This is sample data

The ride behind this report was simulated, with the true answer set in advance. The rider and the track are fictional. The report was produced by the same analysis as a real one, so it shows how a result looks. It is no forecast of what a change will do for you.

The report itself appears in English, as athletes receive it today.

Aero report · Sample rider · Velodrome (simulated) · 16 October 2026

Sample session

Faster

Setup B saves you 17 W at 45.0 km/h

range 10–23 W

That is 62.8 s over your 40 km (range 38.1–87.8 s). Repeat runs confirmed it.

Race pace 45.0 km/h over 40 km, entered by your fitter for this session.

What changed. Head position: Upright to Tucked · Shoulder position: Relaxed to Rolled forward

Saved at 45.0 km/h

17 W

range 10–23 W

Time over 40 km

62.8 s

range 38.1–87.8 s

CdA, Setup B

0.212 m²

range 0.208–0.216 m²

6 runs

CdA, Baseline

0.225 m²

range 0.222–0.229 m²

7 runs · the reference

Under each figure the outlined bar is the range and the red tick the measured value. Watts and seconds start at zero on the left. On the tested setup's CdA rule the black tick is your baseline.

1.1

Every setup against your baseline

Every setup against your baseline
Setup	Result	CdA	Range	Saved at 45.0 km/h	Time over 40 km
Baseline7 runs	reference	0.225 m²	0.222–0.229 m²	the reference	the reference
Setup B (headline setup)6 runs	faster	0.212 m²	0.208–0.216 m²	17 W(10–23 W)	62.8 s(38.1–87.8 s)

CdA is your drag area in square metres: lower means less drag. The range shows how far each number could move with more laps.

1.2

Which setup has the least drag

Setup comparison: the CdA of each setup with its range

Setup B measured 0.014 m² lower than the baseline (range 0.008 to 0.019 lower).
Setup	CdA	Range	Change against baseline	Runs	Verdict
Baseline	0.225 m²	0.222–0.229 m²	reference	7	reference
Setup B	0.212 m²	0.208–0.216 m²	−0.014 m² (range 0.008 to 0.019 lower)	6	faster

Diamond: the baseline
Downward triangle: faster
Ring: the headline setup
Numbered disc: the note of that number below
Band: the range
Dashed line: the baseline CdA

No noise band: not measured at this track.
Setup B is the headline setup: the result this report leads with.

1.3

What it is worth

Race pace 45.0 km/h over 40 km, entered by your fitter for this session.

What it is worth: watts Setup B saves at each speed, with its range

At 45.0 km/h Setup B saves 17 W (range 10–23 W): 62.8 s over 40 km.
Speed	Watts saved	Range
35.0 km/h	8 W	5–11 W
40.0 km/h	12 W	7–16 W
45.0 km/h	17 W	10–23 W
50.0 km/h	23 W	14–31 W
55.0 km/h	30 W	18–42 W

Line: watts saved at each speed
Band: the range
Red ring: the saving at your race pace
Grey bar with caps: the range at that pace
Red tick in the strip: seconds saved over 40 km
Numbered disc: the note of that number below

At your race pace of 45.0 km/h, Setup B saves 17 W (range 10–23 W).
62.8 s saved over 40 km (range 38.1–87.8 s).
At the fastest speed shown, 55.0 km/h, Setup B saves 30 W (range 18–42 W).

1.4

How consistent were the laps

Show the lap-by-lap check

How consistent were the laps: each run's lap estimates, its CdA and its range

Lap estimates, CdA and range for each of 13 runs. Each run's range also allows for uncertainty in the power meter's timing. Some runs' ranges also allow for slow drift during the run. Every range is wider than the lap estimates alone would make it.
Run	Setup	Laps	Run CdA	Range
Run 1	Baseline	8 laps	0.226 m²	0.214–0.237 m²
Run 3	Baseline	8 laps	0.229 m²	0.219–0.239 m²
Run 5	Baseline	8 laps	0.222 m²	0.209–0.234 m²
Run 7	Baseline	8 laps	0.227 m²	0.214–0.240 m²
Run 9	Baseline	8 laps	0.227 m²	0.217–0.237 m²
Run 11	Baseline	8 laps	0.226 m²	0.216–0.237 m²
Run 13	Baseline	8 laps	0.221 m²	0.209–0.234 m²
Run 2	Setup B	8 laps	0.215 m²	0.203–0.227 m²
Run 4	Setup B	8 laps	0.210 m²	0.203–0.218 m²
Run 6	Setup B	8 laps	0.212 m²	0.201–0.222 m²
Run 8	Setup B	8 laps	0.214 m²	0.202–0.225 m²
Run 10	Setup B	8 laps	0.210 m²	0.198–0.221 m²
Run 12	Setup B	8 laps	0.212 m²	0.201–0.224 m²

Dot: one lap estimate
Short line: the run's CdA
Band: the run's range
Numbered disc: the note of that number below

The band is the run's range: where its true CdA most likely sits. Its width comes from how much the lap estimates vary. Each run's range also allows for uncertainty in the power meter's timing. Some runs' ranges also allow for slow drift during the run. Every range is wider than the lap estimates alone would make it. Single lap estimates can still fall outside the band: each rests on one lap, while the band is for the whole run.

