2025 Surly Bikes Krampus 120mm Fork
- Category
- Hardtail Trail MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Steel
- Suspension
- 120mm fork travel
- Features
- Disc brake
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
SM | MD | LG | XL | |
Stack | 597mm | 607mm | 616mm | 626mm |
Reach | 397mm | 419mm | 442mm | 464mm |
Stack to Reach Ratio | 1.5:1 | 1.45:1 | 1.39:1 | 1.35:1 |
Seat Tube Length, C-T | 368mm | 419mm | 470mm | 521mm |
Top Tube Length, Effective/Horizontal HT Top | 585mm | 610mm | 635mm | 660mm |
Top Tube Length, Actual C-C | 556.8mm | 573mm | 595.1mm | 621.8mm |
Top Tube Slope | 25.9deg | 20.8deg | 16.1deg | 11.8deg |
Head Tube Angle | 68.4deg | 68.4deg | 68.4deg | 68.4deg |
Seat Tube Angle | 72.4deg | 72.4deg | 72.4deg | 72.4deg |
Head Tube Length | 90mm | 100mm | 110mm | 120mm |
Bottom Bracket Drop | 60mm | 60mm | 60mm | 60mm |
Bottom Bracket Height | 317mm | 317mm | 317mm | 317mm |
Chainstay Length | 435mm | 435mm | 435mm | 435mm |
Chainstay Length Horizontal | 430.8mm | 430.8mm | 430.8mm | 430.8mm |
Front-Center | 667.9mm | 692.8mm | 718.7mm | 744.6mm |
Front-Center Horizontal | 665.2mm | 690.2mm | 716.2mm | 742.2mm |
Wheelbase | 1096mm | 1121mm | 1147mm | 1173mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm |
Fork Length (Axle-To-Crown) | 498mm | 498mm | 498mm | 498mm |
Trail | 94.4mm very high | 94.4mm very high | 94.4mm very high | 94.4mm very high |
Mechanical Trail | 87.8mm | 87.8mm | 87.8mm | 87.8mm |
Wheel Flop | 32.3mm | 32.3mm | 32.3mm | 32.3mm |
Standover Height | 776mm | 803mm | 832mm | 861mm |
Tire to Pedal Spindle | 120.8mm 170 mm cranks | 140.7mm 175 mm cranks | 166.6mm 175 mm cranks | 192.5mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 147mm 170 mm cranks | 142mm 175 mm cranks | 142mm 175 mm cranks | 142mm 175 mm cranks |
120mm Fork Build
SM | MD | LG | XL | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.6in | 2.6in | 2.6in | 2.6in |
Tire Width Max | 3in | 3in | 3in | 3in |
Tire Outer Diameter | 754.1mm | 754.1mm | 754.1mm | 754.1mm |
Bike Length with Tires | 1850.1mm | 1875.1mm | 1901.1mm | 1927.1mm |
Crank Length | 170mm | 175mm | 175mm | 175mm |
Handlebar Width | 750mm | 800mm | 800mm | 800mm |
Stem Length | 70mm | 70mm | 70mm | 80mm |
Stem Angle | 7deg | 7deg | 7deg | 7deg |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Hardtail Trail MTBSource:https://surlybikes.com/bikes/krampus