2026 REI Coop ADV 2.1 Base L
Build
700C/29 in × 45 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 602mm |
| Reach | 393.4mm |
| Stack to Reach Ratio | 1.53:1 |
| Seat Tube Length, C-T | 500mm |
| Top Tube Length, Effective/Horizontal Center | 571.7mm |
| Top Tube Slope | 12.9deg |
| Head Tube Angle | 71.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 160mm |
| Chainstay Length | 438mm |
| Wheelbase | 1057.5mm |
| Fork Offset/Rake | 51mm |
| Trail | 65.3mm high |
| Mechanical Trail | 62mm |
| Wheel Flop | 19.7mm |
| Standover Height | 788.1mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | — |
| Pedal Spindle to Ground Clearance With 170 mm cranks | — |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 45mm |
| Tire Outer Diameter | 712mm |
| Bike Length with Tires | 1769.5mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Aluminum |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.rei.com/product/254161/co-op-cycles-adv-21-bike