I use these tubes exclusively on all my road bikes and on the bikes I maintain for my friends. The smooth (not threaded) stem doesn't tear up your shop pump head. The stems have replaceable cores. While not super light, they are tough and the price is excellent. I use and carry extra long stemmed tubes because so many of my friend have aero-rims. I log about 5k a year in my bikes. One fixed gear, one Ti Merlin, one steel Viner in service at this time.
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