2018-2019 Surly Bikes Midnight Special Base 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 | 40mm |
| Fork Length (Axle-To-Crown) | 400mm |
| Trail | 61.8mm mid/neutral |
| Mechanical Trail | 59.1mm |
| Wheel Flop | 17.3mm |
| Standover Height | 846mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 101.5mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 104mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 47mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1705mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:https://surlybikes.com/bikes/midnight_special/geometry