Sidi SRS (Pre Carbon) Dragon Soles Size 41 44 Color Black/Red/Yellow

In 1999, SIDI revolutionized mountain bike shoe design with the Sole Replacement System SRS, allowing mountain bikers to replace the most wear heavy part of the shoe the sole. SIDI's global patent on the SRS sole means SIDI is the exclusive producer of MTB shoes with replaceable tread. The SIDI SRS sole allows SIDI to maximize both traction and durability. Since the tread is replaceable, SIDI can use an aggressive, softer durometer in the tread for increased traction in slippery conditions. Replacement tread blocks for pre Carbon Dragons Also fits Spiders tread compound is harder than the original Spider compound Also fits earlier non Carbon SRS Soles Size 41 44 Color BlackRedYellow