2021 Surly Bikes ECR 29+ Base M

Build

700C/29 in × 3 in

Insights

Somewhat upright stack and reach vs trend of rigid mtb bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
609.5mm
Reach
408mm
Stack to Reach Ratio
1.49:1
Seat Tube Length, C-T
457.2mm
Top Tube Length, Effective/Horizontal HT Top
600mm
Top Tube Length, Actual C-C
560.5mm
Top Tube Slope
17.6deg
Head Tube Angle
70deg
Seat Tube Angle
72.5deg
Head Tube Length
100mm
Bottom Bracket Drop
80mm
Bottom Bracket Height
307.2mm
Chainstay Length
451mm
Chainstay Length Horizontal
443.9mm
Front-Center
651.1mm
Front-Center Horizontal
646.2mm
Wheelbase
1090mm
Fork Offset/Rake
43mm
Fork Length (Axle-To-Crown)
468mm
Trail
95.2mm
very high
Mechanical Trail
89.4mm
Wheel Flop
30.6mm
Standover Height
805mm
Tire to Pedal Spindle Distance
With 175 mm cranks
88.9mm
Pedal Spindle to Ground Clearance
With 175 mm cranks
132.2mm

Base Build

Wheel Size
700C, 29 inch (622mm BSD)
Tire Width
3in
Tire Outer Diameter
774.4mm
Bike Length with Tires
1864.4mm
Crank Length
175mm
Handlebar Width
735mm
Stem Length
70mm
Stem Angle
6deg
Suspension Type
Rigid, non-suspension corrected
Bar Type
Flat Bar
Frame Material
Steel
Fork Material
Steel
Brake Type
Disc
Source:https://surlybikes.com/bikes/ecr