Angela D.wrote a review of Zipp Tangente Course R28 Tire - Clincher on September 18, 2019
Familiarity: I've put it through the wringer
I swear by the Continental Grand Prix 4000's and since they're discontinued and I couldn't find my 28's in old stock, I trusted the journalist reviews on these Zipp tires, which favorably compare them to the Contis. Well, they ride fine, though the cornering traction is not quite as good as the Contis. The biggest issue is that I've had 1 flat on each tire in the last 2 weeks and they have about 500 miles on them. Each flat was from a tiny thorn, not glass or metal or anything else I expected. Both times the thorns were so deep into the tires that I could barely get them out. The texture is so very soft that they wedged in there. This never happened on my Contis. Also, I don't need tire levers to put these NEW tires on! That usually happens after tires have many miles on them. They're just too soft and supple to withstand anything but the most perfect, clean pavement.
Since it's too late to return them, I'll run them a bit longer, but they're starting to cost me too much in replacement tubes.