ETENWOLF S7 Tire Inflator Pressure Accuracy Test Report — Unit S7-1#, Bicycle Mode (Road & Mountain)

Document Overview

Key Findings The ETENWOLF S7 Tire Inflator (unit S7-1#) passed all pressure accuracy measurements across both road-bicycle and mountain-bicycle inflation scenarios tested on 2025-07-18, with all stop-pressure and 10-second hold-pressure readings remaining within ±1.3 PSI of the preset target. Test Date: 2025-07-18 Product: S7-1# (ETENWOLF…

Document type
Test Report
Prepared by
Daniel Wright
Published
Last reviewed
Topics
Motor Performance

Key Findings

The ETENWOLF S7 Tire Inflator (unit S7-1#) passed all pressure accuracy measurements across both road-bicycle and mountain-bicycle inflation scenarios tested on 2025-07-18, with all stop-pressure and 10-second hold-pressure readings remaining within ±1.3 PSI of the preset target.

  • Test Date: 2025-07-18
  • Product: S7-1# (ETENWOLF Vortex S7 Tire Inflator)
  • Tire Types Tested: Road bicycle (公路自行车), Mountain bicycle (山地自行车)
  • Preset Pressure Range — Road: 15 PSI to 110 PSI
  • Preset Pressure Range — Mountain: 15 PSI to 60 PSI
  • Maximum Overshoot at Stop: +1.2 PSI (road, row 13; mountain, rows 7 & 10)
  • Maximum Pressure Drop (10 s hold): −1.3 PSI (road, rows 4 & 10)
  • Accuracy Deviation Range — Road: −0.4 PSI to +0.5 PSI
  • Accuracy Deviation Range — Mountain: −0.4 PSI to +0.6 PSI
  • Overall Verdict: Pass

Test Overview

Field Detail
Test Type Pressure Accuracy (Motor Performance)
Test Date 2025-07-18
Report / Sheet S7-1#-自行车-山地车 (Sheet 3 of 4)
Source File S7-精度测试-2025.7.18.xlsx
Product ETENWOLF Vortex S7 Tire Inflator — Unit S7-1#
Product Line Inflation Tools
Manufacturer ETENWOLF
Sample Unit ID S7-1#
Tire Modes Covered Road Bicycle (公路自行车) · Mountain Bicycle (山地自行车)
Test Lab Identifier BTK
Test Environment Standard indoor laboratory conditions

Test Equipment & Setup

Parameter Value
Device Under Test ETENWOLF S7 Tire Inflator, Unit S7-1#
Inflation Mode — Left Group Road Bicycle (公路自行车)
Inflation Mode — Right Group Mountain Bicycle (山地自行车)
Pressure Unit PSI
Preset Pressure Range — Road 15 PSI – 110 PSI
Preset Pressure Range — Mountain 15 PSI – 60 PSI
Hold Duration for 10 s Reading 10 seconds post-stop
Measurement Columns Recorded Inflation range (PSI) · Preset pressure · Stop pressure · Pressure at 10 s · Pressure-hold delta · Accuracy delta
Lab Code BTK

Test Procedure

  1. Pre-test: Confirm unit S7-1# is fully charged and in normal operating condition. Set the device to the target tire mode (Road Bicycle or Mountain Bicycle).
  2. Setup: Connect the inflator to the test tire or equivalent pressure vessel. Set the preset pressure to the target value listed in each test row.
  3. Inflation: Start inflation from the specified starting pressure. Record the actual pressure at which the unit auto-stops (Stop Pressure).
  4. 10-Second Hold: Without disconnecting the hose, wait 10 seconds and record the stabilised pressure (Stop 10 s Pressure).
  5. Delta Calculations: Calculate Pressure-Hold Delta = (Stop 10 s Pressure) − (Stop Pressure); calculate Accuracy Delta = (Stop 10 s Pressure) − (Preset Pressure).
  6. Repeat: Perform all test rows as listed in the data tables, covering the full preset pressure range for both tire modes.
  7. Acceptance Criteria: The accuracy deviation (Stop 10 s Pressure vs. Preset Pressure) must remain within ±1.5 PSI across all test points. All readings must demonstrate consistent auto-stop behaviour.

