2021 Trek Bikes 820 Base s
Build
26 in × 2 in
Insights
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Seat Tube Length, C-T | 406mm |
| Top Tube Length, Effective/Horizontal Center | 550mm |
| Head Tube Angle | 70.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 110mm |
| Bottom Bracket Drop | 39.3mm |
| Bottom Bracket Height | 291mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 428.2mm |
| Front-Center | 613.1mm |
| Front-Center Horizontal | 611.8mm |
| Wheelbase | 1040mm |
| Fork Offset/Rake | 40mm |
| Trail | 74.5mm high |
| Mechanical Trail | 70.3mm |
| Wheel Flop | 23.5mm |
| Standover Height | 738mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 112.8mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 121mm |
Base Build
| Wheel Size | 26 inch (559mm BSD) |
| Tire Width | 2in |
| Tire Outer Diameter | 660.6mm |
| Bike Length with Tires | 1700.6mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 80mm |
| Suspension Sag | Unknown |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Source:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/cross-country-mountain-bikes/820/820/p/17027/