2025 Gravity Zilla AL PRO 54cm
Build
700C/29 in × 50 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 593.6mm |
| Reach | 382.5mm |
| Stack to Reach Ratio | 1.55:1 |
| Seat Tube Length, C-T | 540mm |
| Top Tube Length, Effective/Horizontal Center | 555mm |
| Head Tube Angle | 71.5deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 150mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 296mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 435.2mm |
| Front-Center | 610.3mm |
| Front-Center Horizontal | 606.8mm |
| Wheelbase | 1042mm |
| Fork Offset/Rake | 45mm |
| Fork Length, Unknown | 405mm |
| Trail | 73.3mm high |
| Mechanical Trail | 69.6mm |
| Wheel Flop | 22.1mm |
| Standover Height | 801.9mm |
| Tire to Pedal Spindle Distance With 172.5 mm cranks | 76.8mm |
| Pedal Spindle to Ground Clearance With 172.5 mm cranks | 123.5mm |
AL PRO Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 50mm |
| Tire Outer Diameter | 722mm |
| Bike Length with Tires | 1764mm |
| Crank Length | 172.5mm |
| Handlebar Width | 420mm |
| Stem Length | 80mm |
| Stem Angle | -6deg |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Aluminum |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 5 ft 8 in to 5 ft 10 in |
Source:https://www.bikesdirect.com/products/gravity/bike-packing-bikes/zilla-al-pro-bikepacking-gravel-bikes-adventure-road.htm