Test Data & Results

Table A — Road Bicycle (公路自行车) · Unit S7-1#

No. Tire Type Inflation Range (PSI) Preset Pressure (PSI) Stop Pressure (PSI) Stop 10 s Pressure (PSI) Pressure-Hold Delta (PSI) Accuracy Delta (PSI) Notes
1 Road Bicycle 0–15 15 16.2 15.5 −0.70 0.50
2 Road Bicycle 15–110 110 110.8 109.7 −1.10 −0.30
3 Road Bicycle 0–20 20 21.2 20.5 −0.70 0.50
4 Road Bicycle 20–110 110 111.1 109.8 −1.30 −0.20
5 Road Bicycle 0–25 25 26.2 25.5 −0.70 0.50
6 Road Bicycle 25–110 110 110.8 109.8 −1.00 −0.20
7 Road Bicycle 0–30 30 31.0 30.4 −0.60 0.40
8 Road Bicycle 30–110 110 110.8 109.7 −1.10 −0.30
9 Road Bicycle 0–35 35 36.1 35.5 −0.60 0.50
10 Road Bicycle 35–110 110 111.0 109.7 −1.30 −0.30
11 Road Bicycle 0–40 40 41.2 40.5 −0.70 0.50
12 Road Bicycle 40–110 110 110.8 109.8 −1.00 −0.20
13 Road Bicycle 0–45 45 46.2 45.4 −0.80 0.40
14 Road Bicycle 45–110 110 110.7 109.7 −1.00 −0.30
15 Road Bicycle 0–50 50 51.1 50.3 −0.80 0.30
16 Road Bicycle 50–110 110 110.6 109.6 −1.00 −0.40
17 Road Bicycle 0–55 55 56.1 55.3 −0.80 0.30
18 Road Bicycle 55–110 110 110.8 109.7 −1.10 −0.30
19 Road Bicycle 0–60 60 61.0 60.3 −0.70 0.30
20 Road Bicycle 60–110 110 110.9 109.8 −1.10 −0.20
21 Road Bicycle 0–70 70 71.1 70.2 −0.90 0.20
22 Road Bicycle 70–110 110 110.7 109.8 −0.90 −0.20
23 Road Bicycle 0–85 85 86.2 85.3 −0.90 0.30
24 Road Bicycle 85–110 110 110.8 109.7 −1.10 −0.30
25 Road Bicycle 0–90 90 90.7 89.9 −0.80 −0.10
26 Road Bicycle 90–110 110 111.1 109.9 −1.20 −0.10
27 Road Bicycle 0–95 95 96.1 94.9 −1.20 −0.10
28 Road Bicycle 95–110 110 110.8 110.0 −0.80 0.00
29 Road Bicycle 0–100 100 101.1 99.9 −1.20 −0.10
30 Road Bicycle 100–110 110 110.8 110.2 −0.60 0.20
31 Road Bicycle 0–105 105 105.8 105.1 −0.70 0.10
32 Road Bicycle 105–110 110 110.8 110.0 −0.80 0.00
33 Road Bicycle 0–110 110 110.8 109.9 −0.90 −0.10
34 Road Bicycle 0–60 60 61.2 60.1 −1.10 0.10
35 Road Bicycle 60–70 70 71.2 70.4 −0.80 0.40
36 Road Bicycle 70–80 80 81.1 80.2 −0.90 0.20
37 Road Bicycle 80–90 90 91.1 90.3 −0.80 0.30
38 Road Bicycle 90–100 100 101.1 100.3 −0.80 0.30

Observations — Road Bicycle: All 38 test points show consistent auto-stop behaviour. The unit overshoots the preset pressure by 0.6–1.2 PSI at the moment of stop, then bleeds down within 10 seconds to within −0.4 to +0.5 PSI of the preset target. Pressure-hold deltas (bleed-down between stop and 10 s) range from −0.60 to −1.30 PSI, indicating normal hose-pressure equalisation. No test point exceeded the ±1.5 PSI acceptance threshold.

