Signal quality breakdown

These are the main factors behind QC confidence and rejection. Thresholds are heuristic; use them to guide selection + data cleanup.

Driver	Value	Status	Notes / quick fixes
Confidence score	0.85	good	Low confidence often correlates with low straight time, unstable pacing, or many rejected samples.
Samples excluded	5%	good	If high: tighten selection, exclude bad laps, and re-run QC/analyze.
Inconsistent laps	6 (22%)	high	If unstable: check pacing, sensor dropouts, and avoid corners/traffic in the selection.
Straight time (effective)	121 s	good	If low: widen selection to include more straights, or capture more clean laps.
Straight coverage	1559 m	good	More straight distance generally improves confidence and stability.
Corner coverage	4791 m	—	Turns often bias CdA high; heavy corner time can hurt quality unless handled explicitly.
Included distance/laps	6350 m • 27 laps	—	If low: widen selection or include more clean laps.
Solver samples used	525 (S 122, C 403)	—	If low: exclusions/selection/steady-gate may have removed too much data.
Sample interval	1.00 s (IQR 0.00s)	ok	Irregular or low sample rate can reduce confidence and increase quantization artifacts.
Missing samples	speed 0.0% • power 0.2%	good	Dropouts often explain unstable laps and high rejection.
Quantization step	power ~7 W • speed ~0.050 m/s	watch	Large steps can create “blocky” data and inflate residuals. Try: increase recording rate, disable device smoothing, and verify the source sensor (power meter vs trainer) isn’t heavily filtered. If power step is big: check whether the device is rounding/averaging power (e.g., 3s/10s display smoothing shouldn’t affect recording, but some devices do). If speed step is big: prefer wheel-speed sensor over GPS speed (especially indoors/velodrome).
Data quality lap flags	dropouts 0 · spikes 0 · outliers 3	bad	Dropouts/spikes/outliers can sink confidence even if the lap “looks fine.” Consider excluding those laps.
Segment coverage	4/4	full	Missing segments can reduce stability/coverage. Aim for clean laps across the full track when possible.

Definitions (what these numbers mean)

Field	Meaning
Drag (CdA)	Average of per-sample instantaneous CdA values computed from a power-balance model with fixed Crr (and drivetrain loss). Uses only samples that pass exclusions (and optional steady gate). Units: m².
Drag — straights / corners	Same CdA computation as “CdA total”, but averaged over samples labeled straight vs corner by the track segmentation. Useful to spot corner artifacts vs stable straights.
Rolling resistance (Crr)	Rolling resistance coefficient held constant during the solve. It may come from a per-run override; otherwise a tire library/manual point is used when available. CdA is estimated while Crr stays fixed.
Uncertainty / CI95	Two different things may appear: (1) CI95 is a bootstrap interval from solver_uncertainty_v2, resampling per-lap mean instantaneous CdA (1500 resamples, 95% interval). (2) Legacy “uncertainty” is a simple spread (std dev) of instantaneous CdA samples and is not a confidence interval.
Samples used	Counts from solver_sample_counts: total FIT samples, after exclusions, and the final number used by the solver (plus straight vs corner used).
Solver mode / steady gate	The mode can enable a “steady gate” that discards samples with large power ramps or speed changes (dp/dt and dv/dt thresholds), strong braking, and a short ignore window after a major power change. removed_frac is the fraction removed; the gate may fall back to disabled if it would remove too much.
CdA-inst stats	Diagnostics for instantaneous CdA on included samples: median plus dispersion (MAD/IQR). These are computed after masking invalid/out-of-bounds CdA values (e.g., non-finite or outside a plausible range).
Robust (straights)	A diagnostics-only straight fit stored in robust_v1: confidence-weighted IRLS (Huber) regression in wheel-power space on straight-labeled samples. It does not replace the reported CdA columns.
Rejected / residual / time used	Robust diagnostics: pct_rejected is mainly gating (not corners / below mins / below conf_min) and equals 1 - n_used/n_total. residual_metric is a robust residual scale (≈watts) from the straight-fit model (lower is better). straight_time_used_s summarizes how much time had non-zero fit weight.
Predicted power	Modeled steady-state (flat, no wind) power at fixed speeds using the run’s solved CdA total + fixed Crr and drivetrain loss. Useful for comparing “how fast this setup feels” on a common baseline.
Reference power table	Saved speed→power mapping built from the same steady-state model as Predicted power (CdA, fixed Crr, air density, mass, drivetrain loss) for consistent later comparisons.

Math & inputs (transparency)

Power balance (conceptual)

We fit CdA from the FIT data using a simplified steady-state balance. At a given speed v (m/s):

P_aero = 0.5 × ρ × CdA × v³

P_roll ≈ Crr × m × g × v

(plus small terms for grade/acceleration/drivetrain depending on the solver configuration)

What you’re seeing on this page

CdA/Crr above are run-averaged solver outputs; the predicted-power bars come from the solver’s reference-speed table.

