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