1.5

What happened in what order

Show the session timeline

Session timeline: each run's CdA and range in the order it was ridden

13 runs; baselines bracket every change; drift not assessed
Run	Setup	Time	CdA	Range	In the comparison
Run 1	Baseline	1.3 min	0.226 m²	0.214–0.237 m²	used
Run 2	Setup B	9.0 min	0.215 m²	0.203–0.227 m²	used
Run 3	Baseline	16.6 min	0.229 m²	0.219–0.239 m²	used
Run 4	Setup B	24.3 min	0.210 m²	0.203–0.218 m²	used
Run 5	Baseline	32.0 min	0.222 m²	0.209–0.234 m²	used
Run 6	Setup B	39.6 min	0.212 m²	0.201–0.222 m²	used
Run 7	Baseline	47.3 min	0.227 m²	0.214–0.240 m²	used
Run 8	Setup B	54.9 min	0.214 m²	0.202–0.225 m²	used
Run 9	Baseline	62.6 min	0.227 m²	0.217–0.237 m²	used
Run 10	Setup B	70.3 min	0.210 m²	0.198–0.221 m²	used
Run 11	Baseline	77.9 min	0.226 m²	0.216–0.237 m²	used
Run 12	Setup B	85.6 min	0.212 m²	0.201–0.224 m²	used
Run 13	Baseline	93.3 min	0.221 m²	0.209–0.234 m²	used

Diamond: Baseline
Square: Setup B
Vertical bar: the run's range
Dashed line: the baseline at each moment, joining the baseline runs
Shaded span: the confirmation runs

1.6

The run itself

Show this run's speed and power

Speed is the speed the measurement used; power is shown as recorded.

The run itself: speed and power through Run 12

8 laps; 37 straight samples measured. Speed is the speed the measurement used; power is shown as recorded.
Lap	Duration	Mean speed	Mean power	Included
Lap 1	20.0 s	45.2 km/h	281 W	yes
Lap 2	20.0 s	45.0 km/h	287 W	yes
Lap 3	20.0 s	45.0 km/h	284 W	yes
Lap 4	20.0 s	45.2 km/h	284 W	yes
Lap 5	20.0 s	45.1 km/h	292 W	yes
Lap 6	20.0 s	45.1 km/h	287 W	yes
Lap 7	20.0 s	45.1 km/h	290 W	yes
Lap 8	19.0 s	45.2 km/h	289 W	yes

Shaded, with a thick bar along the top: a straight
Thick line: samples the measurement used
Thin line: the rest of the run
Dashed line: crossing the line; the lap number sits above

1.7

Two labels you may see

Example only

E1Example setup

x.xxxcompare within this session

Its drag figure holds against the other setups from the same session. Measure again before you compare it with another day or track.

Example of the label. No setup in this report carries it.

E2Example setup

not measured.

Reason: too few clean laps to give a number. Your fitter can ride this setup again.

A setup that could not be measured shows no number at all. Example wording.

1.8

How to read this report

CdA: Your drag area in square metres. Lower means less drag. We show it to three decimals, always with its range.
Range: Where the true value most likely sits, given how much your laps varied. A wide range means the laps disagreed more.
Noise band: The smallest change this track can tell apart, measured on a calibration day. Until it is measured no band is drawn.
Baseline: The position you arrived in. Every watt and second in this report is measured against it.

2.1

What to do next

Ride the “Setup B” setup in training first, then race in it. Ask your fitter to write down the exact settings.

Re-test after any change to your position, bike or kit. Today's baseline makes the next comparison quicker.

2.2

How sure we are

Every result comes with a range. We are 95% sure the true change sits inside it, and that holds for all the setups at once. We call a setup faster or slower only when its whole range sits on one side of zero and the change is bigger than a set minimum. This track's own noise band is still to be measured, so until its calibration day that minimum is a provisional standard value. Everything else reads as no measurable difference.

About this test

Some ride data was patchy, with gaps or uneven recording. The result leans on the clean parts of each run, so treat fine differences with care.
Effort or position varied more than ideal during some runs. That adds noise, and it can hide small differences between setups.

Technical details

The raw numbers behind this report, for you and your fitter.

CdA (straights)	0.2124 m²
CdA (corners)	0.1969 m² · not aerodynamically interpretable: banking and lean are not modeled; repeatability tracking only
Crr	0.00400 · measured
Air density (rho)	1.199 kg/m³
Rider + bike mass	85.0 kg
QC grade	B
QC reason codes	MANY_UNSTABLE_LAPS, LOW_CONFIDENCE, UNSTABLE_POWER, POWER_VARIABILITY
Lap phase	lap trigger at the line
Protocol quality	0.36
What to change	too little of the run was usable: ride longer, or cleaner (150 s of straights used, 13% of samples kept)
Robust fit (IRLS) CdA	0.2124 m²
Virtual elevation (Chung) CdA	0.2128 m²
Method agreement	within the smallest detectable change
Config “Baseline” (baseline)	CdA 0.2255 m² · σ 0.0018 · 95% range 0.2218 to 0.2292 · runs 1, 3, 5, 7, 9, 11, 13
Config “Setup B”	CdA 0.2121 m² · σ 0.0019 · 95% range 0.2083 to 0.2159 · runs 2, 4, 6, 8, 10, 12
Setup B: Δ CdA vs baseline	−0.0137
Setup B: Δ CdA spread (1σ)	0.0027
Setup B: 95% simultaneous range	−0.0190 to −0.0084
Setup B: Degrees of freedom (df)	79.6
Setup B: Critical value	1.990
Setup B: Comparisons (m)	1
Setup B: Interval kind	simultaneous_95
Setup B: Drift bracketed	yes
Setup B: Outcome · confirmation	faster · confirmed

The answer that was planted

In the simulation, the change was set to alter drag by −5.5%. The report's 95% range for that change is −8.4% to −3.7%, and it contains the set value.

The simulated session rode the baseline at the start and at the end, alternated it with the change, and added a block of repeat runs before any gain was reported.

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