It hasn't gone flat yet, but the valves leak on these tubes, so tighten the valve religiously.
Very reliable tubes, have been using Conti tubes for years
Better quality than some others.
It's a tube, it's not going to change your life. For what it's worth, these are nice tubes, dependable, not prone to flat, the valves have held up and don't leak.
I bought these tubes because I didnt want to risk popping latex tubes during descending. Iv our about 1000 miles on them and they have held up well, no Airloss or punctures.
Good deal for normal price and great deal when on sale. Reliable product with high quality valve stems.
Nice threaded stem. Very lite tube, and seems to be very strong.
Heavy duty tube...a little heavier than most, but good when touring in varied conditions.
Nice durable tube but lighter weight then any standard tube fits great on rim with tire ??
I prefer to use these tubes with the Continental tires that I run, mostly Gatorskins. Long life despite some tough road conditions.
Put in a new tube for a 100 mile ride. It kept the air and didn't go flat. Worked as it was supposed to!
Nice tubes!
Switched from other brand due to excessive flats. No problem with Conti so far. Well made and priced accordingly.
A high quality tube. Recommended both for racing and touring.
Have used several of these tubes both on dirty city streets and thorny desert roads with Conti 4000S tires with very few flats. Good air retention, durable stems, and great price. For training and commuting, they are tough to beat.
Shopped around a little and found this to be a great price and delivery was really quick
Consistently dependable tubes.
Used in 25 mm tyres without any trouble.
I have to replace my tubes about every other month about 1200 miles these I have had the tubes in for 2200 miles
Very happy quick and prompt
