2025 Just Bikes JB04 Base 51cm
Build
700C/29 in × 40 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Just Bikes JB04
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 539mm |
| Reach | 388mm |
| Stack to Reach Ratio | 1.39:1 |
| Seat Tube Length, C-T | 510mm |
| Top Tube Length, Effective/Horizontal Unknown | 547mm |
| Top Tube Length, Actual C-C | 532mm |
| Top Tube Slope | 5.3deg |
| Head Tube Angle | 71.6deg |
| Seat Tube Angle | 73.6deg |
| Head Tube Length | 130mm |
| Bottom Bracket Drop | 64mm |
| Bottom Bracket Height | 287mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 420.2mm |
| Front-Center | 597.3mm |
| Front-Center Horizontal | 593.9mm |
| Wheelbase | 1014mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 386mm |
| Trail | 69.3mm high |
| Mechanical Trail | 65.8mm |
| Wheel Flop | 20.8mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 76.3mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 117mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 40mm |
| Tire Outer Diameter | 702mm |
| Bike Length with Tires | 1716mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Disc |
Source:https://just-bikes.de/collections/gravel-bikes-cyclocross/products/just-bikes-jb04-gravel-bike-mit-shimano-grx-600-olivgrun