2021 Surly Bikes Midnight Special Base with Enve Adventure Fork 58cm
Build
650B/27.5 in × 47 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Surly Bikes Midnight Special
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 599mm |
| Reach | 402mm |
| Stack to Reach Ratio | 1.49:1 |
| Seat Tube Length, C-TTT | 580mm |
| Top Tube Length, Effective/Horizontal HT Top | 585mm |
| Top Tube Length, Actual C-C | 579mm |
| Top Tube Slope | 2.5deg |
| Head Tube Angle | 73deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 160mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 274mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 420mm |
| Front-Center | 610.5mm |
| Front-Center Horizontal | 607mm |
| Wheelbase | 1027mm |
| Fork Offset/Rake | 49mm |
| Fork Length (Axle-To-Crown) | 398mm |
| Trail | 52.4mm mid/neutral |
| Mechanical Trail | 50.1mm |
| Wheel Flop | 14.7mm |
| Standover Height | 846mm |
| Tire to Pedal Spindle Distance With 175 mm cranks | 96.5mm |
| Pedal Spindle to Ground Clearance With 175 mm cranks | 99mm |
Base with Enve Adventure Fork Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 47mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1705mm |
| Crank Length | 175mm |
| Handlebar Width | 440mm |
| Stem Length | 120mm |
| Stem Angle | 6deg |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:bikeinsights.com