2025 Gravity Zilla AL PRO 56cm
Build
700C/29 in × 50 mm
Insights
Somewhat upright stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Gravity Zilla
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 614.6mm |
| Reach | 381.9mm |
| Stack to Reach Ratio | 1.61:1 |
| Seat Tube Length, C-T | 560mm |
| Top Tube Length, Effective/Horizontal Center | 570mm |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 170mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 296mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 435.2mm |
| Front-Center | 611.3mm |
| Front-Center Horizontal | 607.8mm |
| Wheelbase | 1043mm |
| Fork Offset/Rake | 45mm |
| Fork Length, Unknown | 405mm |
| Trail | 70mm high |
| Mechanical Trail | 66.6mm |
| Wheel Flop | 20.6mm |
| Standover Height | 821.9mm |
| Tire to Pedal Spindle Distance With 175 mm cranks | 75.3mm |
| Pedal Spindle to Ground Clearance With 175 mm cranks | 121mm |
AL PRO Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 50mm |
| Tire Outer Diameter | 722mm |
| Bike Length with Tires | 1765mm |
| Crank Length | 175mm |
| Handlebar Width | 440mm |
| Stem Length | 90mm |
| 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 10 in to 6 ft 0 in |
Source:https://www.bikesdirect.com/products/gravity/bike-packing-bikes/zilla-al-pro-bikepacking-gravel-bikes-adventure-road.htm