2023 Surly Bikes Karate Monkey 27.5+ 140mm Front Suspension SM
Build
650B/27.5 in × 3 in
Insights
Average stack and reach vs trend of hardtail cross-country mtb bikes
Design deviates from other sizes of Surly Bikes Karate Monkey
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 601mm |
| Reach | 396mm |
| Stack to Reach Ratio | 1.52:1 |
| Seat Tube Length, C-T | 368mm |
| Top Tube Length, Effective/Horizontal HT Top | 587mm |
| Top Tube Length, Actual C-C | 560mm |
| Top Tube Slope | 26.3deg |
| Head Tube Angle | 69deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 51mm |
| Bottom Bracket Height | 317.2mm |
| Chainstay Length | 423mm |
| Chainstay Length Horizontal | 419.9mm |
| Front-Center | 664.1mm |
| Front-Center Horizontal | 662.1mm |
| Wheelbase | 1082mm |
| Fork Offset/Rake | 44mm |
| Fork Length (Axle-To-Crown) | 499mm |
| Trail | 94.2mm very high |
| Mechanical Trail | 88mm |
| Wheel Flop | 31.5mm |
| Standover Height | 769mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 125.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 147.2mm |
27.5+ 140mm Front Suspension Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 3in |
| Tire Outer Diameter | 736.4mm |
| Bike Length with Tires | 1818.4mm |
| Crank Length | 170mm |
| Handlebar Width | 750mm |
| Stem Length | 70mm |
| Stem Angle | 7deg |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 140mm |
| Suspension Sag | 25% |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
| Features | Single-speed capable |
Published Sizing Recommendations
| Height | 5 ft 4 in to 5 ft 8 in |
Source:https://surlybikes.com/bikes/karate_monkey