2018 Kona Bicycle Company Kahuna Base
- Category
- Hardtail Cross-country MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Suspension
- 100mm fork travel
- Features
- Disc brake
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat aggressive stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
S | M | L | XL | |
Stack | 606mm | 616mm | 625mm | 634mm |
Reach | 404mm | 428mm | 453mm | 484mm |
Stack to Reach Ratio | 1.5:1 | 1.44:1 | 1.38:1 | 1.31:1 |
Seat Tube Length, C-T | 370mm | 420mm | 470mm | 530mm |
Top Tube Length, Effective/Horizontal Center | 578mm | 605mm | 632mm | 666mm |
Top Tube Slope | 26.3deg | 21.3deg | 16.6deg | 11.2deg |
Head Tube Angle | 69deg | 69deg | 69deg | 69deg |
Seat Tube Angle | 74deg | 74deg | 74deg | 74deg |
Head Tube Length | 95mm | 105mm | 115mm | 125mm |
Bottom Bracket Drop | 60mm | 60mm | 60mm | 60mm |
Bottom Bracket Height | 308.2mm | 308.2mm | 308.2mm | 308.2mm |
Chainstay Length | 450mm | 450mm | 450mm | 450mm |
Chainstay Length Horizontal | 446mm | 446mm | 446mm | 446mm |
Front-Center | 671mm | 699mm | 727mm | 761mm |
Front-Center Horizontal | 668mm | 696mm | 725mm | 759mm |
Wheelbase | 1114mm | 1142mm | 1171mm | 1205mm |
Fork Offset/Rake | 51mm | 51mm | 51mm | 51mm |
Fork Length (On-Axis) | 505mm | 505mm | 505mm | 505mm |
Trail | 86.7mm very high | 86.7mm very high | 86.7mm very high | 86.7mm very high |
Mechanical Trail | 80.9mm | 80.9mm | 80.9mm | 80.9mm |
Wheel Flop | 29mm | 29mm | 29mm | 29mm |
Standover Height | 730mm | 735mm | 740mm | 760mm |
Tire to Pedal Spindle | 132.9mm 170 mm cranks | 160.9mm 170 mm cranks | 188.9mm 170 mm cranks | 222.9mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 138.2mm 170 mm cranks | 138.2mm 170 mm cranks | 138.2mm 170 mm cranks | 138.2mm 170 mm cranks |
Base Build
S | M | L | XL | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.25in | 2.25in | 2.25in | 2.25in |
Tire Width Max | — | — | — | 2.4in |
Tire Outer Diameter | 736.3mm | 736.3mm | 736.3mm | 736.3mm |
Bike Length with Tires | 1850.3mm | 1878.3mm | 1907.3mm | 1941.3mm |
Stack and Reach vs. Category Trend
Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive
The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.
Learn more about the Upright/Aggressive ScaleCategory Trend
Hardtail Cross-country MTBSource:99spokes.com