diff --git a/Customizations/Questions/bike/PumpValves.ts b/Customizations/Questions/bike/PumpValves.ts
index 7825839..e8f63e8 100644
--- a/Customizations/Questions/bike/PumpValves.ts
+++ b/Customizations/Questions/bike/PumpValves.ts
@@ -3,14 +3,15 @@ import Translations from "../../../UI/i18n/Translations";
 import {TagRenderingOptions} from "../../TagRenderingOptions";
 
 
-export default class PumpValves extends TagRenderingOptions{
+export default class 
+PumpValves extends TagRenderingOptions{
     constructor() {
         const to = Translations.t.cyclofix.station.valves
         super({
             question: to.question,
             mappings: [
                 {
-                    k: new Tag("valves", " sclaverand;schrader;dunlop"),
+                    k: new Tag("valves", "sclaverand;schrader;dunlop"),
                     txt: to.default
                 },
                 {k: new Tag("valves", "dunlop"), txt: to.dunlop},
diff --git a/Logic/Osm/Changes.ts b/Logic/Osm/Changes.ts
index edb6b79..85831d6 100644
--- a/Logic/Osm/Changes.ts
+++ b/Logic/Osm/Changes.ts
@@ -63,6 +63,13 @@ export class Changes {
             console.log("Invalid value for ",key);
             return;
         }
+        
+        if(key.startsWith(" ") || value.startsWith(" ") || value.endsWith(" ") || key.endsWith(" ")){
+            console.warn("Tag starts with or ends with a space - trimming anyway")
+        }
+        
+        key = key.trim();
+        value = value.trim();
 
         const eventSource = State.state.allElements.getElement(elementId);