2020 AURUM Magma Base
- Category
- Performance Road
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Carbon/Composite
- Fork
- Carbon/Composite
- Features
- Disc brake
Geometry
50 | 52 | 54 | 56 | 58 | 61 | |
Stack | 505mm | 525mm | 545mm | 567mm | 589mm | 615mm |
Reach | 370mm | 376mm | 384mm | 392mm | 400mm | 408mm |
Stack to Reach Ratio | 1.36:1 | 1.4:1 | 1.42:1 | 1.45:1 | 1.47:1 | 1.51:1 |
Seat Tube Length, C-T | 453mm | 480mm | 504mm | 526mm | 547mm | 573mm |
Top Tube Length, Effective/Horizontal Unknown | 515mm | 536mm | 551mm | 565mm | 580mm | 596mm |
Top Tube Slope | 8deg | 7.3deg | 6.8deg | 6.7deg | 6.7deg | 6.6deg |
Head Tube Angle | 71.8deg | 71.6deg | 73deg | 73deg | 73deg | 73deg |
Seat Tube Angle | 74deg | 73deg | 73deg | 73deg | 73deg | 73deg |
Bottom Bracket Drop | 74mm | 71mm | 71mm | 71mm | 71mm | 71mm |
Bottom Bracket Height | 265mm | 268mm | 268mm | 268mm | 268mm | 268mm |
Chainstay Length | 407mm | 407mm | 410mm | 410mm | 410mm | 410mm |
Chainstay Length Horizontal | 400.2mm | 400.8mm | 403.8mm | 403.8mm | 403.8mm | 403.8mm |
Front-Center | 570mm | 584mm | 580mm | 594mm | 608mm | 624mm |
Front-Center Horizontal | 564.8mm | 579.2mm | 575.2mm | 589.2mm | 604.2mm | 620.2mm |
Wheelbase | 965mm | 980mm | 979mm | 993mm | 1008mm | 1024mm |
Fork Offset/Rake | 50mm | 50mm | 44mm | 44mm | 44mm | 44mm |
Trail | 58.8mm mid/neutral | 60.1mm mid/neutral | 57.6mm mid/neutral | 57.6mm mid/neutral | 57.6mm mid/neutral | 57.6mm mid/neutral |
Mechanical Trail | 55.9mm | 57mm | 55.1mm | 55.1mm | 55.1mm | 55.1mm |
Wheel Flop | 17.5mm | 18mm | 16.1mm | 16.1mm | 16.1mm | 16.1mm |
Standover Height | 728mm | 750mm | 782mm | 803mm | 826mm | 850mm |
Tire to Pedal Spindle | 61mm 170 mm cranks | 75mm 170 mm cranks | 71mm 170 mm cranks | 85mm 170 mm cranks | 99mm 170 mm cranks | 115mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 95mm 170 mm cranks | 98mm 170 mm cranks | 98mm 170 mm cranks | 98mm 170 mm cranks | 98mm 170 mm cranks | 98mm 170 mm cranks |
Base Build
50 | 52 | 54 | 56 | 58 | 61 | |
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 | 28mm | 28mm | 28mm | 28mm | 28mm | 28mm |
Tire Width Max | 30mm | 30mm | 30mm | 30mm | 30mm | 30mm |
Tire Outer Diameter | 678mm | 678mm | 678mm | 678mm | 678mm | 678mm |
Bike Length with Tires | 1643mm | 1658mm | 1657mm | 1671mm | 1686mm | 1702mm |
Published Sizing Recommendations
Height | 152 cm to 163 cm | 161 cm to 170 cm | 170 cm to 177 cm | 175 cm to 181 cm | 180 cm to 188 cm | 186 cm to 195 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
Performance RoadSource:https://aurumbikes.com/the-bike/#geometry-chart