is a high-end competition shoe by Sidi featuring multiple adjustment possibilities and high-quality workmanship. The Tecno-3 System provides a customized and secure fit while the Twelve Carbon Composite outsole ensures excellent power transmission. The upper is a high quality Tech Pro Nylon Mesh microfiber. It is breathable and regulates temperature and thanks to its surface finish it is dirt-repellent.
Soft Instep 3 System: The anatomical and comfortable strap, placed on the top of the foot and coupled with a soft and thermo-formed material, will increase comfort and performance. It distributes pressure evenly over the arch area, adjustable from both sides to achieve the perfect center position. The system eliminates the need for the High Instep Extender. The Soft Instep Closure System is serviceable and replaceable
Tecno-3 System: dials in fit, adapting the upper to the shape of the foot for a customized fit. To open the mechanism simply press the two buttons on the sides of the turn-lock fastener, pull it outwards and release the nylon loop from the cable holder. To close the mechanism put the nylon loop on the cable holder and turn the turn-lock fastener until the shoe fits properly. The Tecno-3 System allows a micrometric adjustment by alternately pushing on the buttons. Like most SIDI small parts, the TECNO-3 BUCKLE is serviceable and replaceable.
The high security Velcro strap features integrated locking polymer teeth, that engage onto each other when the strap is closed. That makes the closure more secure and the strap becomes unmovable.
The adjustable heel retention device reinforces the top of the heel cup and improves the fit by closing the back of the shoe securely around the rider’s ankle. The heel retention device tightens the top of the heel cup so that it doesn’t side-out during steep climbs or sprints. It can be adjusted with two small screws that work independently from each other. For a custom adjustment turn the screw towards the + sign to tighten the heel retention device and towards the – sign to open it.
The reinforced heel keeps the foot in a optimal position and avoids the shoe being deformed by extreme performance or prolonged pressure.
Twelve Carbon Composite Sole: The carbon-reinforced nylon outsole with an insert of carbon doesn’t absorb water and doesn’t lose rigidity in hot or humid weather or as it ages. It provides an excellent power transmission and is a lightweight and stiff sole.