2021 Surly Bikes ECR 29+ Base M
Build
700C/29 in × 3 in
Stack and Reach vs. Category Trend
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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