2025 Tunk Hike-Use Base 55
Build
650B/27.5 in × 42 mm
Insights
Design deviates from other sizes of Tunk Hike-Use
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 555mm |
| Reach | 365mm |
| Stack to Reach Ratio | 1.52:1 |
| Seat Tube Length, C-T | 574mm |
| Seat Tube Length, C-C | 544mm |
| Top Tube Length, Effective/Horizontal Center | 540mm |
| Top Tube Length, Actual C-C | 540mm |
| Top Tube Slope | 0deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 72.5deg |
| Head Tube Length | 149mm |
| Bottom Bracket Drop | 64mm |
| Bottom Bracket Height | 270mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 435.3mm |
| Front-Center | 596mm |
| Front-Center Horizontal | 592.6mm |
| Wheelbase | 1027.9mm |
| Fork Offset/Rake | 65mm |
| Fork Length (Axle-To-Crown) | 375mm |
| Trail | 40.2mm low |
| Mechanical Trail | 38.2mm |
| Wheel Flop | 11.8mm |
| Standover Height | 800mm |
| Tire to Pedal Spindle Distance With 165 mm cranks | 97mm |
| Pedal Spindle to Ground Clearance With 165 mm cranks | 105mm |
Base Build
| Wheel Size | 650B, 27.5 inch (584mm BSD) |
| Tire Width | 42mm |
| Tire Outer Diameter | 668mm |
| Bike Length with Tires | 1695.9mm |
| Crank Length | 165mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Steel |
| Fork Material | Steel |
| Brake Type | Rim |
Source:designer input