Ride data

Run details (setup, notes, tires, photos)

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Tires (stored on run)

Select the run’s front/rear tire library entries. The setup editor also has “Tire front / Tire rear” fields for descriptive notes.

Front tire

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Suggested

Continental GP5000 TR Clear

(not set) #3 — Bontrager Aeolus RSL TLR 26mm — Crr 0.00305 #4 — Cadex Race Tubeless TLR 23mm — Crr 0.00464 #5 — Challenge Record C 23mm — Crr 0.00432 #14 — Continental Aero 111 TLR 26mm — Crr 0.00297 #11 — Continental GP Attack 3 C 23mm — Crr 0.00265 #15 — Continental GP4000 C 23mm — Crr 0.00324 #13 — Continental GP5000 C 23mm — Crr 0.00284 #9 — Continental GP5000 C 25mm — Crr 0.00261 #12 — Continental GP5000 TLR 25mm — Crr 0.00273 #7 — Continental GP5000 TT TL 25mm — Crr 0.00222 #10 — Continental GP5000S TR 25mm — Crr 0.00262 #8 — Continental GPTT C 23mm — Crr 0.00255 #6 — Continental Supersonic C 23mm — Crr 0.00217 #16 — ENVE SES TLR 25mm — Crr 0.00339 #1 — ExampleCo Track Pro 23mm — Crr 0.00400 #17 — Goodyear Eagle F1 Supersport C 25mm — Crr 0.00290 #18 — Goodyear Eagle F1 Supersport TLR 25mm — Crr 0.00351 #19 — Hutchinson Fusion 5 Perf TLR 25mm — Crr 0.00363 #20 — IRC Aspite Pro RBCC 24mm — Crr 0.00419 #21 — Maxxis High Road SL C 25mm — Crr 0.00296 #22 — Maxxis High Road TLR 25mm — Crr 0.00404 #26 — Michelin Power Cup C 23mm — Crr 0.00254 #25 — Michelin Power Cup C 25mm — Crr 0.00251 #27 — Michelin Power Cup TLR 25mm — Crr 0.00264 #28 — Michelin Power Road C 23mm — Crr 0.00310 #24 — Michelin Power TT C 23mm — Crr 0.00246 #23 — Michelin Power TT C 25mm — Crr 0.00213 #29 — Panaracer Race A Evo 4 C 25mm — Crr 0.00411 #31 — Pirelli P Zero Race SL TLR 26mm — Crr 0.00301 #33 — Pirelli P Zero Race TLR 25mm — Crr 0.00341 #30 — Pirelli P Zero TT C 23mm — Crr 0.00234 #32 — Pirelli P Zero Velo SL TLR 26mm — Crr 0.00304 #35 — Schwalbe Pro One TLR 25mm — Crr 0.00320 #34 — Schwalbe Pro One TT TLR 25mm — Crr 0.00240 #37 — Specialized 2Bliss TLR 26mm — Crr 0.00319 #36 — Specialized Turbo Cotton C 24mm — Crr 0.00245 #38 — Tufo Calibra Light C 23mm — Crr 0.00235 #39 — Tufo Calibra Plus C 23mm — Crr 0.00359 #44 — Veloflex Corsa EVO TLR 25mm — Crr 0.00324 #43 — Veloflex Corsa Race TLR 25mm — Crr 0.00299 #45 — Veloflex Master C 23mm — Crr 0.00355 #40 — Veloflex Record C 25mm — Crr 0.00193 #42 — Veloflex Record C 2022 23mm — Crr 0.00204 #41 — Veloflex Record TLR 25mm — Crr 0.00198 #53 — Vittoria Corsa G+ 2.0 TLR 25mm — Crr 0.00379 #52 — Vittoria Corsa NEXT TLR 24mm — Crr 0.00367 #47 — Vittoria Corsa Pro Speed TLR 24mm — Crr 0.00197 #46 — Vittoria Corsa Pro Speed TLR 26mm — Crr 0.00196 #51 — Vittoria Corsa Pro TLR 24mm — Crr 0.00272 #50 — Vittoria Corsa Pro TLR 26mm — Crr 0.00261 #49 — Vittoria Corsa Speed TLR 23mm — Crr 0.00206 #48 — Vittoria Corsa Speed TLR 25mm — Crr 0.00204 #54 — Wolfpack Race Cotton C 24mm — Crr 0.00312 #55 — Zipp Tangente Speed TLR 25mm — Crr 0.00292

