Surly Preamble frame set, black

Sturdy Surly chromoly steel frame for gravel, touring and bikepacking. Generous tyre clearance, durable construction and versatile mounting points make it ideal for discerning riders looking for a reliable steel bike.

Available sizes: XS (last one)

and L

Compatible headset: Cane Creek or Ritchey

Headset: EC34/28.6 – EC34/30 (also available with fitting on request)

Note on stock: Stock levels may change at short notice. Please contact us directly for current availability.

Frame set specifications:

Clearance

Frame:

• XS–SM: 650b × 41 mm (with or without mudguards)
• MD–XL: 700c × 41 mm (with or without mudguards)

Fork:

• 650b × 42 mm (with/without mudguards)
• 700c × 42 mm (with or without mudguards)

Frame construction

• 100% Surly Chromoly steel
• Natch Tubing, double-butted main frame
• TIG-welded, E.D. coated (corrosion protection)

Fork construction

• 4130 chromoly, Natch Tubing
• Double-butted, tapered fork legs
• TIG-welded, E.D. coated

Geometry & dimensions

• Rigid fork length:
  • XS–SM: 380 mm
  • MD–XL: 400 mm
• Fork offset:
  • XS–SM: 47 mm
  • MD–XL: 44 mm

Rear triangle & axle standard

• ‘Gnot-Boost’138 mm rear triangle
• Compatible with 10 × 135 mm and 10 × 141 mm axles

Brake mount

• Rear: Disc, 51 mm I.S., max. 180 mm rotor
• Front: Disc, 51 mm I.S., max. 203 mm rotor

Headset

• Top tube: EC34/28.6
• Bottom cup: EC34/30
• Steerer tube: Ø28.6 mm
• Crown race: 30 mm (1 1/8")

Front wheel standard

• 10 × 100 mm

Seatpost & clamps

• Seat post: Ø27.2 mm
• Clamp: Ø30.0 mm
• Dropper seatpost: not compatible

Front derailleur

• High Direct Mount, Top-Pull (Ø28.6 mm)
• Offset adapter (not included):
  • 26 mm for 135 mm rear triangle
  • 29 mm for 141 mm rear triangle

Bottom bracket

• 68 mm BSA, threaded

Chainring capacity

• 1× (47 CL): max. 42T
• 2× (47 CL): max. 46/36T

Mounting points

• 2 bottle cages on the frame
• Fork crown + Mid-Blade rack mounts
• Front and rear mudguard mounts

The Surly frame offers maximum versatility for gravel, touring and bikepacking. Crafted from high-quality Surly Chromoly Natch steel, it impresses with its stability, comfort and long service life. The generous tyre clearance, robust mounting points and Gnot-Boost rear triangle construction make it an ideal choice for discerning riders looking for a reliable and versatile steel bike.