2023 Surly Bikes Karate Monkey 27.5+ 140mm Front Suspension
- Category
- Hardtail Cross-country MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Steel
- Fork
- Steel
- Suspension
- 140mm fork travel, 25% sag
- Features
- Disc brake, Single-speed capable
Geometry
XS | SM | MD | LG | XL | |
Stack | 601mm | 601mm | 602mm | 611mm | 621mm |
Reach | 371mm | 396mm | 421mm | 443mm | 466mm |
Stack to Reach Ratio | 1.62:1 | 1.52:1 | 1.43:1 | 1.38:1 | 1.33:1 |
Seat Tube Length, C-T | 330mm | 368mm | 419mm | 470mm | 521mm |
Top Tube Length, Effective/Horizontal HT Top | 562mm | 587mm | 612mm | 637mm | 662mm |
Top Tube Length, Actual C-C | 550mm | 560mm | 575mm | 598mm | 625mm |
Top Tube Slope | 31.4deg | 26.3deg | 20.3deg | 15.6deg | 11.2deg |
Head Tube Angle | 69deg | 69deg | 69deg | 69deg | 69deg |
Seat Tube Angle | 73deg | 73deg | 73deg | 73deg | 73deg |
Head Tube Length | 100mm | 100mm | 100mm | 110mm | 120mm |
Bottom Bracket Drop | 51mm | 51mm | 51mm | 51mm | 51mm |
Bottom Bracket Height | 317.2mm | 317.2mm | 317.2mm | 317.2mm | 317.2mm |
Chainstay Length | 423mm | 423mm | 423mm | 423mm | 423mm |
Chainstay Length Horizontal | 419.9mm | 419.9mm | 419.9mm | 419.9mm | 419.9mm |
Front-Center | 639.1mm | 664.1mm | 689mm | 713.9mm | 739.9mm |
Front-Center Horizontal | 637.1mm | 662.1mm | 687.1mm | 712.1mm | 738.1mm |
Wheelbase | 1057mm | 1082mm | 1107mm | 1132mm | 1158mm |
Fork Offset/Rake | 44mm | 44mm | 44mm | 44mm | 44mm |
Fork Length (Axle-To-Crown) | 499mm | 499mm | 499mm | 499mm | 499mm |
Trail | 94.2mm very high | 94.2mm very high | 94.2mm very high | 94.2mm very high | 94.2mm very high |
Mechanical Trail | 88mm | 88mm | 88mm | 88mm | 88mm |
Wheel Flop | 31.5mm | 31.5mm | 31.5mm | 31.5mm | 31.5mm |
Standover Height | 751mm | 769mm | 791mm | 819mm | 848mm |
Tire to Pedal Spindle | 100.9mm 170 mm cranks | 125.9mm 170 mm cranks | 145.8mm 175 mm cranks | 170.7mm 175 mm cranks | 196.7mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 147.2mm 170 mm cranks | 147.2mm 170 mm cranks | 142.2mm 175 mm cranks | 142.2mm 175 mm cranks | 142.2mm 175 mm cranks |
27.5+ 140mm Front Suspension Build
XS | SM | MD | LG | XL | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 3in | 3in | 3in | 3in | 3in |
Tire Width Max | 3in | 3in | 3in | 3in | 3in |
Tire Outer Diameter | 736.4mm | 736.4mm | 736.4mm | 736.4mm | 736.4mm |
Bike Length with Tires | 1793.4mm | 1818.4mm | 1843.4mm | 1868.4mm | 1894.4mm |
Crank Length | 170mm | 170mm | 175mm | 175mm | 175mm |
Handlebar Width | 750mm | 750mm | 800mm | 800mm | 800mm |
Stem Length | 60mm | 70mm | 70mm | 70mm | 80mm |
Stem Angle | 7deg | 7deg | 7deg | 7deg | 7deg |
Published Sizing Recommendations
Height | 5 ft 0 in to 5 ft 5 in | 5 ft 4 in to 5 ft 8 in | 5 ft 7 in to 6 ft 0 in | 5 ft 11 in to 6 ft 3 in | 6 ft 2 in to 6 ft 6 in |
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 Cross-country MTBSource:https://surlybikes.com/bikes/karate_monkey