Surly says... Preamble is a hard-boiled steel commuter built for comfort, durability, and buffoonery on pavement and gravel.

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.

Features:

• 100% Surly Chromoly steel frame and fork; double-butted main triangle
• Five frame sizes to fit nearly every size rider (XS, S, M, L, XL), with a slightly sloped top tube on XS and S frames for improved standover and comfort
• To offer the best rider experience for every frame size, XS and S frames take 650b wheelsets while M–XL get 700c
• Custom-cast single-position vertical dropout
• Friendly with 1x and 2x drivetrains
• Mounts for racks, mudguards, and two bottle cages (located on the seat tube and down tube)
• Clearance for 650b x 41mm tyres on XS–S frame sizes (with or without mudguards); 700c x 41mm tyres on M–XL frame sizes (with or without mudguards)
• Colour: Best Buds Green (Yes it is very slightly different to Thorfrost White)

Specification:

• 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, ED coated
• Rear Dropout Configuration: Vertical
• Rear Hub Spacing: "Gnot-Boost" 138mm; 10 x 135mm or 10 x 141mm
• Front Hub Spacing: 10 x 100mm
• Rear Brake: Disc - 51mm I.S. (180mm max rotor)
• Front Brake: Disc - 51mm I.S. (203mm max rotor)
• Headtube: Ø34mm
• Steerer Tube: Ø28.6mm
• Crown Race: 30mm (1-1/8")
• Stock Headset Upper (S.H.I.S): EC34/28.6
• Stock Headset Lower (S.H.I.S): EC34/30
• Seat Collar: Ø30.0mm
• Seatpost: Ø27.2mm
• Front Derailleur (Clamp): High direct mount top-pull (Ø28.6mm), 26mm offset adapter (included) for 135mm rear hub spacing, 29mm offset adapter (not included) for 141mm rear hub spacing
• Max Chainring (CL) [3]: 1x (47CL): 42T, 2x (47CL): 46/36T
• Bottom Bracket: 68mm BSA, threaded
• Tire Clearance Frame [1]/[2]: XS-SM frames: 650b x 41mm (with or without fenders), MD-XL frames: 700c x 41mm (with or without fenders)
• Tire Clearance Fork [1]: XS-SM frames: 650b x 42mm (with or without fenders), MD-XL frames: 700c x 42mm (with or without fenders)
• Bottle Mounts Frame: 2 Standard
• Rack Mounts Frame: Yes
• Rack Mounts Fork: Fork crown and mid-blade rack mounts and fender mounts
• Fender Mounts Frame: Yes
• Fender Mounts Fork: Fork crown and mid-blade rack mounts and fender mounts

Recommended Rider Height:

• XS: 152cm - 165cm
• S: 162cm - 173cm
• M: 170cm - 183cm
• L: 180cm - 191cm
• XL: 188cm - 201cm