2021 Surly Bikes Midnight Special Base with Enve Gravel Disc Fork 60cm
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 | 620mm |
| Reach | 409mm |
| Stack to Reach Ratio | 1.52:1 |
| Seat Tube Length, C-TTT | 600mm |
| Top Tube Length, Effective/Horizontal HT Top | 605mm |
| Top Tube Length, Actual C-C | 597mm |
| Top Tube Slope | 2.8deg |
| Head Tube Angle | 73.5deg |
| Seat Tube Angle | 72.5deg |
| Head Tube Length | 180mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 274mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 420mm |
| Front-Center | 619.4mm |
| Front-Center Horizontal | 616mm |
| Wheelbase | 1036mm |
| Fork Offset/Rake | 47mm |
| Fork Length (Axle-To-Crown) | 395mm |
| Trail | 51.4mm mid/neutral |
| Mechanical Trail | 49.3mm |
| Wheel Flop | 14mm |
| Standover Height | 866mm |
| Tire to Pedal Spindle Distance With 175 mm cranks | 105.4mm |
| Pedal Spindle to Ground Clearance With 175 mm cranks | 99mm |
Base with Enve Gravel Disc Fork Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 47mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1714mm |
| Crank Length | 175mm |
| Handlebar Width | 460mm |
| 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:https://surlybikes.com/bikes/midnight_special