2025 OnebyESU JFF #503 OBS-R11 fork 580mm
Build
700C/29 in × 28 mm
Insights
Somewhat upright stack and reach vs trend of performance road bikes
Design deviates from other sizes of OnebyESU JFF #503
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 576.7mm |
| Reach | 383.2mm |
| Stack to Reach Ratio | 1.5:1 |
| Seat Tube Length, C-T | 580mm |
| Top Tube Length, Effective/Horizontal HT Top | 565mm |
| Top Tube Slope | 2.4deg |
| Head Tube Angle | 73deg |
| Seat Tube Angle | 72.5deg |
| Head Tube Length | 168mm |
| Bottom Bracket Drop | 68mm |
| Bottom Bracket Height | 271mm |
| Chainstay Length | 410mm |
| Chainstay Length Horizontal | 404.3mm |
| Front-Center | 589.7mm |
| Front-Center Horizontal | 585.8mm |
| Wheelbase | 990.1mm |
| Fork Offset/Rake | 45mm |
| Fork Length (On-Axis) | 366mm |
| Trail | 56.6mm mid/neutral |
| Mechanical Trail | 54.1mm |
| Wheel Flop | 15.8mm |
| Standover Height | 829.2mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 80.7mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 101mm |
OBS-R11 fork Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 28mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1668.1mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Carbon/Composite |
| Brake Type | Rim |
Published Sizing Recommendations
| Height | 180 cm to 190 cm |
Source:https://onebyesu.tokyo-san-esu.com/category/frames/jff_503.html, https://onebyesu.tokyo-san-esu.com/category/forks/r11.html