Factor ONE vs Specialized Tarmac SL9 Specs and Price
The Factor ONE and the Specialized Tarmac SL9 represent two divergent approaches to the modern speed equation, balancing aerodynamics, compliance, and the UCI minimum weight threshold. Velo reported on October 19, 2026, that the Factor ONE ready-to-ride weight sits at 7.57 kilograms, compared to the Specialized Tarmac SL9 at 6.5 kilograms for a size 54.
Factor ONE and Specialized Tarmac SL9 Compare Specs and Price
The two machines command nearly identical price tags while utilizing distinctly different part specs. Velo reported that the Factor ONE retails for $14,199, equipped with a SRAM RED XPLR drivetrain featuring a 48t chainring and a 10-46 cassette, a size 1 proprietary bar-stem, ZIPP 454 NSW front and Zipp 858 NSW rear wheels, and Goodyear Eagle F1 R Z29 aero tires. The Specialized Tarmac SL9 costs $13,999, utilizing a SRAM RED drivetrain with a 50/37 chainring and a 10-36 cassette, a Roval Rapide cockpit with an integrated bar-stem, Roval Rapide CLX III wheels, and Specialized Cotton TLR 700×30 tires. Velo noted that the Factor ONE weighs 7.57 kg ready to ride without pedals, while the Tarmac SL9 comes in at 6.5 kg for a size 54 ready to ride without pedals.
| Component / Metric | Factor ONE | Specialized Tarmac SL9 |
|---|---|---|
| Price | $14,199 | $13,999 |
| Drivetrain | SRAM RED XPLR (48t, 10-46) | SRAM RED (50/37, 10-36) |
| Wheels | ZIPP 454 NSW / Zipp 858 NSW | Roval Rapide CLX III |
| Tires | Goodyear Eagle F1 R Z29 | Specialized Cotton TLR, 700×30 |
| Ready-to-Ride Weight | 7.57 kg | 6.5 kg (Size 54) |
Aerodynamic Priorities Versus Weight Compromises
For decades, bicycle speed relied primarily on minimizing mass to ease climbing efforts on steep gradients. Velo explained that modern computing power and algorithmic simulations now allow manufacturers to test complex tube shapes rapidly, shifting the performance priority heavily toward aerodynamics. However, this shift creates a design tension. Deeper aerodynamic tube shapes inherently add mass, creating a persistent compromise between wind-tunnel performance and the 6.8-kilogram UCI minimum weight limit.
Specialized engineers the Tarmac SL9 around race-winning scenarios rather than pursuing absolute aerodynamic supremacy in every individual metric. Velo reported that Specialized shapes the seatpost to use higher wind speeds near the rider's legs, yet accepts that the frame is not the most aerodynamic machine available. By keeping total weight near the UCI minimum limit, Specialized prioritizes an overall balance of handling, compliance, and climbing responsiveness.
Factor pursues a different structural hierarchy by prioritizing wind-tunnel aerodynamics first and allowing frame weight to settle where manufacturing physics dictate. Velo noted that the Factor ONE features progressive road geometry designed to rotate the rider forward around the bottom bracket.
On-Road Performance Characteristics
The distinct engineering philosophies manifest clearly during active riding. Velo described the Factor ONE as a machine that holds high speeds with notable stability, encouraging long stretches of steady pedaling rather than explosive, snappy acceleration. The frame is exceptionally stiff, transmitting road imperfections directly through both the front and rear tires.
The frame acts more like a spring under pedal input, encouraging frequent attacks and dynamic accelerations. Velo noted that the Tarmac excels in mountain terrain, providing a responsive climbing experience that benefits riders on sustained ascents.