{"product_id":"surly-krampus-mountain-frame-mtbf0139","title":"Surly Krampus Frameset 29\" Steel Mountain Bike Frame - Gnot-Boost Compatibility, Internal Dropper Routing, Double-Butted CroMoly, Chester Copperpot, XL","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eDiscover the Surly Krampus Frameset - the ultimate steel 29\" mountain bike foundation designed for adventure, durability, and versatility. Crafted from high-quality Surly 4130 CroMoly steel, this frameset offers superior strength, responsive performance, and long-lasting reliability for trail riders, bikepackers, and everyday explorers alike.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003eMaterials \u0026amp; Construction\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eConstructed from 100% Surly CroMoly steel, the Krampus frameset features a double-butted main triangle and a 44mm headtube-ensuring optimal weight-to-strength ratio. The steel alloy provides excellent vibration damping, enhancing ride comfort on rugged terrains. The Chester Copperpot color with a brown finish lends the bike a rugged, vintage-inspired aesthetic that stands out on any trail.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-4\"\u003e\u003cp\u003ePerformance \u0026amp; Engineering\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-5\"\u003e\u003cp\u003eDesigned for aggressive off-road adventures, the Krampus accommodates up to 29 x 3.0\" plus-size tires, offering outstanding traction and control across diverse terrains. The frame features Gnot-Boost adjustable rear dropouts, allowing compatibility with multiple hub standards-including 145mm spacing, Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle, and 135mm quick-release hubs. This flexibility ensures your bike is future-proof and easy to upgrade.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-6\"\u003e\u003cp\u003eComponents \u0026amp; Technology\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-7\"\u003e\u003cp\u003eThe frameset includes a durable steel rigid fork with a 30.9mm seat tube diameter, compatible with internal dropper post routing for modern cockpit setup. The Gnot-Boost adjustable rear dropouts facilitate precise wheel and drivetrain alignment, maximizing efficiency and performance. The combination of 15mm Thru axles at the front and 12mm Thru at the rear offers improved stiffness, better steering precision, and added durability on challenging trails.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-8\"\u003e\u003cp\u003eStyle \u0026amp; Use Case\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-9\"\u003e\u003cp\u003ePerfect for bikepackers, trail riders, and plus-size adventurers, the Krampus Frameset embodies rugged utility with a classic look. Its versatile design makes it ideal for off-road exploration, bikepacking trips, and mountain biking enthusiasts seeking a dependable steel frame that handles both steep climbs and technical descents with ease.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eInnovative \u0026amp; Differentiating Features\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Gnot-Boost adjustable rear dropouts for multi-hub compatibility\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Designed to fit tires up to 29 x 3.0\" for superior traction and comfort\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Internal dropper seatpost routing for seamless integration\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Classic Chester Copperpot finish with robust steel construction for longevity and style\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003eUpgrade your cycling experience with the Surly Krampus Frameset - the perfect foundation for building a capable, stylish, and adventure-ready mountain bike tailored to your riding needs. Whether you're tackling rugged trails or embarking on extended bikepacking journeys, this steel frameset delivers premium performance, durability, and versatility.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eLightweight, durable Surly 4130 CroMoly steel frame and fork designed for rugged off-road adventures and 29+ tire compatibility for enhanced grip and stability on mixed terrains.\u003c\/li\u003e\n\u003cli\u003eInnovative Gnot-Boost adjustable rear dropouts offer versatile hub compatibility (145mm spacing), supporting Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle, and quick-release hubs, facilitating easy upgrades and maintenance.\u003c\/li\u003e\n\u003cli\u003eFeatures internal dropper seatpost routing and a 30.9mm seat tube for customizable, aggressive riding positions and improved control on technical trails and steep descents.\u003c\/li\u003e\n\u003cli\u003eStylish Chester Copperpot color with a classic, robust steel aesthetic that appeals to adventure cyclists seeking a distinctive look combined with high-performance engineering.\u003c\/li\u003e\n\u003cli\u003eEngineered for versatility and style, the Surly Krampus Frameset suits plus-size mountain biking, bikepacking, and trail riding, making it the perfect platform for building a personalized, adventure-ready 29+ steel mountain bike.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Surly","offers":[{"title":"Default Title","offer_id":42201909821507,"sku":"MTBF0139","price":949.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/FM2481.jpg?v=1779338407","url":"https:\/\/365cycles.com\/products\/surly-krampus-mountain-frame-mtbf0139","provider":"365 Cycles","version":"1.0","type":"link"}