1 of 2 customers found this review helpful.
My main goal when purchasing these tubes was to ride puncture free. So far, after riding 500 miles (on new GP4000S tires), I still have not had any flats. So goal accomplished :-)
The one thing that surprised me a bit was the weight of the tubes - they felt noticeably heavier then the tubes I was using before (not sure about the brand). So if you are trying to shave every single gram off of your bike, you may want to consider a different tube - or drink one less beer the night before the ride, that will do the same thing :-)
Anyway, a good tube, no noise (from the valve stem), no flats so far.
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