The Presta valve has an interior body, a valve cap, and an outer stem. In addition, it has a lock nut which makes use of to safe the stem into the wheel rim. The air pumping technique of this valve is a little bit difficult due to compact valve diameter. https://bookmarkingdepot.com/story19668064/how-much-you-need-to-expect-you-ll-pay-for-a-good-live-chat-support-prestashop