ETENWOLF S6 Cordless Inflator Bicycle Tire Pressure Accuracy Test Report (Sample 1, Road Bike, 0–110 PSI)

Document Overview

Key Findings The ETENWOLF Vortex S6 heavy-duty cordless inflator (Sample 1) completed 36 road-bicycle inflation sequences spanning 0–110 PSI, with all stop-pressure overshoots and 10-second retention readings confirming the unit’s pressure accuracy and hold performance across the full usable range. Test Date: 2025-05-27 Sample ID:…

Document type

Test Report

Prepared by

Daniel Wright

Published

July 22, 2026

Last reviewed

July 22, 2026

Topics

Motor Performance

Key Findings

The ETENWOLF Vortex S6 heavy-duty cordless inflator (Sample 1) completed 36 road-bicycle inflation sequences spanning 0–110 PSI, with all stop-pressure overshoots and 10-second retention readings confirming the unit’s pressure accuracy and hold performance across the full usable range.

• Test Date: 2025-05-27
• Sample ID: S6-自行车-1# (Bicycle Sample 1)
• Tire Type: Road Bicycle (公路自行车)
• Pressure Range Tested: 0–110 PSI (full range, incremental and segmented sequences)
• Total Data Rows: 36 inflation sequences
• Accuracy Deviation (Δ Accuracy): −1.0 to +1.9 PSI across all sequences
• Pressure Retention Δ (10 s hold): −0.7 to −2.2 PSI across all sequences
• Overall Verdict: All readings within acceptable accuracy tolerance; no anomalies recorded

Test Overview

Test Equipment & Setup

Test Procedure

1. Pre-Test: Confirm tire is deflated to 0 PSI (or the specified starting pressure for segmented sequences). Mount the S6 inflator securely to the valve stem.
2. Preset Entry: Set the target pressure on the S6 unit to the specified preset value (PSI) for each sequence.
3. Inflation: Activate the unit. Allow inflation to proceed autonomously until the unit auto-stops.
4. Stop Pressure Recording: Immediately record the gauge reading at the moment the unit stops — this is the Stop Pressure (PSI).
5. 10-Second Hold: Leave the inflator connected and stationary for 10 seconds after auto-stop, then record the pressure — this is the 10 s Pressure (PSI).
6. Retention Δ Calculation: Compute Retention Δ = 10 s Pressure − Stop Pressure. A negative value indicates pressure bleed-down after auto-stop.
7. Accuracy Δ Calculation: Compute Accuracy Δ = 10 s Pressure − Preset Pressure. This reflects the final delivered pressure relative to the user-set target.
8. Sequence Reset: Deflate or adjust to the next starting pressure and repeat from Step 2 for each subsequent sequence.
9. Post-Test: Record all values in the test log. Flag any sequence where |Accuracy Δ| exceeds the product specification tolerance. Review remarks column for anomalies.

Acceptance Criteria: All 10-second post-stop readings must fall within the declared accuracy tolerance of the S6 unit across the tested range (0–110 PSI). No sustained over-pressure or systematic under-inflation pattern is acceptable.

Test Data & Results

Observations: The stop pressure consistently overshoots the preset by approximately 0.3–2.2 PSI due to line pressure bleed-through at auto-stop. After the 10-second settle period, all readings return to within ±2.2 PSI of the preset. Low-preset sequences (15–35 PSI) show a positive accuracy delta (slight over-delivery at settle), while high-preset sequences (85–110 PSI) show a small negative accuracy delta (marginally under preset at settle). The largest single retention drop is −2.20 PSI (rows 22 and 33), both at a 110 PSI target, which is consistent with higher-pressure valve bleed behavior. No sequence produced a remarks flag.

Conclusion

Document Information

Frequently Asked Questions

How accurate is the ETENWOLF S6 inflator when inflating road bicycle tires?

Across 38 test sequences covering 0–110 PSI, the S6’s 10-second post-stop pressure deviated from the preset target by between −1.00 and +1.90 PSI. Low-pressure targets (15–35 PSI) tended to settle slightly above the preset, while high-pressure targets (85–110 PSI) settled marginally below. All deviations fell within the unit’s declared accuracy tolerance.

Why does the S6 stop at a pressure higher than the preset?

When the S6 auto-stops, there is residual line pressure between the pump head and the valve. This causes the initial stop reading to overshoot the preset by roughly 0.3–2.2 PSI. Within 10 seconds, that pressure bleeds back through the system and the tire gauge settles to a value much closer to the user-set target. This is normal behavior for all cordless inflators and is accounted for in the S6’s auto-stop algorithm.

Is the S6 suitable for high-pressure road bicycle tires up to 110 PSI?

Yes. The test data confirms the S6 successfully inflated road bicycle tires to preset values from 15 PSI through 110 PSI across all tested sequences. Even at the maximum tested pressure of 110 PSI, the 10-second settled reading remained within 2.2 PSI of the target, and no anomalies or failures were recorded.

What is the difference between Retention Δ and Accuracy Δ in this test report?

Retention Δ measures how much pressure is lost in the 10 seconds between the auto-stop moment and the settled reading — essentially a valve and line bleed-down figure. Accuracy Δ measures the difference between that final 10-second settled reading and the preset target the user selected. Retention Δ tells you about short-term pressure stability; Accuracy Δ tells you how close the delivered pressure is to what you asked for.

Related Products

This report covers Sheet S6-自行车-1# (Bicycle Sample 1, Road Bike accuracy test). The same Excel workbook contains five additional test sheets for the ETENWOLF Vortex S6:

• S6-1# — General Accuracy Test, Sample 1
• S6-2# — General Accuracy Test, Sample 2
• S6-3# — General Accuracy Test, Sample 3
• S6-自行车-2# — Bicycle Accuracy Test, Sample 2
• S6-自行车-3# — Bicycle Accuracy Test, Sample 3

View the full product page for the ETENWOLF Vortex S6 Heavy-Duty Cordless Inflator on the ETENWOLF Group store.