2004 Klein Bicycle Corporation Aura X
- Category
- Performance Road
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Aluminum
- Fork
- Carbon/Composite
- Features
- Rim brake
Geometry
58cm | 49cm | 52cm | 55cm | 61cm | |
Stack | 584mm | — | — | — | — |
Reach | 409mm | — | — | — | — |
Stack to Reach Ratio | 1.43:1 | — | — | — | — |
Seat Tube Length, Unknown | 510mm | 481mm | 485mm | 493mm | 537mm |
Top Tube Length, Effective/Horizontal Unknown | 585mm | 530mm | 545mm | 565mm | 605mm |
Top Tube Slope | 9deg | — | — | — | — |
Head Tube Angle | 73.5deg | 72deg | 72.5deg | 73deg | 73.5deg |
Seat Tube Angle | 73deg | 73.5deg | 73.5deg | 73deg | 72.5deg |
Head Tube Length | 173mm | 97mm | 118mm | 146mm | 204mm |
Bottom Bracket Drop | 73mm | 76mm | 76mm | 73mm | 71mm |
Bottom Bracket Height | 263mm | 260mm | 260mm | 263mm | 265mm |
Chainstay Length | 414mm | 414mm | 414mm | 414mm | 414mm |
Chainstay Length Horizontal | 407.5mm | 407mm | 407mm | 407.5mm | 407.9mm |
Front-Center | 606.9mm | 574.1mm | 585mm | 596mm | 621.2mm |
Front-Center Horizontal | 602.5mm | 569mm | 580mm | 591.5mm | 617.1mm |
Wheelbase | 1010mm | 976mm | 987mm | 999mm | 1025mm |
Fork Offset/Rake | 45mm | 45mm | 45mm | 45mm | 45mm |
Trail | 52.6mm mid/neutral | 61.9mm mid/neutral | 58.8mm mid/neutral | 55.7mm mid/neutral | 52.6mm mid/neutral |
Mechanical Trail | 50.4mm | 58.8mm | 56mm | 53.2mm | 50.4mm |
Wheel Flop | 14.3mm | 18.2mm | 16.9mm | 15.6mm | 14.3mm |
Standover Height | 760mm | 718mm | 726mm | 742mm | 786mm |
Tire to Pedal Spindle | 98.4mm 172.5 mm cranks | 68.1mm 170 mm cranks | 79mm 170 mm cranks | 87.5mm 172.5 mm cranks | 110.2mm 175 mm cranks |
Pedal Spindle to Ground Clearance | 90.5mm 172.5 mm cranks | 90mm 170 mm cranks | 90mm 170 mm cranks | 90.5mm 172.5 mm cranks | 90mm 175 mm cranks |
X Build
58cm | 49cm | 52cm | 55cm | 61cm | |
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 |
Tire Width | 25mm | 25mm | 25mm | 25mm | 25mm |
Tire Width Max | 25mm | 25mm | 25mm | 25mm | 25mm |
Tire Outer Diameter | 672mm | 672mm | 672mm | 672mm | 672mm |
Bike Length with Tires | 1682mm | 1648mm | 1659mm | 1671mm | 1697mm |
Crank Length | 172.5mm | 170mm | 170mm | 172.5mm | 175mm |
Handlebar Width | 440mm | 400mm | 400mm | 420mm | 460mm |
Stem Length | 110mm | 80mm | 80mm | 100mm | 110mm |
Stem Angle | 7deg | 7deg | 7deg | 7deg | 7deg |
Published Sizing Recommendations
Height | — | — | — | — | — |
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
Performance RoadSource:2004 Klein Specifications Manual, 58cm stack and reach by direct measurement