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Surly Krampus Frameset

RM 4,080.00
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Five years ago, we launched the Krampus because we wanted something that was more than a mountain bike but less than a fatbike. We dubbed it a “plus bike” and set it loose on the world. It turns out, people were in to it. Fast-forward a few years and you can barely swing a dead cat without hitting a plus bike. While we’re mildly tickled that the whole plus thing caught on, what we really want to know is what the hell you’re doing swinging a dead cat around on the trail. Seriously, what’s wrong with you?

Anyway, the original Krampus brought a lot to the table in regards to terrain-tackling and trail-ripping abilities. As “standards” have evolved, so too has the Krampus. Now featuring our Gnot-Boost rear spacing, the Krampus can take whatever mountain bike hub you feel compelled to ride. 10 x 135mm QR, 12 x 142, or 12 x 148 Boost™ will all work. Gneat, huh? The Krampus geometry also got some small tweaks. We shortened some things, made some stuff longer, and slackened other parts ever so slightly. We even made it compatible with dropper posts complete with some stealthy cable routing. All these changes mean the trail now cowers before you.

The Krampus frame is constructed using the same custom-designed, frame-specific, Surly CroMoly “’Natch” steel tubes found on many of our other trail bikes. The main triangle’s tubes are internally butted with some tubes externally tapered, flared like a trumpet and ovalized to add stiffness and strength without adding weight. When you add in the 3” tires, it makes for a resilient and lively ride that’s durable and fun as hell.

If you’re looking to ride through/over/off of obstacles, may the Krampus be your mighty steed. As Thor puts it: “Lean back, hang on, and ride that wild horse.”




Surly 4130 Cro-Moly Steel. Custom double butted externally flaired tubing. Horizontal slotted with derailleur hanger, Surly “Gnot Boost” 142 or 148mm hub spacing compatibility


483mm axle-to-crown x 47mm offset, 110mm hub spacing, tapered and butted straight blade, 4130 CroMoly. 51mm I.S. disc mount

Seatpost clamp

Surly stainless, 33.1mm

Surly 4130 CroMoly steel. Custom double-butted trumpet tube main triangle. TIG-welded. ED coated.
Rear Dropouts
12mm horizontal and vertical slotted with derailleur hanger and Surly “Gnot-Boost” 135, 142, and/or 148mm hub spacing compatibility
Brake Compatibility
51mm I.S. disc caliper mounts, 180mm max rotor size
Two down tube bottle-mounts on all sizes (SM-XL), no seat tube bosses
Seatpost diameter
Seatpost clamp diameter
33.1mm (Surly Stainless included)
Headset/Steerer Tube
ZS44/28.6 upper, EC44/30 lower
Front Derailleur Clamp Diameter
34.9mm, high direct-mount
Bottom bracket shell
Chainring Clearance
30t Boost 1x, 24/36t Boost 2x
Tire Clearance
29 x 3.0"
15mm Thru-Axle, 1-1/8˝ steerer tube, 203mm disc brake clearance and 29 x 3.0" tire clearance
Thru Axle
HU0138 Surly 15x110 Front Thru Axle
HU0134 Surly 12x142/148 Rear Thru Axle
Andy's Apple Red
Dark Black (Frameset Only)

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