Surly Preamble frame set, cheddar

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

Available sizes: M (last one)

L

Compatible headset: Cane Creek or Ritchey

Headset: EC34/28.6 – EC34/30 (also available with installation 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.