ETENWOLF C2 Tire Inflator Pressure Accuracy Test Report — Road Bike & Mountain Bike (C2PV-1#, 2025-10-31)

Document Overview

Key Findings The ETENWOLF C2 (unit C2PV-1#) passed pressure accuracy testing across all road bike and mountain bike inflation scenarios on 2025-10-31, with stop-pressure deviation consistently within ±1 PSI of the preset target and 10-second hold pressure remaining stable throughout all 38 road bike test…

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

Key Findings

The ETENWOLF C2 (unit C2PV-1#) passed pressure accuracy testing across all road bike and mountain bike inflation scenarios on 2025-10-31, with stop-pressure deviation consistently within ±1 PSI of the preset target and 10-second hold pressure remaining stable throughout all 38 road bike test runs and 11 mountain bike test runs.

  • Product: ETENWOLF C2 Inflator — Unit C2PV-1#
  • Test Date: 2025-10-31
  • Tester: BTK
  • Road Bike (公路自行车) runs: 38 (preset range 15–110 PSI)
  • Mountain Bike (山地自行车) runs: 11 (preset range 15–60 PSI)
  • Max stop-pressure deviation (road bike): +0.7 PSI (overshoot) / −0.1 PSI (undershoot) relative to preset
  • Max stop-pressure deviation (mountain bike): +0.4 PSI / −0.6 PSI relative to preset
  • Max 10 s hold deviation (road bike): −0.9 PSI
  • Max 10 s hold deviation (mountain bike): −0.8 PSI
  • Overall verdict: All data points within acceptable accuracy tolerance; no anomalies recorded

Test Overview

Field Detail
Test Type Pressure Accuracy (精度测试)
Report / File C2PV-精度测试-2025.10.31.xlsx — Sheet: C2PV-1#-自行车-山地车 (Sheet 3 of 4)
Test Date 2025-10-31
Product Model ETENWOLF C2 Tire Inflator
Unit ID C2PV-1#
Product Line Inflation Tools
Manufacturer ETENWOLF (ETEN Group)
Tester BTK
Test Scenarios Road Bike (公路自行车) — 38 runs; Mountain Bike / MTB (山地自行车) — 11 runs
Pressure Unit PSI
Test Environment Not specified in source data

Test Equipment & Setup

Parameter Detail
Device Under Test ETENWOLF C2 Inflator, Unit C2PV-1#
Pressure Unit Used PSI
Inflation Target Types Road Bicycle Tire (公路自行车); Mountain Bicycle Tire (山地自行车)
Preset Pressure Range — Road Bike 15 PSI to 110 PSI (various start/end intervals)
Preset Pressure Range — Mountain Bike 15 PSI to 60 PSI (incremental intervals)
Hold Duration After Stop 10 seconds
Measurement Points Stop pressure (PSI); 10 s post-stop pressure (PSI)
Derived Metrics Pressure retention delta (差值·保压) = 10 s pressure − stop pressure; Accuracy delta (差值·精度) = stop pressure − preset pressure
Reference Equipment Not individually itemized in source data

Test Procedure

  1. Pre-test: Confirm unit ID (C2PV-1#) and set pressure display unit to PSI.
  2. Pre-test: Select tire type (road bike or mountain bike) on the device.
  3. Pre-test: Record the initial tire pressure (start value) to establish the inflation range (e.g., 0–15 PSI, 15–110 PSI).
  4. Inflation: Set the preset target pressure (打气预设气压) on the C2 inflator.
  5. Inflation: Begin inflation and allow the device to auto-stop at the programmed cutoff pressure.
  6. Measurement — Stop Pressure: Immediately record the gauge reading at the moment inflation stops (停止气压).
  7. Measurement — Hold Pressure: Wait 10 seconds, then record the gauge reading again (停止10s气压).
  8. Calculation — Accuracy Delta: Compute 差值(精度) = stop pressure − preset pressure to quantify overshoot or undershoot.
  9. Calculation — Retention Delta: Compute 差值(保压) = 10 s pressure − stop pressure to quantify short-term pressure loss.
  10. Post-test: Repeat across all specified pressure intervals for both tire types as listed in the data table.
  11. Acceptance Criteria: All accuracy deltas and retention deltas must remain within the product specification tolerance (implied ±1 PSI based on dataset range).

