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Tarmac SL8 Pro Force AXS E1 Bicycle
Description
Race bike development has narrowed to marginal gains—a few watts here, a handful of grams there—yet the Tarmac SL8 Pro represents more than incremental refinement over the platform it replaces. Drawing on lessons from the featherweight Aethos, Specialized built the SL8 to reach the UCI minimum weight with a full aero setup, with the range-topping S-Works frame claimed at 685 grams in a size 56. This Pro build uses the FACT 10r carbon layup rather than the S-Works 12r, a construction that trims material where loading allows while holding the stiffness needed to translate power into forward motion without flex-induced losses.
The geometry follows Specialized's Rider-First Engineered philosophy, tuning tube diameters, carbon layup, and wall thickness across the size range so smaller frames ride with a stiffness-to-compliance balance comparable to larger ones. The result is a bike that Specialized positions as stiffer at the pedals and more precise at the bars, paired with a compliant ride in the saddle. In the saddle the SL8 delivers 6% more compliance than the SL7, and its geometry and 32mm tire clearance are identical to the SL7, allowing higher-volume tires when the road roughens.
Aerodynamics received equal attention. Specialized calls the SL8 its most aerodynamic road bike, claiming it is faster than the Venge. A reshaped nose cone Specialized calls the Speed Sniffer optimizes clean air at the leading edge, and moving the steer tube back sharpens the head tube's leading edge for a lower-drag shape. A narrow seatpost, made possible by revised UCI rules, helps air move more cleanly around the legs. The clean internal routing keeps the front end free of exposed housing at speed.... Read More
Features
- Tarmac SL8 FACT 10r carbon frame with Rider-First Engineered construction
- SRAM Force eTap AXS 12-speed wireless electronic shifting
- SRAM Force DUB power meter crankset, 48/35T chainrings
- 10-33T 12-speed cassette
- SRAM Force hydraulic disc brakes with 160mm rotors
- Roval Rapide CL II wheels, 51mm front / 60mm rear depth, 21mm internal width
- DT Swiss 350 hubs with DT Swiss Revolution spokes
- Tubeless-ready, 32mm tire clearance
- Roval Rapide carbon handlebar with alloy SL7 stem
- Body Geometry Power saddle
- Threaded bottom bracket, 12x142mm rear thru-axle, flat-mount disc
Geometry
| Size | 44cm | 49cm | 52cm | 54cm | 56cm | 58cm | 59cm | 61cm |
|---|---|---|---|---|---|---|---|---|
| Wheel Size | 700 | 700 | 700 | 700 | 700 | 700 | 700 | 700 |
| Stack | 491mm | 504mm | 517mm | 534mm | 555mm | 581mm | 568mm | 602mm |
| Reach | 369mm | 378mm | 383mm | 387mm | 398mm | 405mm | 413mm | 411mm |
| Head Angle | 70.5° | 71.75° | 72.5° | 73° | 73.5° | 73.5° | 73° | 73° |
| Seat Angle | 75.5° | 75.5° | 74° | 74° | 73.5° | 73.5° | 73.5° | 73° |
| Top Tube Length | 496mm | 509mm | 531mm | 541mm | 563mm | 577mm | 587mm | 595mm |
| Head Tube Length | 93mm | 102mm | 113mm | 131mm | 151mm | 178mm | 163mm | 198mm |
| Standover | 723mm | 735mm | 746mm | 768mm | 786mm | 808mm | 809mm | 834mm |
| Fork Trail | 71mm | 63mm | 58mm | 58mm | 55mm | 55mm | 55mm | 52mm |
| Fork Offset | 47mm | 47mm | 47mm | 44mm | 44mm | 44mm | 44mm | 44mm |
| Bottom Bracket Drop | 74mm | 74mm | 74mm | 72mm | 72mm | 72mm | 72mm | 72mm |
| Front Center | 572mm | 574mm | 577mm | 579mm | 592mm | 606mm | 610mm | 613mm |
| Wheelbase | 970mm | 973mm | 975mm | 978mm | 991mm | 1006mm | 1009mm | 1013mm |
| Chainstay Length | 410mm | 410mm | 410mm | 410mm | 410mm | 410mm | 410mm | 410mm |





































