2021 Surly Bikes Midnight Special Base with Enve Gravel Disc Fork 40cm
Build
650B/27.5 in × 47 mm
Insights
Average 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 | 531mm |
| Reach | 363mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, C-TTT | 400mm |
| Top Tube Length, Effective/Horizontal HT Top | 500mm |
| Top Tube Length, Actual C-C | 487mm |
| Top Tube Slope | 14.9deg |
| Head Tube Angle | 71deg |
| Seat Tube Angle | 75.5deg |
| Head Tube Length | 95mm |
| Bottom Bracket Drop | 70mm |
| Bottom Bracket Height | 269mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 419.2mm |
| Front-Center | 578.1mm |
| Front-Center Horizontal | 573.8mm |
| Wheelbase | 993mm |
| Fork Offset/Rake | 47mm |
| Fork Length (Axle-To-Crown) | 395mm |
| Trail | 67mm high |
| Mechanical Trail | 63.4mm |
| Wheel Flop | 20.6mm |
| Standover Height | 720mm |
| Tire to Pedal Spindle Distance With 165 mm cranks | 74.1mm |
| Pedal Spindle to Ground Clearance With 165 mm cranks | 104mm |
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 | 1671mm |
| Crank Length | 165mm |
| Handlebar Width | 400mm |
| Stem Length | 70mm |
| 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