Review on 🚴 SUNLITE Presta Valve Tubes - Standard Size by Chris Quinto

These tubes were attractively priced, looked well made and worked perfectly. until both failed because the valve stems broke off the surrounding tubing at the base while riding on a moderately bumpy gravel road. The fact that both broke up within a short period of time makes it more likely that there was a common cause. Over-inflation or over-tightening of the nut at the base of the valve stem can be ruled out: pressure was carefully controlled and only one hose was installed with one nut (which was only hand-tight). Another possibility is that a solvent (such as a lubricant) softened the glue used in the base of each wand; However, no such solvent was deliberately used and the chances of accidentally exposing it to both wheels are slim. So I suspect the glue used in the manufacture was of poor quality, became brittle and failed. That's why I'm giving these lamps two stars, which means they were worth little. However, I wouldn't buy them again.