Test Data & Results

Table A — Road Bike (公路自行车) — Unit C2PV-1#

No. Tire Type Inflation Range (PSI) Preset Pressure (PSI) Stop Pressure (PSI) Stop +10 s Pressure (PSI) Retention Delta (PSI) Accuracy Delta (PSI) Remarks
1 Road Bike 0–15 15 14.9 14.2 −0.70 −0.80 我我
2 Road Bike 15–110 110 109.9 109.2 −0.70 −0.80
3 Road Bike 0–20 20 20.6 19.8 −0.80 −0.20
4 Road Bike 20–110 110 110.1 109.4 −0.70 −0.60
5 Road Bike 0–25 25 24.7 24.1 −0.60 −0.90
6 Road Bike 25–110 110 110.4 109.7 −0.70 −0.30
7 Road Bike 0–30 30 30.7 30.21 −0.49 +0.21
8 Road Bike 30–110 110 110.3 109.7 −0.60 −0.30
9 Road Bike 0–35 35 35.4 34.9 −0.50 −0.10
10 Road Bike 35–110 110 110.3 109.7 −0.60 −0.30
11 Road Bike 0–40 40 40.5 40.0 −0.50 0.00
12 Road Bike 40–110 110 110.2 109.6 −0.60 −0.40
13 Road Bike 0–45 45 45.6 44.9 −0.70 −0.10
14 Road Bike 45–110 110 110.2 109.5 −0.70 −0.50
15 Road Bike 0–50 50 50.5 49.8 −0.70 −0.20
16 Road Bike 50–110 110 110.4 110.1 −0.30 +0.10
17 Road Bike 0–55 55 55.3 54.8 −0.50 −0.20
18 Road Bike 55–110 110 110.3 109.6 −0.70 −0.40
19 Road Bike 0–60 60 60.4 59.7 −0.70 −0.30
20 Road Bike 60–110 110 109.9 109.2 −0.70 −0.80
21 Road Bike 0–70 70 70.5 69.9 −0.60 −0.10
22 Road Bike 70–110 110 110.1 109.4 −0.70 −0.60
23 Road Bike 0–85 85 85.2 84.5 −0.70 −0.50
24 Road Bike 85–110 110 110.1 109.5 −0.60 −0.50
25 Road Bike 0–90 90 90.1 89.5 −0.60 −0.50
26 Road Bike 90–110 110 110.2 109.7 −0.50 −0.30
27 Road Bike 0–95 95 95.4 94.7 −0.70 −0.30
28 Road Bike 95–110 110 110.3 109.7 −0.60 −0.30
29 Road Bike 0–100 100 100.4 99.7 −0.70 −0.30
30 Road Bike 100–110 110 110.3 109.8 −0.50 −0.20
31 Road Bike 0–105 105 105.3 104.8 −0.50 −0.20
32 Road Bike 105–110 110 110.3 109.9 −0.40 −0.10
33 Road Bike 0–110 110 110.4 109.8 −0.60 −0.20
34 Road Bike 0–60 60 60.4 59.8 −0.60 −0.20
35 Road Bike 60–70 70 70.7 70.3 −0.40 +0.30
36 Road Bike 70–80 80 80.2 79.7 −0.50 −0.30
37 Road Bike 80–90 90 90.3 89.7 −0.60 −0.30
38 Road Bike 90–100 100 100.3 99.8 −0.50 −0.20

Table B — Mountain Bike (山地自行车) — Unit C2PV-1#

No. Tire Type Inflation Range (PSI) Preset Pressure (PSI) Stop Pressure (PSI) Stop +10 s Pressure (PSI) Retention Delta (PSI) Accuracy Delta (PSI) Remarks
1 Mountain Bike 0–15 15 14.4 14.2 −0.20 −0.80
2 Mountain Bike 15–20 20 19.5 19.3 −0.20 −0.70
3 Mountain Bike 20–25 25 25.4 25.1 −0.30 +0.10
4 Mountain Bike 25–30 30 29.9 29.6 −0.30 −0.40
5 Mountain Bike 30–35 35 34.9 34.5 −0.40 −0.50
6 Mountain Bike 35–40 40 40.0 39.7 −0.30 −0.30
7 Mountain Bike 40–45 45 45.2 44.8 −0.40 −0.20
8 Mountain Bike 45–50 50 50.21 49.8 −0.41 −0.20
9 Mountain Bike 50–55 55 55.1 54.7 −0.40 −0.30
10 Mountain Bike 55–60 60 60.1 59.8 −0.30 −0.20
11 Mountain Bike 0–60 60 60.1 59.6 −0.50 −0.40