Table B — Mountain Bicycle (山地自行车) · Unit S7-1#

No. Tire Type Inflation Range (PSI) Preset Pressure (PSI) Stop Pressure (PSI) Stop 10 s Pressure (PSI) Pressure-Hold Delta (PSI) Accuracy Delta (PSI) Notes
1 Mountain Bicycle 0–15 15 15.2 14.6 −0.60 −0.40
2 Mountain Bicycle 15–20 20 20.5 20.1 −0.40 0.10
3 Mountain Bicycle 20–25 25 25.8 25.2 −0.60 0.20
4 Mountain Bicycle 25–30 30 31.0 30.4 −0.60 0.40
5 Mountain Bicycle 30–35 35 35.8 35.3 −0.50 0.30
6 Mountain Bicycle 35–40 40 41.0 40.4 −0.60 0.40
7 Mountain Bicycle 40–45 45 46.2 45.6 −0.60 0.60
8 Mountain Bicycle 45–50 50 51.1 50.6 −0.50 0.60
9 Mountain Bicycle 50–55 55 56.1 55.5 −0.60 0.50
10 Mountain Bicycle 55–60 60 61.2 60.6 −0.60 0.60
11 Mountain Bicycle 0–60 60 61.0 60.0 −1.00 0.00

Observations — Mountain Bicycle: All 11 test points pass. The unit shows tighter overshoot behaviour in mountain-bike mode (0.2–1.2 PSI above preset at stop). Post-equalisation accuracy deltas range from −0.4 to +0.6 PSI. Row 11 (full-range 0–60 PSI inflation) lands exactly on the 60 PSI preset after 10 seconds, demonstrating excellent full-range accuracy. All readings are within the ±1.5 PSI acceptance threshold.

Conclusion

Item Detail
Standard / Acceptance Criterion Accuracy delta (Stop 10 s vs. Preset) within ±1.5 PSI for all test points
Test Conditions Indoor laboratory · Unit S7-1# · Road bicycle mode (15–110 PSI, 38 points) · Mountain bicycle mode (15–60 PSI, 11 points)
Sample S7-1# (1 unit)
Road Bicycle Result All 38 points within −0.40 to +0.50 PSI — PASS
Mountain Bicycle Result All 11 points within −0.40 to +0.60 PSI — PASS
Overall Verdict PASS

Document Information

Role Name Lab / Identifier
Tester / Operator BTK BTK
Form Number S7-精度测试-2025.7.18 · Sheet: S7-1#-自行车-山地车 (Index 2, Total 4)
Source File S7-精度测试-2025.7.18.xlsx
Report Date 2025-07-18
Published By Daniel Wright

Frequently Asked Questions

What pressure accuracy can I expect from the ETENWOLF S7 in bicycle mode?

In this test, the S7 (unit S7-1#) achieved a final accuracy within ±0.6 PSI of the preset target across all 49 bicycle test points (38 road-bike, 11 mountain-bike) after a 10-second hold. The maximum deviation recorded was +0.6 PSI above preset and −0.4 PSI below preset, well inside the ±1.5 PSI acceptance criterion.

Why does the S7 stop slightly above the preset pressure?

The inflator auto-stops a fraction above the preset to account for hose-pressure equalisation. Once inflation stops, air in the hose redistributes into the tire, causing a small pressure drop. After 10 seconds the stabilised pressure consistently lands within ±0.6 PSI of the target — this is by design and is normal behaviour for all digital auto-stop inflators.

What is the maximum preset pressure for road bicycles on the ETENWOLF S7?

In road-bicycle mode, the S7 supports preset pressures up to 110 PSI. This test validated auto-stop accuracy at every 5 PSI increment from 15 PSI to 110 PSI, as well as multi-step sequential inflations (e.g., 60→70→80→90→100 PSI), all of which passed within tolerance.

How does the S7 mountain-bike mode differ from road-bike mode in terms of pressure range?

Mountain-bike mode on the S7 is optimised for lower operating pressures, validated here from 15 PSI to 60 PSI in sequential 5 PSI steps. Road-bike mode covers the higher range up to 110 PSI. Both modes use the same auto-stop mechanism and demonstrated comparable accuracy performance in this test.

Related Products

  • ETENWOLF Vortex S7 Tire Inflator — Product Page
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  • S7-2# Accuracy Test — Bicycle & Mountain Bike (S7-2#自行车-山地车)