You will need to remove the small amount of air from the small section of tubing between the pinch and the new Schrader valve before you re-round the pinched tubing. You can either push the air out ...

Schrader and Dunlop both pre-date Presta, with Schrader finding prevalence in cruiser bicycles along with cars and even aircraft. Dunlop is still found on bicycles in parts of Asia and Europe.

In this article, we’re going to describe Schrader valves and Presta valves, explain the similarities and differences between each, and teach you how to spot the difference.

The Bike Guy column: Presta has nothing on the Schrader valve It's not quite the wheel, but the invention by the Schraders has lasting beauty and utility.