Prime Day Deal: This Mini Bike Tire Inflator for Cyclists and E-Bike Riders Is 42% Off

Brit+Co Staff on June 18, 2026

If you ride a road bike or an e-bike, a flat is a lot less stressful when the pump fits in your jersey pocket. The ETENWOLF S0 is a tiny, 0.54-pound electric inflator that handles your tires for you, so you can skip wrestling with a manual frame pump on the side of the road. It’s a packable little thing that lives in a saddlebag or commuter bag — and for Prime Day, it’s 42% off.

The deal

For Prime Day — June 23–26, 2026 — the ETENWOLF S0 Mini Bike Tire Inflator is 42% off, down to $34.99 (from $59.99). It’s a Prime Day deal, so a Prime membership is required, and the price ends when the event closes on June 26 (or earlier if it sells out).

What it is

The S0 is a cordless, rechargeable mini air pump that fits in your palm — ETENWOLF lists it at just 0.54 lb with a 2,400 mAh battery, so it’s easy to stash in a saddlebag or backpack. It tops out at a 150 PSI max with 18 L/min of airflow, which covers high-pressure road tires as well as e-bike and commuter tires. It works with both Presta and Schrader valves (the two valve types you’ll find on bikes), and an auto-stop feature lets you dial in a target pressure on the digital display and shuts the pump off when it gets there, so you’re less likely to over-inflate.

How to use it

Charge it over USB before a ride, then keep it in your saddlebag or pack. When you need air, set the valve adapter to match your tire — Presta or Schrader — and thread it on. Use the +/- buttons to set your target PSI on the display, press start, and let the auto-stop shut it off when it hits your number. Because it’s a compact pump, it’s best for topping off and roadside fixes rather than seating a stubborn tubeless tire or inflating a car tire; for everyday road, e-bike, and commuter tires, it’s quick and hands-off.

Who it’s for

It’s made for cyclists, e-bike riders, commuters, and anyone who values compact gear — riders who want a real pump that disappears into a bag rather than a bulky floor pump that stays home. The Presta-and-Schrader support and 150 PSI max mean it handles high-pressure road tires and lower-pressure e-bike and hybrid tires alike. If you’re inflating car tires, big SUV tires, or want a shop-style floor pump for daily home use, a larger inflator will be faster and more comfortable — the S0 is built around being small and portable.

Frequently asked questions

When is the Prime Day deal?
The 42% discount — down to $34.99 — runs during Amazon Prime Day, June 23–26, 2026. A Prime membership is required, and the price ends when the event closes (or earlier if it sells out).
Does it work with both Presta and Schrader valves?
Yes. ETENWOLF says the S0 supports both Presta and Schrader valves, the two valve types found on most bikes, so it works with road, e-bike, hybrid, and commuter tires without a separate adapter.
How high can it inflate, and will I over-inflate my tires?
ETENWOLF rates it for a 150 PSI max with 18 L/min of airflow, which covers high-pressure road tires. You set a target pressure on the digital display and the auto-stop shuts the pump off when it reaches it, so it’s easy to avoid over-inflating.
Where can I buy it?
It’s available at Amazon — use the button above for the current listing and price.