CYCPLUS AS2 Ultra vs 42mm Gravel Tire — How Many Inflations on One Charge?

Can the CYCPLUS AS2 Ultra mini electric pump handle a 700x42 gravel tire — and how many times will it inflate on a single charge? I ran three back-to-back tests to find out. This is the follow-up gravel tire test to my original CYCPLUS AS2 Ultra review. I tested the pump on a 700x42 tire to 50 PSI, verified pressure accuracy with an external gauge, and kept going until the battery gave out. Here's what happened. Test Results — What I Found: 🟢 Inflation #1: 0 → 50 PSI in 1 min 34 sec 🟢 Inflation #2: 0 → 50 PSI in 1 min 41 sec 🟡 Inflation #3: 0 → 32 PSI before battery depleted (E10 error) ✅ External gauge confirmed accuracy at exactly 50 PSI Bottom line: two full gravel tire inflations on one charge, with enough juice for a partial third that'll still get you home. That's better than carrying multiple CO2 cartridges. What's covered: Setting target pressure on the CYCPLUS AS2 Ultra Presta valve inflation on a 700x42 gravel tire Stopwatch-timed inflation tests (real numbers, not estimates) Pressure accuracy verification vs. an analog gauge Understanding the E10 battery error CYCPLUS AS2 Ultra vs. CO2 cartridges for gravel riding ⏱️ Chapters: 0:00 — Intro & test setup 0:30 — First inflation: 0 → 50 PSI (timed) 1:05 — Pressure accuracy check 1:47 — Second inflation: 0 → 50 PSI (timed) 2:30 — Third inflation: how far does it go? 2:38 — E10 battery error explained 3:00 — Final verdict vs. CO2 cartridges Here is the review video:    • The Smallest Rechargeable Bike Pump? — CYC...   Check out the CYCPLUS AS2 Ultra: https://www.cycplus.com/products/as2u... (Affiliate Link) **USE COUPON CODE "DAVESCYCLING" to save 5% Check out all CYCPLUS Products here: https://www.cycplus.com/?ref=ovqpcsvf (Affiliate Link) **USE COUPON CODE "DAVESCYCLING" to save 5% Products also available on Amazon: https://lasso.to/amazon/OigrsjQz5o/Jf... See more videos:    / @davescycling   All Content Created and Owned by REYNOM MEDIA, LLC