The CYCPLUS AS2 Ultra Tiny E-Pump is a highly portable and lightweight electric pump that delivers impressive performance for its size, but its small battery and tendency to heat up limit its use to emergency roadside inflation rather than as a floor pump replacement.
Pros
- Extremely lightweight and compact, lighter than typical hand pumps.1234
- Can inflate tires to 60-70 PSI in about 1 minute, with lab test showing 61 seconds to 70 PSI.456
- Set-and-forget pressure selection with automatic stop at desired PSI.54
- USB-C charging, convenient for on-the-go top-ups.1235
- Includes useful accessories like hose and valve adapters for various valves and inflatables.1356
- Reliable over long-term use; one reviewer used it for 12 months without failure.4
- Performance per gram is highest in its category (lab-tested performance factor 12.89 PSI/s/g×1000).6
- Digital gauge with 1 PSI accuracy, consistent readings.456
Cons
- Battery life limited to about three inflations per charge; may not handle multiple high-pressure tires.3546
- Gets hot during operation, especially at high pressure; temperature reached 62°C in lab tests, posing risk to TPU tubes without hose.1356
- Pressure gauge reads about 3 PSI low (set to 70, reads 67).5
- Noisy operation.34
- Requires adapter for Schrader and ClickValve valves, adding extra item to carry.5
- Price is relatively high (around $119/€100/200 AUD) for an emergency pump.436
- In lab testing, it died after 78 test cycles, with performance degrading by 14.7% after 25 cycles, indicating limited lifespan.6
- Slightly slower than larger AS2 Pro model.2
Key Facts
- Weight ranges from 87-92g bare, with silicone sleeve adding ~16-29g (measured 106-117g).2346
- Dimensions approximately 65 x 47 x 28 mm (length x width x depth), with packed volume 80 cm³.26
- Battery capacity is 400 mAh, operating at 7.4V (2.96 Wh), providing about 3 inflations per charge.2346
- Maximum pressure is 120 PSI (8.3 bar), and it can start against up to 119 PSI.346
- Charging time via USB-C is approximately 20-30 minutes.534
- In lab testing, it achieved 70 PSI in 61 seconds in round 1, ranking 7th out of 18 units.6
- Digital gauge accuracy within 1 PSI (at 70 PSI indicated, actual 67 PSI).654
- Included accessories: silicone case, hose, Schrader/Presta adapters, ball needle, USB-C cable, spare rubber seal, waterproof pouch.1356
Sources
- 110 Percent More ComplicatedCycplus AS2 Ultra Review – Portable Electric Bike Pump Tested
- 2Don't Get Dropped CyclingThe Best Mini Electric Pump Just Got BETTER // Cycplus AS2 Ultra
- 3vit:bikesCycplus AS2 Ultra im Test 🔧🚲 Die perfekte Pumpe für die Tour?
- 4veloracycling.comCycplus AS2 Ultra long-term review: 12 months with the 88g e-pump that makes you forget hand pumps existed
- 5Cycling unboxedCycplus AS2 Ultra Tiny Review | Is Smaller Better? 🤨
- 6Zero Friction CyclingElectric Mini Pump Testing
Reviews & Ratings
06:10The reviewer received the CYCPLUS AS2 Ultra Tiny E-Pump and initially had low expectations but was pleasantly surprised by its performance. They tested it on multiple bikes and a wheelbarrow tire, finding it capable of inflating high-volume tires from low pressures while retaining charge. They appreciated its compact size, USB-C charging, and the included adapter for tubed tires, and plan to incorporate it into their riding kit.
08:00The reviewer discusses the CYCPLUS AS2 Ultra Tiny E-Pump, highlighting its smaller and lighter design compared to the AS2 Pro, while maintaining functionality. He notes it is suitable for everyday carry and can inflate tires multiple times on a single charge. The reviewer also mentions that the Ultra is slightly slower than the Pro but still effective.
26:26The reviewer praises the CYCPLUS AS2 Ultra Tiny E-Pump for its compact size and portability, noting it can inflate a mountain bike tire from 0 to 3 bar in one go, though it gets very hot during use. They highlight its suitability as a backup pump for sporty riders and suggest that touring cyclists might prefer a larger model with a bigger battery.
09:57The reviewer tests the CYCPLUS AS2 Ultra Tiny E-Pump, comparing it to larger models in size, weight, and performance. It is slightly smaller and lighter than the standard size, but not significantly. It successfully inflated three tires to 70 PSI before running out, with each fill taking about 1 minute 20 seconds. The pump's pressure accuracy was consistent but read about 3 PSI low. It has a USB-C charging port and a silicon case for protection. The reviewer notes compatibility issues with ClickValve and Schrader valves, requiring an adapter, but it can be used without it with more force. Overall, the reviewer recommends it for those needing extra space, but prefers the larger model for an extra tire inflation.
The CYCPLUS AS2 Ultra Tiny E-Pump ranked #7 out of 18 units tested, delivering exceptional performance for its 89 g weight, achieving 70 PSI in 61 s in round 1 and a performance factor of 12.89 PSI/s/g×1000. However, it died after 78 test cycles, with output declining by 14.7% after 25 cycles and stabilizing at -13% thereafter, ultimately failing to continue. Its compact size and high output make it a top choice for road users needing a lightweight emergency pump, but its lifespan is insufficient for floor pump duties.
AI Summary
Full test data from Zero Friction Cycling
Sign in to see every measured figure, and the pros and cons drawn from them.
Sign inTest data: Zero Friction Cycling · Electric Mini Pump Testing · v9 · July 2026
The reviewer found the CYCPLUS AS2 Ultra Tiny E-Pump to be a reliable and convenient replacement for a traditional hand pump after 12 months of use. It is lightweight, accurate, and quick, making roadside punctures a minor inconvenience. However, it has a limited battery life and is relatively expensive.
CYCLINGUNBOXEDDGDCWhere to Buy
CYCPLUS AS2 Ultra Tiny E-pump for Bike
Specifications
Attributes
Spotted an error in the specs? Help us correct it — sign in or create an account.
Questions about CYCPLUS AS2 Ultra Tiny E-Pump
Sign up and share your experience — help other riders decide!
Create Account & Review