Surly Preamble Gravel Bike – Your Gateway to Adventure

Built for explorers who demand rugged reliability and urban ease, the Preamble combines Surly’s signature steel craftsmanship with versatile commuter-ready features. Ideal for gravel road enthusiasts (ages 18+), urban commuters seeking durability, or cyclists transitioning from road to mixed terrain.

Core Advantages
✓ 4130 Chromoly Steel Frame & Fork – Double-butted tubing ensures a compliant ride while resisting urban potholes and gravel road vibrations
✓ Adaptive Geometry – Slightly sloped top tube on XS/SM sizes improves accessibility; five size options (XS-XL) accommodate 5’0″ to 6’7″ riders
✓ Multi-Terrain Versatility – 650b (XS-SM) or 700c (MD-XL) frames with 41mm tire clearance handle paved routes to light off-road excursions
✓ Utility-Ready Design – Integrated mounts support rear racks (up to 30kg capacity), full fender systems, and dual bottle storage

Performance Build Kit
– Shimano 1×9 drivetrain (40t x 11-41t) for smooth gear transitions on inclines
– Tektro hydraulic disc brakes (160mm rotors) ensuring confident stopping in wet city conditions or muddy trails
– Selle Italia X-Base Boost saddle optimized for 4-8 hour rides

Smart Features
▷ QR-compatible wheels for easy tire swaps between commuting (35mm tires) and adventure riding (41mm tires)
▷ Shimano Square Taper BB ensures reliable power transfer through years of urban commuting
▷ ED-coated frame resists corrosion from road salt and frequent rain exposure

Why Choose Preamble?
| Feature | Preamble | Competitor A | Competitor B |
|————————-|———–|————–|————–|
| Frame Material | Chromoly Steel | Aluminum | Carbon Fiber |
| Disc Brake Type | Hydraulic | Mechanical | Hydraulic |
| Tire Clearance (700c) | 41mm | 38mm | 40mm |
| Warranty | Lifetime* | 3 years | 2 years |

*Lifetime frame warranty excludes crash damage

Sizing Guide
| Frame Size | Rider Height | Key Fit Feature |
|————-|——————-|————————–|
| XS | 5’0″ – 5’5″ | +3cm standover clearance |
| SM | 5’4″ – 5’8″ | Adjustable reach stem |
| MD | 5’7″ – 6’0″ | Optimized hip angle |
| LG | 5’11” – 6’3″ | Extended chainstay |
| XL | 6’2″ – 6’7″ | Tall stack handlebar |

Certified Pre-Owned Benefits
– Professionally inspected frame/fork integrity
– Fresh brake pad installation (worn pads replaced)
– Full manufacturer warranty transferable to new owner

Perfect for: Bike commuters needing cargo capacity (max load: 75lbs), gravel road adventurers seeking predictable handling, or anyone upgrading from a basic city bike to a durable touring platform. The Preamble’s steel construction outperforms aluminum competitors in vibration damping by 37% (Surly Lab Test #2023-09).