2025 Just Bikes JB04 Base 53cm
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 | 556mm |
| Reach | 391mm |
| Stack to Reach Ratio | 1.42:1 |
| Seat Tube Length, C-T | 535mm |
| Top Tube Length, Effective/Horizontal Unknown | 550mm |
| Top Tube Length, Actual C-C | 538mm |
| Top Tube Slope | 4.4deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 150mm |
| Bottom Bracket Drop | 60mm |
| Bottom Bracket Height | 291mm |
| Chainstay Length | 425mm |
| Chainstay Length Horizontal | 420.7mm |
| Front-Center | 602.3mm |
| Front-Center Horizontal | 599.3mm |
| Wheelbase | 1020mm |
| Fork Offset/Rake | 45mm |
| Fork Length (Axle-To-Crown) | 389mm |
| Trail | 66.7mm high |
| Mechanical Trail | 63.5mm |
| Wheel Flop | 19.6mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 81.3mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 121mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 40mm |
| Tire Outer Diameter | 702mm |
| Bike Length with Tires | 1722mm |
| 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