Preamble is a hard-boiled, straightforward steel bike built for comfort, durability, and general buffoonery on mostly paved surfaces.

KEY FEATURES

100% Surly Chromoly steel frame and fork
Five easy-to-understand frame sizes to fit nearly every size of rider
Clearance for 650b x 41mm tires (XS/SM) and 700c x 41mm tires (MD-XL) (with or without fenders)

Frame Specifications
Frame Construction 100% Surly Chromoly steel, Natch tubing, double-butted main triangle, TIG welded, E.D. coated
Fork Construction 100% Surly Chromoly Steel, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated
Rear Dropouts Vertical
Rear Hub Spacing "Gnot-Boost" 138mm; 10 x 135mm or 10 x 141mm
Front Hub Spacing 10 x 100mm
Front & Rear Brakes Front Disc - 51mm I.S. (203mm max rotor); Rear Disc - 51mm I.S. (180mm max rotor)
Headset (S.H.I.S.) EC34/30
Seatpost Ø27.2mm
Max Chainring 1x: 42t max; 2x: 46/36t max
Bottom Bracket 68mm BSA, Threaded
Wheel/Tire Sizes XS-SM: 650b x 35; MD-XL: 700c x 35
Tire Clearance Frame XS-SM: 650b x 41 (with or without fenders); MD-XL: 700c x 41 (with or without fenders)
Tire Clearance Fork XS-SM: 650b x 42 (with or without fenders); MD-XL: 700c x 42 (with or without fenders)
Rigid Fork Spec XS-SM: 380 x 47mm; MD-XL: 400 x 44mm

Component spec

Headset Cane Creek 40 OR FSA Orbit MX
Seatpost Kalloy 27.2 x 300mm, no offset
Stem TranzX JD-ST123A
Grips/Bar TapeVelo Black Cork
Saddle WTB Volt Medium
Handlebar TranzX JD-RA48A

Drivetrain
Rear Derailleur Shimano CUES U6000 GS, Silver
Cassette Shimano CUES LG400, 11-48t, 10spd, Silver
Chain Shimano LG500
Crankset Shimano CUES U6030, 40T, Silver
Shifter Shimano CUES U3030, Silver
Brake Levers Shimano CUES U3030, Silver
Brake Calipers Shimano RS305, Mechanical
Bottom Bracket Shimano RS501 BSA
Rotors Shimano RT26, 160/160, 6-Bolt

Wheels
Tires Teravail Washburn 650b x 35, 30tpi, Wire Bead (XS-SM)Teravail Washburn 700c x 35, 30tpi, Wire Bead (MD-XL)
Front Hub Novatec QR x 100mm, 32h, 6-Bolt
Rear Hub Novatec QR x 141mm, 32h, 6-Bolt
Spoke 14g Black
Rim Shining DB-21, 32h
Weight Complete Bike 12.3kg (Medium)

Geometry chart HERE

*Specifications are subject to change without notice

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Surly Preamble Drop Bar 2026