A traditional-style Porteur rack that mounts securely to mid-blade and crown eyelets of Surly forks, making it compatible with fat bike and 29+ wheels.· Mounts to mid-blade and crown eyelet· Mounting hardware is included· Compatible with Surly forks that use crown mounted braze-ons and mid-blade fork eyelets· Not recommended for use with forks that have single mounting point in the fork crownDisc Brake Compatible: YesMaterial: 4130 CroMoly SteelMaximum Wheel Size (in) : 29+ insPlatform Dimensions: 400mm x 270mmRack Mount Position: HighTube Diameter: 10 mm mmWeight: 860 g gWeight Limit: 13.6kgCompatible Surly forks: Requires crown and mid-blade eyelets. ECR, Troll, World Troller, Ogre, Long Haul Trucker, Disc Trucker, Cross-Check, Straggler, Travelers Check, Big Dummy, Ice Cream Truck, Wednesday, centered Pugsley/Moonlander. When installing on fat forks you may find the need to secure the rack stays to the interior vs exterior. Go with your gut friend. It speaks the truth.