2023 Author Ultrasonic 27,5
- Category
- Kids MTB
- Design
- Flat Bar, Hardtail (Front suspension)
Geometry
14" | 16" | |
Stack | 575mm | 582mm |
Reach | 385mm | 403mm |
Stack to Reach Ratio | 1.49:1 | 1.44:1 |
Seat Tube Length, C-T | 356mm | 406mm |
Top Tube Length, Effective/Horizontal HT Top | 550mm | 575mm |
Top Tube Length, Actual C-C | 544mm | 557mm |
Head Tube Angle | 69deg | 69.5deg |
Effective Seat Tube Angle, Seat Tube Top | 74deg | 73.5deg |
Head Tube Length | 110mm | 115mm |
Bottom Bracket Drop | 45mm | 45mm |
Bottom Bracket Height | 297.8mm | 297.8mm |
Chainstay Length | 420mm | 420mm |
Chainstay Length Horizontal | 417.6mm | 417.6mm |
Front-Center | 636mm | 651mm |
Front-Center Horizontal | 634.4mm | 649.4mm |
Wheelbase | 1052mm | 1067mm |
Fork Offset/Rake | 43mm | 43mm |
Fork Length (On-Axis) | 475mm | 475mm |
Trail | 85.5mm very high | 82.3mm very high |
Mechanical Trail | 79.9mm | 77.1mm |
Wheel Flop | 28.6mm | 27mm |
Tire to Pedal Spindle | 123.2mm 170 mm cranks | 138.2mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 127.8mm 170 mm cranks | 127.8mm 170 mm cranks |
27,5 Build
14" | 16" | |
Wheel Size | 650B/27.5 in 584 mm BSD | 650B/27.5 in 584 mm BSD |
Tire Width | 2in | 2in |
Tire Width Max | 2.2in | 2.2in |
Tire Outer Diameter | 685.6mm | 685.6mm |
Bike Length with Tires | 1737.6mm | 1752.6mm |
Published Sizing Recommendations
Height | 140 cm to 158 cm | 155 cm to 170 cm |
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
Kids MTBSource:https://cz.author.eu/ultrasonic-27-5-2023-ua42944100#!technicka-specifikace