I have a 10 lb bottle and with airing up my 35's and bills 33's from about 15psi to 35psi, I wanna say that my bottle lasted about 6 wheeling trips, maybe 8. I don't remember exactly how many trips but I filled up 8 tires each time for the most part. We wheeled every weekend almost and the bottle lasted maybe a month and a half to two months. The way I see it, filling a co2 bottle every other month is a easy sacrifice for QUICK and easy air.