ETENWOLF EV3 Inflation Pump Road Bicycle Accuracy Test Report — Unit 9# (15–110 PSI, Bicycle Mode)

Document Overview

Key Findings The EV3 inflation pump (Sample 9#) demonstrated consistent pressure accuracy across all road bicycle inflation tests, with stop-pressure deviation values remaining within ±1.0 PSI of the preset target throughout the full 15–110 PSI operating range. Product: EV3 Inflation Pump (EV3-充气泵) Sample ID: 9#…

Document type

Test Report

Prepared by

Daniel Wright

Published

July 22, 2026

Last reviewed

July 22, 2026

Topics

Motor Performance

Key Findings

The EV3 inflation pump (Sample 9#) demonstrated consistent pressure accuracy across all road bicycle inflation tests, with stop-pressure deviation values remaining within ±1.0 PSI of the preset target throughout the full 15–110 PSI operating range.

• Product: EV3 Inflation Pump (EV3-充气泵)
• Sample ID: 9#
• Manufacturer: Bestdake (贝仕达克)
• Test Mode: Bicycle Mode (自行车模式)
• Tire Type: Road Bicycle (公路自行车)
• Pressure Range Tested: 15–110 PSI
• Total Test Runs: 38
• Accuracy Deviation Range: −0.70 PSI to +0.80 PSI
• Pressure Retention (10 s drop): 0.40–1.60 PSI
• Test Date: 2025-04-26

Test Overview

Test Equipment & Setup

Test Procedure

1. Pre-test: Verify sample unit EV3 9# is fully charged and functional. Confirm bicycle mode is selected on the device. Deflate the test tire to the starting pressure indicated for each run.
2. Preset configuration: Set the target pressure on the EV3 pump to the specified preset value (PSI) for each test run.
3. Inflation: Connect the pump to the road bicycle tire valve and initiate inflation from the listed starting pressure up toward the preset target.
4. Auto-stop recording: Record the actual stop pressure (PSI) at the moment the pump auto-stops.
5. 10-second retention check: Wait 10 seconds, then record the residual pressure (PSI) to assess valve/hose retention.
6. Delta calculations: Compute retention delta = stop pressure − pressure after 10 s. Compute accuracy delta = pressure after 10 s − preset target pressure.
7. Post-test: Deflate tire to the next starting pressure and repeat for all 38 runs.
8. Acceptance criteria: Accuracy delta (pressure after 10 s vs. preset) must remain within ±1.0 PSI across all test points.

Test Data & Results

Observations: All 38 test runs recorded accuracy deltas within ±1.0 PSI of the preset target. The largest negative deviation was −0.70 PSI (runs 12 and 28, preset 110 PSI). The largest positive deviation was +0.80 PSI (run 3, preset 20 PSI). Retention drop over 10 seconds ranged from 0.40 PSI (run 31) to 1.60 PSI (runs 19 and 21), which is consistent with normal valve and hose compliance. No anomalies or failure phenomena were recorded across any run.

Conclusion

Document Information

Frequently Asked Questions

What does the accuracy delta represent in this test?

The accuracy delta is the difference between the tire pressure measured 10 seconds after the pump auto-stops and the preset target pressure. It reflects how closely the EV3 delivers the requested inflation level once the hose and valve pressure have stabilized, which is a more realistic indicator of actual tire pressure than the instantaneous stop reading.

Why is the stop pressure always higher than the preset target?

When the pump stops, residual pressure in the hose and valve connection has not yet fully transferred or equalized. This creates a brief overshoot in the reported stop pressure. After 10 seconds the system stabilizes, bringing the measured tire pressure closer to — and typically within ±1.0 PSI of — the preset value.

What is the significance of the 10-second retention delta?

The retention delta (stop pressure minus pressure after 10 s) quantifies how much pressure is lost to hose bleed-back and valve closure dynamics. Values in this dataset ranged from 0.40 to 1.60 PSI, which is within the normal range for a schrader/presta valve setup and does not indicate a leak in the tire itself.

Does this test cover the full operating range of the EV3 for road bicycles?

Yes. The test systematically covers single-stage inflations from 0 PSI and multi-stage top-up runs across the entire 15–110 PSI road bicycle range, plus incremental 10 PSI step tests between 60–100 PSI. This provides comprehensive coverage of real-world use scenarios for road bicycle tires.

Related Products

Explore other EV3 inflation pump test reports from the same test workbook:

• EV3-4# — Inflation Accuracy Test
• EV3-5# — Inflation Accuracy Test
• EV3-6# — Inflation Accuracy Test
• EV3-Mountain Bike-4 — Inflation Accuracy Test
• EV3-Mountain Bike-5 — Inflation Accuracy Test
• EV3-Mountain Bike-6 — Inflation Accuracy Test
• EV3-Road Bicycle-8 — Inflation Accuracy Test