2021 Surly Bikes Midnight Special Base with Enve Gravel Disc Fork 50cm

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
544mm
Reach
379mm
Stack to Reach Ratio
1.44:1
Seat Tube Length, C-TTT
500mm
Top Tube Length, Effective/Horizontal HT Top
540mm
Top Tube Length, Actual C-C
531mm
Top Tube Slope
4.9deg
Head Tube Angle
72deg
Seat Tube Angle
73.5deg
Head Tube Length
110mm
Bottom Bracket Drop
65mm
Bottom Bracket Height
274mm
Chainstay Length
425mm
Chainstay Length Horizontal
420mm
Front-Center
590.6mm
Front-Center Horizontal
587mm
Wheelbase
1007mm
Fork Offset/Rake
47mm
Fork Length (Axle-To-Crown)
395mm
Trail
60.7mm
mid/​neutral
Mechanical Trail
57.8mm
Wheel Flop
17.9mm
Standover Height
778mm
Tire to Pedal Spindle Distance
With 170 mm cranks
81.6mm
Pedal Spindle to Ground Clearance
With 170 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
1685mm
Crank Length
170mm
Handlebar Width
400mm
Stem Length
80mm
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