The Krampus frameset is the pioneering force behind the plus-size movement in mountain biking. Crafted from 100% Surly 4130 CroMoly steel, this rigid frame and fork feature a double-butted main triangle and a robust 44mm headtube for enhanced strength and durability. The updated tube-set incorporates the same trumpet tubes found on the 2017 Karate Monkey frame, delivering a refined balance of stiffness and compliance.
Designed with versatility in mind, it includes Surly’s Gnot-Boost adjustable rear dropouts with 145mm spacing, compatible with Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle, and 135mm quick-release hubs. Internal routing for a dropper seatpost and a 30.9mm seat tube size add to the frame’s modern features.
This frameset accommodates large 29+ wheels and is engineered to fit tires up to 29 x 3.0 inches, providing excellent traction and control across varied terrain. The front axle uses a 15mm thru-axle with 110mm spacing, ensuring a stiff and reliable front end.
Ideal for mountain biking enthusiasts seeking a durable, steel rigid frame with disc brake compatibility, this frameset offers a proven platform for custom builds that demand toughness and versatility.
Designed with versatility in mind, it includes Surly’s Gnot-Boost adjustable rear dropouts with 145mm spacing, compatible with Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle, and 135mm quick-release hubs. Internal routing for a dropper seatpost and a 30.9mm seat tube size add to the frame’s modern features.
This frameset accommodates large 29+ wheels and is engineered to fit tires up to 29 x 3.0 inches, providing excellent traction and control across varied terrain. The front axle uses a 15mm thru-axle with 110mm spacing, ensuring a stiff and reliable front end.
Ideal for mountain biking enthusiasts seeking a durable, steel rigid frame with disc brake compatibility, this frameset offers a proven platform for custom builds that demand toughness and versatility.
Surly
Krampus Frameset - 29" Steel Sage Green Durable Mountain Bike Frame
$1,099.00
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Low stock (3 left)
SKU: 04-002342
The Krampus frameset is the pioneering force behind the plus-size movement in mountain biking. Crafted from 100% Surly 4130 CroMoly steel, this rigid frame and fork feature a double-butted main triangle and a robust 44mm headtube for enhanced strength and durability. The updated tube-set incorporates the same trumpet tubes found on the 2017 Karate Monkey frame, delivering a refined balance of stiffness and compliance.
Designed with versatility in mind, it includes Surly’s Gnot-Boost adjustable rear dropouts with 145mm spacing, compatible with Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle, and 135mm quick-release hubs. Internal routing for a dropper seatpost and a 30.9mm seat tube size add to the frame’s modern features.
This frameset accommodates large 29+ wheels and is engineered to fit tires up to 29 x 3.0 inches, providing excellent traction and control across varied terrain. The front axle uses a 15mm thru-axle with 110mm spacing, ensuring a stiff and reliable front end.
Ideal for mountain biking enthusiasts seeking a durable, steel rigid frame with disc brake compatibility, this frameset offers a proven platform for custom builds that demand toughness and versatility.
Designed with versatility in mind, it includes Surly’s Gnot-Boost adjustable rear dropouts with 145mm spacing, compatible with Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle, and 135mm quick-release hubs. Internal routing for a dropper seatpost and a 30.9mm seat tube size add to the frame’s modern features.
This frameset accommodates large 29+ wheels and is engineered to fit tires up to 29 x 3.0 inches, providing excellent traction and control across varied terrain. The front axle uses a 15mm thru-axle with 110mm spacing, ensuring a stiff and reliable front end.
Ideal for mountain biking enthusiasts seeking a durable, steel rigid frame with disc brake compatibility, this frameset offers a proven platform for custom builds that demand toughness and versatility.
SPECIFICATIONS
Please Note: Product images are for illustrative purposes only. Manufacturers occasionaly make updates to components, specifications, and finishes, meaning the actual bike you receive may vary slightly from the photos. However, any substituted parts will always be of like or better quality. If you have any questions about specific components, please don't hesitate to reach out to our team so we can get you the most up-to-date info on our current stock.
GEOMETRY
| Size | Small | Medium | Large | X-Large |
|---|---|---|---|---|
| A. Effective Top Tube | 585.0 | 610.0 | 635.0 | 660.0 |
| B. Stand Over | 770.0 | 797.0 | 825.0 | 853.0 |
| C. Reach | 404.0 | 426.0 | 448.0 | 470.0 |
| D. Stack | 593.0 | 602.0 | 612.0 | 621.0 |
| E. Total Seat Tube Length | 368.0 | 419.0 | 470.0 | 521.0 |
| F. Headtube Length | 90.0 | 100.0 | 110.0 | 120.0 |
| G. Headtube Angle |
69.0
|
69.0
|
69.0
|
69.0
|
| H. Seat Tube Angle |
73.0
|
73.0
|
73.0
|
73.0
|
| I. BB Drop | 65.0 | 65.0 | 65.0 | 65.0 |
| K. Chainstay Length | 435.0 | 435.0 | 435.0 | 435.0 |
| L. Fork Length Axle to Crown | 483.0 | 483.0 | 483.0 | 483.0 |
| M. Fork Offset | 47.0 | 47.0 | 47.0 | 47.0 |
| N. Wheelbase | 1087.0 | 1113.0 | 1138.0 | 1164.0 |
| Crank Arm Length | ||||
| Handlebar Width | ||||
| Recommended Rider Height | 162.0 - 173.0 | 170.0 - 183.0 | 180.0 - 190.0 | 188.0 - 198.0 |
| Stem Length |