- CNC Machined Aluminum - Combo Compatible (580 Add-On sold separately) - WAHOO approved replaceable computer insert protects computer tabs - Anodized Black with laser etched logos - Payload Capacity: Top - 123g / Bottom 242g - Weight: 63g - Mount Type: Clamp 31.8mm - Mount Weight: 53g Compatibly: - All Wahoo Cycling Computers- ROAM, BOLT, ELEMNT, MINI - Combo (GoPro-style light/camera interface) K13-4500-31.8-BLK