Pumps up tires/tubes with Shrader valves OK.
The Presta valve side of the twin head does not work properly with short stemmed Presta valves. It seems that the pump nozzle has difficulty in forming a good seal with short stemmed Presta valves. The pump will only pump up to around 75 PSI into the tire/tube. Pressures beyond 75 PSI appear to "seal" the valve, which prevents further tire/tube inflation. The extra pressure just pressurizes the pump hose only!
Pumping to higher pressures is a bit difficult. Especially when compared to easier working pumps such as Specialized and Blackburn brands which I have also.
Overall it is an average pump.
Not recommended for use with short stemmed Presta valves.
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Product Description:
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