A Nano is like carrying a couple of CO2 cartridges in your pocket for Justin: 'just-in case'. But with more capacity than two CO2 cartridges and fully reusable because it's rechargeable. 

A Nano will inflate road or gravel tyres from fully flat to rideable in 50 seconds. That will give you around 65 psi in a 700 x 25c tyre or 20 psi in a chunky 29" x 2.2" MTB tyre. Plenty of air in there to keep you riding rather than limping home, and fast enough that you can catch back up to the bunch. So small and light you barely notice it's there in your jersey pocket. Until you need it, then you love it because it pumps up a tire with no sweating or swearing. And it's USB-C fast-rechargeable so you just need to remember to plug and it's ready for the next ride.

Nanos and Minis don't need gauges, displays and pressure sensors, they're intentionally minimalist. If you have a flat tyre that needs inflating, pop it on the valve and press the 'go' button. It will stop automatically to avoid overheating and allow you to 'thumb check' where your tyre pressure is. Just press 'go' again to add more air. 

Hand-made in Australia and with user-replaceable batteries, a Nano is an investment in quality riding kit which will last for years and years. You may never need to use it, but when you do it just gets the job done without pfaff or mess. 

Road (700 x 25c):  0 - 67 psi in 50 seconds or 0 - 99 psi in 100 seconds

Gravel (700 x 32):  0 - 38 psi in 50 seconds or 0 - 75 psi in 100 seconds 

Mtb (29" x 2.2"):   0 - 20psi in 50 seconds 

Maximum pressure 120 psi