Bought these for use on new wheels, they only loose a few pounds between rides and some of that is filling the air hose to the gauge. No problems with flats yet but that's more a function of the tires. They seem to me a good tube
Been using this tube for years mostly with Vittoria Rubino Pro's with a fairly high PSI (110-120). I get pretty good milage out of these on my road bike, commuter bike, and track bike.
Love these tubes. I don't worry about flat based on the tubes I use, tires should be the line of defense for flats. I love how light they are and hold pressure well. I usually have to top off the pressure every third ride or so. I usually wait until they go on sale.
use them all & always go back to continental. biketiresdirect constantly have a very competitive price + added discounts from previous orders to help lower the cost of the next one. v+++ incentive to 'keep comin' back! '
I use these tubes in my race wheels (Zipp 404 front, 808 rear w/ extender). Only ever had one issue in 2019 IMLP when I ran over a piece of wire in the road that flatted both front and rear leaving a nice sized indication in both tires (thankfully I was at mile 101). I don't think any tube would have survived that. These are dependable tubes that have served me well for many years and races,
I got these this year since I've started racing as well as doing more high climb centuries (9000 - 11,000 ft) to save weight. However, I'm switching back to Tour 700s because I've been having so many pinch flats during training rides. The rural roads around here have plenty of potholes, rocks, debris, etc. and I got stranded 50 miles from home yesterday with two pinch flats (one on my rear tire and then another on my spare).