Nothing More is Needed. Nothing Less Will Do. The challenge was thus: Build a serious steel bike and give it only the attributes that matter most. Make it quick and comfortable on pavement, as well as confident and compliant on degraded surfaces. What the Enginerds put forth is Preamble, a pavement and gravel utility worker that proves you don’t need to cut corners or clip coupons to make a more affordable steel bike. You just need to keep shit simple. Preamble can run racks and fenders and carry a couple water bottles. Surly was raised on stealing basic cable, after all. Smooth and efficient on asphalt, Preamble’s double-butted main triangle provides a resplendent ride feel and withstands abuse from life’s inevitable potholes. Make it your own with flat bars, drop bars, a basket, or bags. On the road to steel euphoria, Preamble is the gateway drug. Let facts be submitted to a candid world: Offered in flat-bar and drop-bar configurations Easy T-Shirt sizing to fit nearly every rider (XS,S,M,L,XL) Sloping top tubes on XS and Small frames for improved standover and comfort To offer the best rider experience for every frame size, XS and S frames get 650b wheelsets while M–XL get 700c Custom-cast single-position vertical dropout Frameset Frame Surly Preamble, 100% Chromoly steel tubing, E.D. coated Fork Surly Preamble, 100% Chromoly steel fork, Disc Only Components Seatpost Clamp Surly Stainless 30.0 Frame Specs Design Wheel/Tire Sizes 650b x 50mm Alternate Wheel/Tire Sizes 700c x 42mm Max Tire Outer Diameter Frame clearance: Size XS-SM: 650b x 41 (w/ or w/o fenders) Size MD-XL: 700c x 41 (w/ or w/o fenders) Fork clearance: 650b: 650b x 42mm (w/ or w/o fenders) 700c: 700c x 42mm (w/ or w/o fenders) Frame Construction 100% Surly Chromoly steel, Natch tubing, double-butted main triangle, TIG welded, E.D. coated Fork Construction 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated Rear Spacing "Gnot-Boost" 138mm Rear Brake (Rotor) Disc - 51mm I.S. (180mm max rotor) Front Brake (Rotor) Disc - 51mm I.S. (203mm max rotor) Headset - Upper EC34/28.6 Headset - Lower EC34/30 Front Spacing 10 x 100mm Crankset (Max Ring) 1x (47CL): 42T 2x (47CL): 46/36T
