2026 UNIBIKE Viper Gts 21"
Build
700C/29 in × 47 mm
Stack and Reach vs. Category Trend
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Geometry
| Stack | 645mm |
| Reach | 415mm |
| Stack to Reach Ratio | 1.55:1 |
| Seat Tube Length, Unknown | 533mm |
| Top Tube Length, Effective/Horizontal Unknown | 610mm |
| Top Tube Slope | 12deg |
| Head Tube Angle | 70deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 165mm |
| Bottom Bracket Drop | 65mm |
| Bottom Bracket Height | 293mm |
| Chainstay Length | 455mm |
| Chainstay Length Horizontal | 450.3mm |
| Front-Center | 665mm |
| Front-Center Horizontal | 664.7mm |
| Wheelbase | 1115mm |
| Fork Offset/Rake | 36.2mm |
| Trail | 91.7mm very high |
| Mechanical Trail | 86.2mm |
| Wheel Flop | 29.5mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 137mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 123mm |
Gts Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 47mm |
| Tire Outer Diameter | 716mm |
| Bike Length with Tires | 1831mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Unknown |
| Fork Material | Unknown |
| Brake Type | Unknown |
Source:https://unibike.pl/rower/viper-gts/