These tubes combined with Conti GP4000 or Gatorskin tires make for a very reliable, flat-free system. Don't lower your tire inflation pressures! Use the recommended maximum on the tire and you won't get flats, especially pinches. There is no low-pressure movement! You also don't have to fill your tires as often. These tubes hold air well enough to go several days - but no further. Check them with a gauge so you catch slow leaks.
The 25-32 size is really handy because it covers the sizes most commonly used on road and gravel. The 60mm length is perfect for the slightly aero rims I have, no need to mess with extenders and moving valve cores.
The Continental Race Road Tubes do what they're supposed to - hold air. However, I wish that the length of the Presta valves were longer (48mm or so) for better rim clearance.
Ive been running continental tires for years and love them. Just got a new bike that requires valve stem extensions. To use extensions, the core needs to be removed. These tubes have removable valve cores. Now I need to fall in love with these tubes.
This used to be my go to tube, NOT anymore. The last 3 tubes have all burst at the seams, litterally. All after being ridden for only a few days. Not sure if I got a bad batch but not worth trying these again.