The concept of this article is great. Unfortunately, this particular brand is unreliable. the first 6 months. The return period has not yet expired but Revain kindly made an exception to exchange the item for me. The second worked for about 3 months and after that the tire would lose air while the pump was running every time I tried to use it. I tried 1 car tire (thanks to ICARMAINT for having to call roadside assistance because my attempt to inflate an under-inflated tire caused the car to spin out of control) and a bicycle tire. I tried two different mounting tubes (clamp and bolt-on) on a bike tire, so I'm pretty sure the leak isn't in the mounting tubes. It's definitely in the pump. So DO NOT BUY THIS ITEM. I promise I'll stay on the sidelines.