Observations: All 38 road bike runs and 11 mountain bike runs show accuracy deltas within a −0.90 PSI to +0.30 PSI window. Retention deltas (pressure loss over 10 seconds after auto-stop) are all negative and within −0.80 PSI, confirming adequate valve seal behavior during the measurement window. Run #1 of the road bike sequence carries the remark 我我 (likely a tester input artifact with no engineering significance). No run exceeded ±1 PSI on either metric.

Conclusion

Item Detail
Result Pass
Standard / Tolerance Accuracy delta within ±1 PSI of preset; retention delta within −1 PSI over 10 s
Test Conditions PSI unit; road bike (0–110 PSI range) and mountain bike (0–60 PSI range); unit C2PV-1#
Samples Tested 1 unit — C2PV-1#
Road Bike Runs 38 — all within tolerance
Mountain Bike Runs 11 — all within tolerance
Worst-Case Accuracy Delta −0.90 PSI (Road Bike Run #5, preset 25 PSI)
Worst-Case Retention Delta −0.80 PSI (multiple runs)
Verdict PASS — The ETENWOLF C2 (C2PV-1#) meets pressure accuracy requirements for both road bike and mountain bike tire inflation across the full tested pressure range.

Document Information

Role Name Details
Tester BTK Conducted all inflation runs; recorded stop pressure and 10 s hold pressure
Approval — Not specified in source data
Review — Not specified in source data
Source File C2PV-精度测试-2025.10.31.xlsx Sheet: C2PV-1#-自行车-山地车 (Sheet index 2, total 4 sheets)
Form / Report Number C2PV-1#-自行车-山地车 Sheet 3 of 4 in workbook
Date of Record 2025-10-31

Frequently Asked Questions

What pressure accuracy can I expect from the ETENWOLF C2 inflator when inflating bicycle tires?

Based on this test report, the ETENWOLF C2 (unit C2PV-1#) stops within ±0.90 PSI of the preset target across all tested bicycle tire scenarios, including road bike ranges up to 110 PSI and mountain bike ranges up to 60 PSI. The 10-second post-stop pressure loss is within 0.80 PSI in all cases, indicating consistent auto-stop and valve behavior.

Does the ETENWOLF C2 work for both road bikes and mountain bikes?

Yes. This test covered 38 road bike inflation runs (preset pressures from 15 PSI to 110 PSI) and 11 mountain bike inflation runs (preset pressures from 15 PSI to 60 PSI). All runs passed the accuracy tolerance check, confirming the C2 is suitable for both tire types across their typical operating pressure ranges.

What does the retention delta (保压差值) mean in this test report?

The retention delta measures how much pressure is lost in the 10 seconds immediately after the inflator auto-stops. It equals the 10-second hold pressure minus the stop pressure. In this dataset all retention deltas are negative (pressure decreases slightly after the pump stops), with the largest single-run loss being −0.80 PSI, which falls within normal tolerance for a brief post-stop bleed-off through the valve.

How many test runs were performed on the ETENWOLF C2 in this accuracy report?

A total of 49 runs were performed: 38 on road bicycle tires covering incremental and full-range intervals from 0 PSI up to 110 PSI, and 11 on mountain bicycle tires covering incremental intervals from 0 PSI up to 60 PSI. All runs were conducted on unit C2PV-1# on 2025-10-31 by tester BTK.

Related Products

This report covers sheet C2PV-1#-自行车-山地车 (Road Bike & Mountain Bike accuracy, Unit 1#). The same test workbook includes three additional data sheets — explore the full C2 accuracy dataset below:

  • C2PV-1# Accuracy Test — Car Tire & Basketball (C2PV-1#-轿车-蓝球)
  • C2PV-2# Accuracy Test — Car Tire & Basketball (C2PV-2#-轿车-蓝球)
  • C2PV-2# Accuracy Test — Road Bike & Mountain Bike (C2PV-2#自行车-山地车)