Use Bontrager's Presta Valve Extenders with a deep section wheel and you'll always be able to keep things properly pumped. They must be used with a removable valve core tube.
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953 Ritchie Hwy, Arnold, MD 21012
Phone: (410) 544-3532
Store Hours: Mon-Fri 10-7, Sat 10-6 & Sun 11-5