ETENWOLF C2 Tire Inflator Pressure Accuracy Test Report — Road Bike & Mountain Bike (Unit #2)

Document Overview

Key Findings The ETENWOLF C2 inflator (unit C2PV-2#) completed a full pressure accuracy validation across road bike and mountain bike tire profiles on 2025-10-31, with all stop-pressure and 10-second hold-pressure readings remaining within ±1.1 PSI of the preset target across every test point. Unit Under…

Document type

Test Report

Prepared by

Daniel Wright

Published

July 22, 2026

Last reviewed

July 22, 2026

Topics

Motor Performance

Key Findings

The ETENWOLF C2 inflator (unit C2PV-2#) completed a full pressure accuracy validation across road bike and mountain bike tire profiles on 2025-10-31, with all stop-pressure and 10-second hold-pressure readings remaining within ±1.1 PSI of the preset target across every test point.

• Unit Under Test: C2PV-2#
• Test Date: 2025-10-31
• Tester Code: BTK
• Road Bike Range Tested: 15 PSI to 110 PSI (33 individual inflation segments)
• Mountain Bike Range Tested: 15 PSI to 60 PSI (11 individual inflation segments)
• Maximum Accuracy Deviation (Road Bike): −1.1 PSI (Row 3, 0→20 PSI)
• Maximum Accuracy Deviation (Mountain Bike): −0.9 PSI (Row 2, 15→20 PSI)
• Maximum Pressure Retention Drop (Road Bike): −0.9 PSI (Rows 26, 27)
• Maximum Pressure Retention Drop (Mountain Bike): −0.5 PSI (Row 11)
• Overall Verdict: All measurements within acceptable tolerance band

Test Overview

Test Equipment & Setup

Test Procedure

1. Pre-test: Confirm unit C2PV-2# is fully charged and at ambient temperature. Record unit serial / batch code.
2. Tire selection: Mount the appropriate valve adapter for road bike (公路自行车) or mountain bike (山地自行车) tire.
3. Preset target: Set the desired stop pressure on the inflator display to the value listed in the "Preset Pressure" column.
4. Inflation: Begin inflation from the starting pressure indicated in the "Inflation Range" column. Allow the unit to run until it auto-stops.
5. Stop-pressure recording: Immediately read and record the pressure shown on the gauge at auto-stop ("Stop Pressure" column).
6. 10-second hold: Keep the inflator connected to the valve for 10 seconds without further inflation, then read and record the pressure ("Stop+10 s Pressure" column).
7. Delta calculations: Calculate Retention Delta = (Stop+10 s Pressure) − (Stop Pressure); calculate Accuracy Delta = (Stop+10 s Pressure) − (Preset Pressure).
8. Repeat: Deflate or move to the next starting pressure as specified; repeat steps 3–7 for every row in the test matrix.
9. Post-test: Inspect unit for any abnormalities; archive raw data to Excel file.
10. Acceptance Criteria: All accuracy delta values must fall within ±1.5 PSI of the preset target pressure.

Test Data & Results

Table A — Road Bike (公路自行车) | Unit C2PV-2#

Table B — Mountain Bike (山地自行车) | Unit C2PV-2#

Observations: All 38 road bike readings and all 11 mountain bike readings fell within the ±1.5 PSI acceptance band. The worst-case accuracy delta of −1.1 PSI occurred on road bike rows 2 and 3 (low-range 15–20 PSI segment), which is consistent with expected valve-seating behaviour at low pressures. Retention deltas (pressure drop over 10 seconds while the inflator remains connected) stayed within −0.9 PSI across both profiles, indicating normal valve-bleed behaviour. No anomalous readings or equipment faults were recorded during the test session.

Conclusion

Document Information

Frequently Asked Questions

What pressure accuracy can I expect from the ETENWOLF C2 tire inflator?

In controlled testing of unit C2PV-2#, the C2 inflator delivered accuracy deltas (difference between the 10-second hold pressure and the preset target) ranging from −1.1 PSI to +0.2 PSI across road bike tire segments (15–110 PSI) and from −0.9 PSI to −0.1 PSI across mountain bike segments (15–60 PSI). Every reading passed the ±1.5 PSI acceptance threshold.

Does the ETENWOLF C2 hold pressure accurately after it auto-stops?

Yes. With the inflator nozzle still connected, pressure retention was measured over a 10-second dwell period. The maximum retention drop recorded was −0.9 PSI on road bike segments and −0.5 PSI on mountain bike segments. This bleed-down is normal valve-seating behaviour and does not affect the inflated tire once the nozzle is removed.

Is the ETENWOLF C2 suitable for both road bikes and mountain bikes?

The C2PV-2# unit was validated across the full road bike range (15–110 PSI) in 33 test segments and across the mountain bike range (15–60 PSI) in 11 segments. All readings passed, confirming the unit is suitable for both tire types within its rated pressure range.

How does the C2PV-2# unit compare to the C2PV-1# unit?

Both units were tested in the same test campaign (file C2PV-精度测试-2025.10.31.xlsx). The C2PV-1# results are documented in the sibling sheets for road bike and mountain bike profiles. Cross-referencing those reports will show unit-to-unit consistency across the C2 production batch.

Related Products

• C2PV-1# — Car Tire & Basketball Pressure Accuracy Test Report
• C2PV-1# — Road Bike & Mountain Bike Pressure Accuracy Test Report
• C2PV-2# — Car Tire & Basketball Pressure Accuracy Test Report