surly gravel bike frame Surly Preamble Steel Gravel & Commuter Frameset

Elevate your cycling experience with the Surly Preamble Frameset in stunning Thorfrost White - the perfect foundation for a durable, versatile, and stylish adventure bike. Crafted from premium 100% Surly Chromoly steel, this lightweight yet rugged frameset boasts advanced double-butted tubing that offers excellent strength-to-weight ratio, absorbing road vibrations for a smooth and comfortable ride on pavement and gravel alike.

Designed for riders of all levels, the Preamble frameset is available in five thoughtfully engineered sizes (XS, S, M, L, XL) featuring a slightly sloped top tube on smaller frames to enhance standover clearance and rider comfort. Its compatibility with both 1x and 2x drivetrains provides flexible gearing options, making it an ideal choice for commuting, weekend gravel adventures, or city riding.

Performance & Engineering:

- Made from high-grade Surly Chromoly steel with double-butted main triangle for superior durability and ride feel

- Disc brake specific frame featuring flat-mount or post-mount compatibility for consistent stopping power in all weather conditions

- Rigid steel fork enhances steering precision while providing excellent vibration damping

- Includes mounts for racks, fenders, and two bottle cages (seat tube and down tube) for added versatility on long rides or daily commutes

Components & Technology:

- Single-position vertical dropout compatible with Surly Bridge Club and other adventure-specific accessories

- Rear axle: QR x 138mm, front axle: QR x 100mm, facilitating straightforward wheel upgrades and maintenance

- Clearances designed for 700c x 41mm tires (or 38mm with fenders) and 650b x 41mm tires on smaller sizes, enabling optimal traction and comfort across varied terrains

- Steel construction ensures robust performance and a classic aesthetic with modern engineering

Style & Use Case:

With its sleek Thorfrost White finish, the Surly Preamble Frameset combines rugged durability with understated style, perfect for riders seeking a reliable platform for commuting, bikepacking, or gravel exploration. Its versatile design and mounting points make it highly adaptable to personalized setups-be it racks, fenders, or custom accessories-empowering riders to craft a bike tailored to their adventure needs.

Innovative & Differentiating Features:

- Designed specifically for ease of customization, allowing seamless integration of accessories and drivetrain configurations

- Compatible with both 650b and 700c wheelsets, offering exceptional flexibility for different riding styles and terrains

- Surly's legacy of durable, handcrafted steel frames ensures long-lasting performance and a timeless aesthetic

Upgrade your cycling toolkit with the Surly Preamble Frameset-an exceptional choice for riders who demand reliability, versatility, and style in every ride. Whether you're a seasoned gravel grinder or a weekend commuter, this frameset provides the perfect blank canvas to build your ideal adventure bike.

• Durable custom steel tubing construction with double-butted Chromoly ensures a lightweight yet robust frame designed for long-lasting performance on pavement and gravel routes.
• The Surly Preamble Frameset features disc brake compatibility, providing superior stopping power and reliable modulation in various weather conditions and terrains.
• Compatible with 700c wheelsets and capable of accommodating up to 41mm tires on mid-sized frames, offering excellent puncture resistance and comfort for off-road adventures or daily commuting.
• Designed in a sleek Thorfrost White finish, this versatile frameset includes mounts for racks, fenders, and two bottle cages, making it ideal for touring, commuting, or weekend gravel rides.
• Engineered with a slightly sloped top tube on XS and small sizes for enhanced standover clearance and rider comfort, combined with multi-use compatibility for both flat-bar and drop-bar setups.