2017 Aventon Bikes Ultro Base Medium (fits like 55cm)
Build
700C/29 in × 23 mm
Insights
Somewhat upright stack and reach vs trend of track/fixed-gear bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 539mm |
| Reach | 395mm |
| Stack to Reach Ratio | 1.36:1 |
| Seat Tube Length, C-T | 510mm |
| Top Tube Length, Effective/Horizontal Center | 545mm |
| Top Tube Slope | 5.1deg |
| Head Tube Angle | 73deg |
| Seat Tube Angle | 74.5deg |
| Head Tube Length | 148mm |
| Bottom Bracket Drop | 56mm |
| Bottom Bracket Height | 278mm |
| Chainstay Length | 390mm |
| Chainstay Length Horizontal | 386mm |
| Front-Center | 581.7mm |
| Front-Center Horizontal | 579mm |
| Wheelbase | 965mm |
| Fork Offset/Rake | 35mm |
| Trail | 65.5mm high |
| Mechanical Trail | 62.7mm |
| Wheel Flop | 18.3mm |
| Standover Height | 789mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 77.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 108mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 23mm |
| Tire Outer Diameter | 668mm |
| Bike Length with Tires | 1633mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | N/A |
Source:https://sandiegocyclery.com/shop/fixed-gear/track-frames-forks/aventon-frames/aventon-ultro/