{"product_id":"surly-krampus-mountain-frame-mtbf0133","title":"Surly Krampus Frameset 29-Inch Steel Bike Frame Blue Oyster Coat Heavy-Duty CroMoly Construction, Gnot-Boost Dropouts \u0026 Internal Dropper Routing","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eDiscover the Surly Krampus Frameset - the definitive choice for adventurous cyclists seeking a rugged, versatile, and stylish steel fat bike frame. Crafted from high-quality Surly 4130 Cro-Moly steel, this X-Large frameset blends durability, performance, and classic style for off-road exploration and multi-terrain riding.\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 4130 Cro-Moly steel, known for its exceptional strength-to-weight ratio and longevity. The double-butted main triangle and 44mm headtube ensure a stiff, responsive ride while maintaining lightweight performance. The steel fork, also made from durable steel, provides natural vibration damping for comfortable rides over rough terrain.\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 serious fat biking, the Krampus frameset is compatible with up to 29 x 3.0 tires, making it ideal for snow, sand, or trail riding. The 145mm Gnot-Boost rear hub spacing offers TRUE adaptability, compatible with Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle, and traditional 135mm quick-release hubs, providing flexibility for various wheel setups. The internal dropper seatpost routing enhances adjustable comfort for technical terrains and steep descents.\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\u003eFeaturing Gnot-Boost adjustable rear dropouts, the frameset allows for precise wheelbase customization and easy tire clearance. The 30.9mm seat tube accommodates modern dropper posts, enabling seamless saddle height adjustments on the fly. The rigid steel fork adds reliability and control, perfect for aggressive riding styles and long-distance adventures.\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\u003eSporting a striking Blue Oyster Coat finish, this frameset embodies rugged elegance and purpose-driven design. Its compatibility with 29+ wheels and tires promotes immense traction and stability for challenging terrains. Whether you're tackling snow-covered mountains, sandy dunes, or rugged trails, the Surly Krampus frameset offers unmatched versatility for dedicated fat bike enthusiasts and adventurous explorers.\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 spacing for maximum wheel compatibility\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Reinforced steel construction with professional-grade durability\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- Internal dropper routing for modern seatpost setup\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Compatible with a broad range of fat bike tires up to 3.0 inches wide\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- Classic steel frame for easy repairability and long-term reliability\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003eUpgrade your biking experience with the Surly Krampus Frameset - built for the wild at heart. Perfect for fat biking, trail riding, and winter adventures, this frameset delivers legendary durability, flexible customization, and timeless style for serious cyclists looking to expand their off-road horizons.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eDurable 4130 CroMoly steel construction with double-butted tubing and reinforced headtube for exceptional strength and longevity, perfect for all-mountain adventures. \u003c\/li\u003e\n\u003cli\u003eFeatures innovative Gnot-Boost adjustable rear dropout spacing, offering compatibility with Boost 148 x 12mm thru-axle and standard quick-release hubs, enhancing versatility for various equipment setups. \u003c\/li\u003e\n\u003cli\u003eDesigned with internal dropper post routing and a 30.9mm seat tube, this frameset supports modern mountain bike components and customizations for a sleek, integrated design. \u003c\/li\u003e\n\u003cli\u003eOptimized for plus-size tires up to 29 x 3.0 for superior traction and stability, making it ideal for challenging terrains and aggressive trail riding styles. \u003c\/li\u003e\n\u003cli\u003eShowcasing a striking Blue Oyster Coat finish, this X-Large Surly Krampus frameset combines rugged style with practical engineering, delivering high performance in a versatile rigid steel frame built for 29\"+ wheel compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Surly","offers":[{"title":"Default Title","offer_id":42201911263299,"sku":"MTBF0133","price":949.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/FM2477.jpg?v=1779338394","url":"https:\/\/365cycles.com\/products\/surly-krampus-mountain-frame-mtbf0133","provider":"365 Cycles","version":"1.0","type":"link"}