2025 REI Co-op Cycles ADV 2.1 Base L-self-measured
Build
700C/29 in × 45 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of REI Co-op Cycles ADV 2.1
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 592mm |
| Reach | 402mm |
| Stack to Reach Ratio | 1.47:1 |
| Seat Tube Length, C-T | 493mm |
| Top Tube Length, Effective/Horizontal Unknown | 493mm |
| Top Tube Slope | 15deg |
| Head Tube Angle | 72.1deg |
| Seat Tube Angle | 76deg |
| Head Tube Length | 160mm |
| Bottom Bracket Drop | 65.5mm |
| Bottom Bracket Height | 290.5mm |
| Chainstay Length | 441.5mm |
| Chainstay Length Horizontal | 436.6mm |
| Front-Center | 642mm |
| Front-Center Horizontal | 637.4mm |
| Wheelbase | 1074mm |
| Fork Offset/Rake | 50mm |
| Fork Length (Axle-To-Crown) | 420mm |
| Trail | 62.4mm mid/neutral |
| Mechanical Trail | 59.4mm |
| Wheel Flop | 18.3mm |
| Tire to Pedal Spindle Distance With 165 mm cranks | 121mm |
| Pedal Spindle to Ground Clearance With 165 mm cranks | 125.5mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 45mm |
| Tire Outer Diameter | 712mm |
| Bike Length with Tires | 1786mm |
| Crank Length | 165mm |
| Stem Length | 100mm |
| Stem Angle | 7deg |
| 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/207913/co-op-cycles-adv-21-bike