Bike-on-Bike
Default Config
Default Config
Insights
Somewhat aggressive stack and reach vs trend of performance road bikes
Design deviates from other sizes of SEKA Spear
Average stack and reach vs trend of performance road bikes
Design deviates from other sizes of Specialized Bicycles Tarmac sl8
Geometry
Stack | 560mm | 565mm +5mm |
Reach | 397mm | 395mm -2mm |
Stack to Reach Ratio | 1.41:1 | 1.43:1 |
Seat Tube Length, C-T | 496mm | — |
Seat Tube Length, Unknown | — | 494mm |
Top Tube Length, Effective/Horizontal Center | 544mm | 563mm +19mm |
Top Tube Slope | 8.9deg | 9.7deg +0.8deg |
Head Tube Angle | 73.1deg | 73.5deg +0.4deg |
Seat Tube Angle | 73.5deg | 73.5deg +0deg |
Head Tube Length | 153mm | 157mm +4mm |
Bottom Bracket Drop | 72mm | 72mm +0mm |
Bottom Bracket Height | 267mm | 265mm -2mm |
Chainstay Length | 410mm | 410mm +0mm |
Chainstay Length Horizontal | 403.6mm | 403.6mm +0mm |
Front-Center | 595.7mm | 592mm -3.7mm |
Front-Center Horizontal | 591.4mm | 587.4mm -4mm |
Wheelbase | 995mm | 991mm -4mm |
Fork Offset/Rake | 44mm | 44.4mm +0.4mm |
Fork Length (Axle-To-Crown) | 372mm | — |
Fork Length, Unknown | — | 370mm |
Trail | 57mm mid/neutral | 53.5mm -3.5mm mid/neutral |
Mechanical Trail | 54.6mm | 51.3mm -3.3mm |
Wheel Flop | 15.9mm | 14.6mm -1.3mm |
Standover Height | — | 786mm |
Tire to Pedal Spindle | 86.7mm 170 mm cranks | 85mm -1.7mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 97mm 170 mm cranks | 95mm -2mm 170 mm cranks |
Build
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 28mm | 26mm -2mm |
Tire Outer Diameter | 678mm | 674mm -4mm |
Bike Length with Tires | 1673mm | 1665mm -8mm |
Handlebar Width | — | 420mm |
Stem Length | — | 100mm |
| Suspension Type | Rigid, non-suspension corrected | Rigid, non-suspension corrected |
| Bar Type | Drop Bar | Drop Bar |
| Frame Material | Carbon/Composite | Carbon/Composite |
| Fork Material | Carbon/Composite | Carbon/Composite |
| Brake Type | Rim | Disc |
Meta
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| Source | https://www.sekabikes.com/spear-2/ | https://www.specialized.com/us/en/tarmac-sl8-pro-ultegra-di2/p/4274935?color=5430657-4274935 |
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