2015 Author Aura 55 Base
- Category
- Endurance Road
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Aluminum
- Fork
- Carbon/Composite
- Features
- Rim brake
Geometry
48 | 50 | 52 | 54 | 56 | 58 | |
Stack | 543.5mm | 557.8mm | 572.5mm | 587.9mm | 602.4mm | 616.4mm |
Reach | 373.2mm | 373.8mm | 377.4mm | 383.5mm | 389.6mm | 395mm |
Stack to Reach Ratio | 1.46:1 | 1.49:1 | 1.52:1 | 1.53:1 | 1.55:1 | 1.56:1 |
Seat Tube Length, C-T | 480mm | 500mm | 520mm | 540mm | 560mm | 580mm |
Seat Tube Length, C-C | 440mm | 460mm | 480mm | 500mm | 520mm | 540mm |
Top Tube Length, Effective/Horizontal Unknown | 525mm | 532mm | 542mm | 556mm | 570mm | 583mm |
Top Tube Length, Actual C-C | 512mm | 519mm | 529mm | 543mm | 556mm | 570mm |
Head Tube Angle | 71.5deg | 71.8deg | 72.2deg | 72.5deg | 72.8deg | 73deg |
Seat Tube Angle | 74.5deg | 74.2deg | 74deg | 73.7deg | 73.3deg | 73deg |
Head Tube Length | 125mm | 140mm | 155mm | 170mm | 185mm | 200mm |
Bottom Bracket Drop | 72mm | 71mm | 70mm | 70mm | 69mm | 68mm |
Bottom Bracket Height | 264mm | 265mm | 266mm | 266mm | 267mm | 268mm |
Chainstay Length | 410mm | 410mm | 410mm | 410mm | 410mm | 410mm |
Chainstay Length Horizontal | 403.6mm | 403.8mm | 404mm | 404mm | 404.2mm | 404.3mm |
Front-Center | 582.8mm | 585.5mm | 590.2mm | 598.1mm | 605.8mm | 613.5mm |
Front-Center Horizontal | 578.4mm | 581.2mm | 586mm | 594mm | 601.9mm | 609.7mm |
Wheelbase | 982mm | 985mm | 990mm | 998mm | 1006mm | 1014mm |
Fork Offset/Rake | 45mm | 45mm | 45mm | 45mm | 45mm | 45mm |
Fork Length, Unknown | 370mm | 370mm | 370mm | 370mm | 370mm | 370mm |
Trail | 65mm mid/neutral | 63.1mm mid/neutral | 60.6mm mid/neutral | 58.8mm mid/neutral | 56.9mm mid/neutral | 55.7mm mid/neutral |
Mechanical Trail | 61.6mm | 59.9mm | 57.7mm | 56mm | 54.4mm | 53.2mm |
Wheel Flop | 19.6mm | 18.7mm | 17.6mm | 16.9mm | 16.1mm | 15.6mm |
Tire to Pedal Spindle | 76.8mm 170 mm cranks | 79.5mm 170 mm cranks | 84.2mm 170 mm cranks | 92.1mm 170 mm cranks | 99.8mm 170 mm cranks | 107.5mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 94mm 170 mm cranks | 95mm 170 mm cranks | 96mm 170 mm cranks | 96mm 170 mm cranks | 97mm 170 mm cranks | 98mm 170 mm cranks |
Base Build
48 | 50 | 52 | 54 | 56 | 58 | |
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 | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 25mm | 25mm | 25mm | 25mm | 25mm | 25mm |
Tire Outer Diameter | 672mm | 672mm | 672mm | 672mm | 672mm | 672mm |
Bike Length with Tires | 1654mm | 1657mm | 1662mm | 1670mm | 1678mm | 1686mm |
Published Sizing Recommendations
Height | 154 cm to 162 cm | 160 cm to 170 cm | 168 cm to 178 cm | 176 cm to 188 cm | 186 cm to 195 cm | 193 cm to 202 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
Endurance RoadSource:https://en.author.eu/author-aura-55-2015-ua42838501