2025 Author Aura XR 4/5/6/7 Base 480
Build
700C/29 in × 38 mm
Insights
Somewhat upright stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Author Aura XR 4/5/6/7
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 562mm |
| Reach | 364mm |
| Stack to Reach Ratio | 1.54:1 |
| Seat Tube Length, C-T | 480mm |
| Top Tube Length, Effective/Horizontal HT Top | 520mm |
| Top Tube Slope | 11.4deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 74.5deg |
| Head Tube Length | 125mm |
| Bottom Bracket Drop | 71mm |
| Bottom Bracket Height | 278mm |
| Chainstay Length | 435mm |
| Chainstay Length Horizontal | 429.2mm |
| Front-Center | 595.1mm |
| Front-Center Horizontal | 590.8mm |
| Wheelbase | 1020mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 408mm |
| Trail | 79.1mm high |
| Mechanical Trail | 74.4mm |
| Wheel Flop | 25.4mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 76.1mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 108mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 38mm |
| Tire Outer Diameter | 698mm |
| Bike Length with Tires | 1718mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Aluminum |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:http