Surly Preamble – Steel Commuter & Gravel Bike

Overview

• Designed as a serious steel bike with only the essentials that matter most.

• Built to be quick and comfortable on pavement, yet confident and compliant on rough or degraded surfaces.

• The Preamble proves that you don’t need to cut corners to create an affordable, high-quality steel ride — just keep it simple.

Features

• Sloping top tubes on XS and Small frames improve standover height and rider comfort.

• Wheel setup by frame size:

  • XS and S frames come with 650b wheelsets.

  • M to XL frames use 700c wheelsets for balanced handling.

• Custom-cast single-position vertical dropouts for reliability and simplicity.

Specifications

• Intended Use: Commuting / Utility / Light Gravel

• Frame Material: Durable 4130 Chromoly Steel

• Fork Material: Steel

• Braking System: Hydraulic Disc Brakes

• Headset Included: Yes

• Headtube Diameter: 34mm

• Seatpost Included: Yes

• Seatpost Diameter: 27.2mm

• Seatpost Clamp: Not included

• Front Derailleur Mount: Clamp type

• Front Derailleur Type:

  • High direct mount top-pull (Ø28.6mm)

  • Includes 26mm offset adapter (for 135mm rear hub spacing)

  • Compatible with 29mm offset adapter (not included, for 141mm rear hub spacing)

• Fork Construction:

  • 4130 Chromoly Natch tubing

  • Double-butted tapered fork blades

  • TIG welded and ED coated for corrosion protection

• Brake Type: Hydraulic Disc Brake

• Tire Compatibility:

  • XS–SM frames: 650b x 42mm (with or without fenders)

  • MD–XL frames: 700c x 42mm (with or without fenders)

• Bottom Bracket Type: 68mm BSA threaded

• Bottle Mounts: Yes

• Fender Mounts: Yes

• Rack Mounts: Yes

• Di2 Compatible: No

• Hub Spacing:

  • Front: 10 x 100mm

  • Rear: Gnot-Boost 138mm, fits 10 x 135mm or 10 x 141mm setups

• Max Chainring Size:

  • 1x (47CL): 42T

  • 2x (47CL): 46/36T