Charlie says... The only real touring bike gets disc brakes... great.
Sometimes 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. When designing the Disc Trucker we started with a brand new set of rear dropouts which place the caliper mount between the chain and seatstays, providing uncompromising clearance for a rack and fender. Cable/hose routing via our own Trip Guides runs along the downtube. Like the standard LHT, the Disc Trucker is available as a frameset and as a complete bike, with 26" wheels in 42-62cm frame sizes, and with 700c wheels in 56-62cm, the Disc Trucker will also be available in a 64cm, 700c wheel only. Most of the components on the complete bike are the same as the standard LHT, but a couple things are different. We chose Avid BB7 cable operated brakes for their proven reliability and ease of service, and Shimano XT M756 hubs with 6-hole rotor mounts. These hubs are durable and easy to maintain.
26" wheels available in sizes: 42, 46, 50-62cm completes and framesets
700c wheels available in sizes: 56-64cm framesets
Sizes: 26" wheel 42, 46, 50-62cm; 700c wheel 56-64cm (frame only in 64cm)
Tubing: 100% Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded
Rear dropouts: Vertical, 135mm O.L.D.
Brake compatibility: 51mm disc calipers (160mm rotor only)
Braze-ons: Upper bosses and dropout eyelets for racks front and rear, fender eyelets, pump peg, downtube lever bosses, three sets of H2O cage bosses
Seatpost diameter: 27.2mm
Seatpost clamp: 30.0mm (Surly stainless included)
Headset/Steertube: 1-1/8" threadless
Front derailleur clamp: 28.6mm (bottom pull)
Bottom bracket shell: 68mm wide, threaded standard English (1.37" x 24t)
Chainring clearance: 42/53t double, 38/52/56t triple
Tire clearance: 26": 2.1" with or without fenders; 700c: 42mm with fenders, 45mm without fenders. Individual tire and rim combos affect tire clearance
Fork: 4130 CroMoly, lugged and brazed. Proprietary sloping crown with threaded eyelets, tapered curved blades with mid-blade rack eyelets, dual dropout eyelets