Regular: The Max is the latest and strongest version of the out-front K-EDGE mount. Designed to fit 31.8mm round bars, it's ideal for small to medium-sized computers. A Go-Pro style interface can be added to lock your light or camera underneath your computer and out of sight. We’ve refined this mount with a solid one piece arm and thin upper clamp. Combo: The Max Combo shares all the strength and design features of the regular Max mount with the addition of a Go-Pro style interface to securely hold your light or camera underneath. Specifications CNC Machined Aluminum Replaceable computer insert protects computer tabs Anodized Black with laser-etched logos Lifetime Guarantee against material or manufacture defects - damage due to abuse or crashing excluded Weight: 45 g, Combo 50 gDimensions: 11 x 20 x 4 cmClamp Size: 31.8 Compatibility Wahoo BOLT (Versions 1 &2) and MINI Most Garmin Edge, Forerunner, and Touring models, including 830, 820, 530, 520, 510, 500, 130, 25, 20 (Edge 1000, 1030, 1040, fit on the longer XL mount) Combo (GoPro style light/camera interface) adapter compatible Payload Capacity- Top – 123g (example: Wahoo Roam) / Bottom 242g (example: NiteRider 1800 or Cycliq FLY12 light/camera) SKU: K13-4500-31.8-BLK (Garmin Regular)SKU: K13-4500C-31.8-BLK (Garmin Combo)SKU: K13-4500W-31.8-BLK (Wahoo Regular)SKU: K13-4500WC-31.8-BLK (Wahoo Combo)