Bike-on-Bike
Default Config
S
No Diagram
Default Config
Insights
Very upright stack and reach vs trend of endurance road bikes
Design deviates from other sizes of Specialized Bicycles Roubaix
Somewhat upright stack and reach vs trend of progressive gravel bikes
Design deviates from other sizes of LightCarbon LCG072-D
Geometry
Stack | 543mm | 547.3mm +4.3mm |
Reach | 353mm | 368mm +15mm |
Stack to Reach Ratio | 1.54:1 | 1.49:1 |
Seat Tube Length, C-TTT | 365mm | — |
Seat Tube Length, Effective Unknown | — | 480mm |
Top Tube Length, Effective/Horizontal Center | — | 525mm |
Top Tube Length, Effective/Horizontal HT Top | 503mm | — |
Top Tube Slope | 20.7deg | — |
Head Tube Angle | 69.3deg | 70.5deg +1.2deg |
Seat Tube Angle | 75deg | 74deg -1deg |
Head Tube Length | 90mm | 132mm +42mm |
Bottom Bracket Drop | 80mm | 79mm -1mm |
Bottom Bracket Height | 263mm | 282mm +19mm |
Chainstay Length | 418mm | 420mm +2mm |
Chainstay Length Horizontal | 410.3mm | 412.5mm +2.2mm |
Front-Center | 589mm | 593.7mm +4.7mm |
Front-Center Horizontal | 583.7mm | 591.5mm +7.8mm |
Wheelbase | 994mm | 1004mm +10mm |
Fork Offset/Rake | 52mm | 51.5mm -0.5mm |
Fork Length (On-Axis) | 375mm | 383mm +8mm |
Trail | 74mm high | 73.2mm -0.8mm high |
Mechanical Trail | 69.2mm | 69mm -0.2mm |
Wheel Flop | 24.5mm | 23mm -1.5mm |
Standover Height | 686mm | 769mm +83mm |
Tire to Pedal Spindle | 81mm 165 mm cranks | 62.7mm -18.3mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 98mm 165 mm cranks | 112mm +14mm 170 mm cranks |
Build
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 32mm | 50mm +18mm |
Tire Outer Diameter | 686mm | 722mm +36mm |
Bike Length with Tires | 1680mm | 1726mm +46mm |
Crank Length | 165mm | — |
Handlebar Width | 360mm | — |
Stem Length | 70mm | — |
| 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 | Disc | Disc |
Meta
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| Source | https://www.specialized.com/it/it/roubaix-sl8-pro-sram-force-axs-/p/4221819?color=5383387-4221819&searchText=94426-1056 | https://de.lightcarbon.com/uploadfile/downloads/2026-2027%20LightCarbon%20Frame+Component%20Catalog%20-V1.pdf |
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