Surly Disc Trucker ForkSometimes a combination of load, climate and terrain demands a bit more braking performance than a rim brake LHT provides. That's where the Disc Trucker comes in. It's a Long Haul Trucker with 51mm IS caliper mounts instead of rim brake mounts on the frame and newly redesigned fork.4130 CroMoly, lugged and brazed. Proprietary sloping crown with threaded eyelets, tapered curved blades with mid-blade rack eyelets, dual dropout eyelets Tyre clearance 26": 2.1" with or without mudguards; 700c: 42mm with mudguards, 45mm without. Individual tyre and rim combos affect tyre clearance 26" or 700c wheel optionsBlack