Sidi Adjustable Heel Retention Device Description: The Sidi Adjustable Heel Retention Device is designed to provide customizable heel support and stability for select Sidi cycling shoes. With the turn of a couple of screws it is possible to create a fully customized heel cup to prevent heel slipping during intense efforts (like a steep climb or a hard charging sprint to the finish line), while also improving the comfort and fit for a wide range of foot shapes and sizes. Features: Rugged composite construction ensures long useful life while keeping the shoes light weight Two screws on other side of the heel cup allow minute adjustments to dial in comfort, fit, and performance Includes (2) Heel Retention Devices, mounting bolts, and decorative covers Specifications: Color: Anthracite Grey Shoe Compatibility: Sidi Tiger 2S SRS MTB Cycling Shoes | Sidi Drako 2S SRS MTB Cycling Shoes | Sidi Shot 2S Road Cycling Shoes | Sidi Wire 2S Road Cycling Shoes