works fine
Love them
This tube is so light and compact that it is perfect for an emergency tube in my tool bag. I currently use tubeless tires, but in the event of a flat which requires a tube, this one is perfect. It will store in a significantly smaller space than any other tube I've found thus far. If your are into light weight components, then this is the tube to get.
Very durable tube that I used to ride across the United States without a flat. I used these tubes with the Contential 4 Seasons Gran Prix tires.
I use this tube because it is light and the stem is strong. Other than that, tubes make little diference. It is a tried and true tube, be sure to get the stem length that is best for you wheel type. I ride over 6000 miles a year
Used with 25mm tires
I thought I would try out Tufo sealant which requires removable valves. I also didn't want to add rotating weight so the light weight with sealant worked out to be the same as a normal tube. I had punctures that did seal and some that did not. Interesting the smallest puncture did work. I have clincher wheels and I think that this combination doesn't work as well as the tublar setup. The sealant flowed out with the very small puncture into the tire but probably because of there being no air stayed liquid.
The biggest issue is that I have short stems because Direct was out of longer ones.
They are light relatively thin, that makes installation easier in tight high-performance tires. They will flat, but they take a patch well. Some tubes seem to shed patches, not these. Best tubes for daily use if you want a light, responsive feel. They are not perfect, the price is steep. However, I've found that they outlast the cheap tubes by months.
Continental Race Light Road Tubes have a consistent thickness and shape when inflated. The valve cores are installed properly so there won't be any surprise air leaks on your first ride. The full threaded stem accepts a locking nut if you want to run low tire pressures for cyclocross events.
These are durable, light enough, and good quality tubes. I lost faith in the Q tubes and never went back.
Perfect tubes.
I use these in the 650c size and had always used the Conti Race standard tubes.
Have about 1K miles on these so far on a bacchetta recumbent and no flats. The only flat I have ever had with a Conti was a standard race with a few thousand miles on it as i was topping it off in the garage before a ride.
I found the tube to be very lightweight and perfect for racing. I have used them for some time and found them very reliable.