Rear tire

Search

Suggested

Continental GP5000 TR Clear

(not set) #3 — Bontrager Aeolus RSL TLR 26mm — Crr 0.00305 #4 — Cadex Race Tubeless TLR 23mm — Crr 0.00464 #5 — Challenge Record C 23mm — Crr 0.00432 #14 — Continental Aero 111 TLR 26mm — Crr 0.00297 #11 — Continental GP Attack 3 C 23mm — Crr 0.00265 #15 — Continental GP4000 C 23mm — Crr 0.00324 #13 — Continental GP5000 C 23mm — Crr 0.00284 #9 — Continental GP5000 C 25mm — Crr 0.00261 #12 — Continental GP5000 TLR 25mm — Crr 0.00273 #7 — Continental GP5000 TT TL 25mm — Crr 0.00222 #10 — Continental GP5000S TR 25mm — Crr 0.00262 #8 — Continental GPTT C 23mm — Crr 0.00255 #6 — Continental Supersonic C 23mm — Crr 0.00217 #16 — ENVE SES TLR 25mm — Crr 0.00339 #1 — ExampleCo Track Pro 23mm — Crr 0.00400 #17 — Goodyear Eagle F1 Supersport C 25mm — Crr 0.00290 #18 — Goodyear Eagle F1 Supersport TLR 25mm — Crr 0.00351 #19 — Hutchinson Fusion 5 Perf TLR 25mm — Crr 0.00363 #20 — IRC Aspite Pro RBCC 24mm — Crr 0.00419 #21 — Maxxis High Road SL C 25mm — Crr 0.00296 #22 — Maxxis High Road TLR 25mm — Crr 0.00404 #26 — Michelin Power Cup C 23mm — Crr 0.00254 #25 — Michelin Power Cup C 25mm — Crr 0.00251 #27 — Michelin Power Cup TLR 25mm — Crr 0.00264 #28 — Michelin Power Road C 23mm — Crr 0.00310 #24 — Michelin Power TT C 23mm — Crr 0.00246 #23 — Michelin Power TT C 25mm — Crr 0.00213 #29 — Panaracer Race A Evo 4 C 25mm — Crr 0.00411 #31 — Pirelli P Zero Race SL TLR 26mm — Crr 0.00301 #33 — Pirelli P Zero Race TLR 25mm — Crr 0.00341 #30 — Pirelli P Zero TT C 23mm — Crr 0.00234 #32 — Pirelli P Zero Velo SL TLR 26mm — Crr 0.00304 #35 — Schwalbe Pro One TLR 25mm — Crr 0.00320 #34 — Schwalbe Pro One TT TLR 25mm — Crr 0.00240 #37 — Specialized 2Bliss TLR 26mm — Crr 0.00319 #36 — Specialized Turbo Cotton C 24mm — Crr 0.00245 #38 — Tufo Calibra Light C 23mm — Crr 0.00235 #39 — Tufo Calibra Plus C 23mm — Crr 0.00359 #44 — Veloflex Corsa EVO TLR 25mm — Crr 0.00324 #43 — Veloflex Corsa Race TLR 25mm — Crr 0.00299 #45 — Veloflex Master C 23mm — Crr 0.00355 #40 — Veloflex Record C 25mm — Crr 0.00193 #42 — Veloflex Record C 2022 23mm — Crr 0.00204 #41 — Veloflex Record TLR 25mm — Crr 0.00198 #53 — Vittoria Corsa G+ 2.0 TLR 25mm — Crr 0.00379 #52 — Vittoria Corsa NEXT TLR 24mm — Crr 0.00367 #47 — Vittoria Corsa Pro Speed TLR 24mm — Crr 0.00197 #46 — Vittoria Corsa Pro Speed TLR 26mm — Crr 0.00196 #51 — Vittoria Corsa Pro TLR 24mm — Crr 0.00272 #50 — Vittoria Corsa Pro TLR 26mm — Crr 0.00261 #49 — Vittoria Corsa Speed TLR 23mm — Crr 0.00206 #48 — Vittoria Corsa Speed TLR 25mm — Crr 0.00204 #54 — Wolfpack Race Cotton C 24mm — Crr 0.00312 #55 — Zipp Tangente Speed TLR 25mm — Crr 0.00292

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Initial Crr

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Notes

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{
  "created_at": "2026-05-07 14:39:14",
  "finalized_at": null,
  "has_tire_front_rear": true,
  "is_finalized": false,
  "notes": null,
  "revision_number": 1,
  "revision_of_run_id": null,
  "run_id": 182,
  "run_label": null,
  "session_id": 99,
  "status": "analyzed",
  "tire_front_id": null,
  "tire_front_name": null,
  "tire_id": null,
  "tire_name": null,
  "tire_rear_id": null,
  "tire_rear_name": null,
  "tires_label": null
}

(none)