
1) Low German surname
Found on
https://www.crosswordclues.com/clue/schrader

Schrader is a family name very common roughly within the Triangle Hannover-Hamburg-Berlin within Germany (so-called `Eastfalia`, part of today`s states of Lower Saxony and Saxony-Anhalt). Carriers of this name have spread all over the world due to emigration from Germany. It is especially common in the United States, but there are also occurren......
Found on
http://en.wikipedia.org/wiki/Schrader

an inner tube valve identical to those found on car tires. A tiny plunger in the center of its opening must be depressed for air to enter or exit.
Found on
http://www.fcactivetravel.com/news/glossary-road-cycling-terms

an inner tube valve identical to those found on car tires. A tiny plunger in the center of its opening must be depressed for air to enter or exit.
Found on
https://www.encyclo.co.uk/local/22514
No exact match found.