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Collado del Alguacil 2026: W/kg of the pros (Vuelta a España)
8.0 km · 755 m · 9.4 % · Summit 1819 m · Strava segment Estimate · howtoturnpro
Estimated from the climb time, the rider's weight and the climb profile. Against 55 efforts with a power meter the median error is 2.0 %. Method →
Vuelta a España 2026, stage 20 13
12 September 2026 · Race page →
| Rider | Team | Time | W/kg | W | VAM | km/h | Weight | measured |
|---|---|---|---|---|---|---|---|---|
| Clément Berthet | Groupama-FDJ United | 28:29 | 5.42 | 369 | 1590 | 16.9 | 68 kg A | — |
| Harold Tejada | XDS Astana | 28:58 | 5.38 | 339 | 1564 | 16.6 | 63 kg A | — |
| Tobias Halland Johannessen | Uno-X Mobility | 29:14 | 5.34 | 331 | 1550 | 16.4 | 62 kg B | — |
| Kevin Vermaerke | UAE Team Emirates-XRG | 29:48 | 5.17 | 347 | 1520 | 16.1 | 67 kg A | — |
| Ramses Debruyne | Alpecin-Premier Tech | 29:58 | 5.15 | 340 | 1512 | 16.0 | 66 kg B | measured: 377 W |
| Sepp Kuss | Visma | Lease a Bike | 30:08 | 5.17 | 315 | 1503 | 15.9 | 61 kg B | — |
| Lorenzo Fortunato | XDS Astana | 30:30 | 5.17 | 295 | 1485 | 15.8 | 57 kg A | — |
| Mario Aparicio | Burgos-Burpellet BH | 31:16 | — | — | — | — | — | |
| Léo Bisiaux | Decathlon CMA CGM | 32:02 | 4.89 | 283 | 1414 | 15.0 | 58 kg A | — |
| Will Barta | Tudor Pro Cycling | 32:16 | — | — | — | — | — | |
| Emanuel Buchmann | Cofidis | 32:38 | 4.78 | 282 | 1388 | 14.7 | 59 kg B | measured: 305 W |
| Koen Bouwman | Jayco AlUla | 33:57 | 4.57* | 274 | 1334 | 14.2 | 60 kg C | — |
| Hannes Wilksch | Tudor Pro Cycling | 33:59 | — | — | — | — | — |
Riders who don't share their rides publicly are missing. This is not a stage result.
How long would it take you?
Your time up Collado del Alguacil at a steady power, from a physics model.
Advanced: rolling resistance and drag
Estimate from a physics model (Martin et al. 1998), on the average gradient. Wind, surface, pacing and steep sections change the real time. More cycling tools
How this is calculated
P × 0.977 = ½ · ρ · CdA · v³ + v · m · g · (sin θ + Crr · cos θ), θ = arctan(average gradient), m = rider + bike, g = 9.81; solved for the speed v, time = length / v. Air density ρ: NASA GRC troposphere: T=15.04-0.00649*h; p=101.29*((T+273.1)/288.08)^5.256; rho=p/(0.2869*(T+273.1)); h = mean of start and summit altitude. Sources: Martin et al. 1998, J Appl Biomech 14(3):276-291 — https://collections.lib.utah.edu/ark:/87278/s6jd5f71; Defraeye et al. 2010, J Biomech 43(7):1262-1268 (upright position, cyclist+bike 0.270 m2) — https://lirias.kuleuven.be/retrieve/232736; NASA Glenn Research Center, Earth Atmosphere Model (metric) — https://www.grc.nasa.gov/www/k-12/airplane/atmosmet.html. Climb geometry: the side's source in the table above.
Questions
How many watts did Clément Berthet push on Collado del Alguacil?
Clément Berthet climbed Collado del Alguacil in 28:29 at the Vuelta a España 2026. We estimate 369 W, or 5.42 W/kg at 68 kg. It is our estimate, not a measurement.
How is this estimated?
From the climb time, the rider's weight and the climb profile: the power needed against gravity, rolling resistance and air drag, with no wind. Against 55 efforts with a power meter the median error is 2.0 %.
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