The Presta valve has an interior entire body, a valve cap, and an outer stem. It also contains a lock nut which employs to protected the stem to your wheel rim. The air pumping process of this valve is a little bit complicated a result of the compact valve diameter. https://wisesocialsmedia.com/story5178783/how-much-you-need-to-expect-you-ll-pay-for-a-good-presta-addons