Joined: Jan 2009
Posts: 44,306
Likes: 6,567
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
I've been tempted to try latex tubes, but the stories I read convinced me otherwise. And I am not anywhere near being ready to try tubeless, either.
[MENTION=459436]Slightspeed[/MENTION], your impression matches that of others with the GP5000 tire. Some say it's faster than the GP4000. I have the GP4000S-II tire, and it's comfy and very fast. Some say the 5000 is more puncture prone which is easy to believe. I have had only one puncture with my 4000 tires. My bias in general is in favor of tires made by Panaracer which includes the René Herse tires, but I'm pretty impressed with these Continental tires.
I realize some tubes are better than others, but I really don't care. I just buy cheap tubes.