The CYCPLUS AS2 Tiny E-Pump (Cube) is a genuinely pocket-sized electronic pump that replaces CO2 cartridges for road-side emergencies, praised for its light weight and convenience but criticised for slow inflation, limited battery life, and heat-related risks to TPU tubes. Independent lab testing ranks it near the bottom of its class due to severe performance degradation and early failure, while most reviewers still consider it a handy backup for road and gravel rides.
Pros
- Lightweight (97–114 g) and compact, fitting easily in a jersey pocket or saddle bag.123
- Can inflate a road bike tire to 80 PSI in under a minute.23
- USB-C rechargeable, eliminating the need to buy and carry CO2 canisters; can be charged from a phone.34
- Includes a silicone cover to protect hands from heat and a spare nozzle insert.54
- Feels safer and is more environmentally friendly than disposable CO2 cartridges.23
- Simple operation with a power button and battery level indicator.53
- Pro version adds a screen for setting and reading pressure, enhancing control.2
- Won an award at Eurobike 2023 and was a runner-up for Best Innovation of 2023.56
Cons
- Slow inflation: 85 s to 70 PSI in the lab; takes 1 min 20 s to inflate a 29x2.4" MTB tire to only 7 PSI.45
- Limited battery life: only 2.21 rounds per charge (lab); may only inflate one mountain bike tire to under 20 PSI on a full charge.45
- Gets hot during use (up to 65 °C in lab), and TPU inner tube stems can reach 180 °F, risking valve damage; an extension tube is advised.24
- No hose attachment, making it risky for TPU tubes and tubeless repairs; direct press-on can overheat valves.4
- Severe performance degradation: 34.9% drop after 100 cycles and died at 100 cycles from seal wear.4
- Requires charging via USB, unlike a mini pump that works repeatedly without charging.3
- More expensive than CO2 in the long run; would need about 30–35 punctures before it becomes cheaper.3
- Poor value: cost per performance point was 6.67 AUD, higher than many competitors.4
Key Facts
- Weight: 97 g (lab-measured), 114 g (reviewer-measured); dimensions 4.35x6.52x2.81 cm; packed volume 79.7 cm³.423
- Maximum pressure: 105 PSI (lab), 100 PSI (reviewer); can inflate a 25c road tire to 60 PSI twice per charge.43
- Inflation speed: 85 s to 70 PSI in a 1.2 L tank (lab); road tire to 80 PSI in under a minute (reviewer).42
- Battery: 2.8 Wh, USB-C rechargeable; 2.21 rounds per charge (28c equivalent) or 15.5 g air per charge (lab); about four 28c tires per charge (reviewer).42
- Heat: unit reached 38 °C after round 1 and 65 °C after round 2, failing round 3 (lab); TPU inner tube stems can reach 180 °F (82 °C) after pumping, so an extension tube is recommended.42
- Durability: 34.9% performance drop after 100 cycles and died at 100 cycles from seal wear (lab).4
- Noise: 89 dB at 30 cm (lab).4
- Price: 109.95 AUD (lab); cheaper directly from the website than Amazon at the time of one review.43
Sources
- 1BikeLabHQ5 Incredible Cycling Upgrades from Amazon (for only $10-$120!)
- 2Local Alien / CLIFFI try all 3 CYCPLUS Tiny e-Pumps. 2024 New Cycplus Bicycle Tire Mini Electric Air Pumps. AS2 Pro Max
- 3The Cycle WorkshopIs this the END for C02 and the Mini Pump? - CycPlus Tiny Pump Cube
- 4Zero Friction CyclingElectric Mini Pump Testing
- 5LoveMTBEasy Bike FLAT Repairs! The CYCPLUS AS2, AS2 Pro, AS2 Pro MAX Tiny e-Pump [Compressor]
- 6China CyclingYear in Review: 2023 Panda Podium Awards (CRW, Magene, Cybrei, OVERFAST, etc...)
Reviews & Ratings
12:02The reviewer tests the CYCPLUS AS2 Tiny E-Pump (Cube) and concludes it is brilliant, performing exactly as claimed. He finds it can inflate a 25c road tire to 60 PSI twice, a 35c gravel tire to 50 PSI twice, and an old clincher tire to over 100 PSI (107 PSI initially, then 105 PSI). He states it will go on every bike ride and considers it better than CO2 and mini pumps, though he notes it is more expensive than CO2 in the long run and requires charging.
05:31The reviewer discusses the CYCPLUS AS2 Tiny E-Pump (Cube), noting its compact size and light weight. They mention that it can inflate a road bike tire in about a minute and has been used for about a year. The reviewer highlights the new AS2 Pro version with a screen for setting pressure, and the larger Pro Max model. They test the pumps on various tires and comment on battery life and temperature concerns.
10:29The reviewer discusses the CYCPLUS AS2 Tiny E-Pump (Cube) as part of a comparison of portable pumps. They note that it is the original pump that won an award at Eurobike in 2023. They test it on a 29x2.4 inch mountain bike tire and find that it takes 1 minute and 20 seconds to inflate to 7 PSI, and the battery indicator shows about half, suggesting it would need a full battery to inflate one tire to under 20 PSI. They describe it as a cartridge replacement, not really for mountain biking, but suitable for road rides where it can fit in a back pocket.
14:10The reviewer briefly mentions the CYCPLUS Cube Mini Bike Pump but does not provide detailed analysis.
21:22The CYCPLUS Cube Mini Bike Pump is mentioned as a runner-up in the 'Best Innovation of 2023' award category. The reviewer highlights that while electronic pumps have been seen before, the CYCPLUS Mini Pump stands out for being the first of its kind to be this small and handy. They mention using it on most of their rides and consider it a good product.
The CYCPLUS AS2 Tiny E-Pump (Cube) ranked 16th out of 18 units tested, with a performance score of 16.49 out of 76. It survived 100 test cycles before dying from seal wear, showing a 34.9% performance drop by cycle 100. Its slow inflation (85 s to 70 PSI) and lack of hose make it risky for TPU tubes and tubeless repairs, and the tester recommends against it.
AI Summary
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Sign inTest data: Zero Friction Cycling · Electric Mini Pump Testing · v9 · July 2026
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CYCPLUS Cube Mini Bike Pump
CYCPLUS AS2 Tiny E-Pump For Bike
CYCPLUS AS2 Tiny E-Pump For Bike
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