diff --git a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/ruin/RuinString.java b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/ruin/RuinString.java
index 6d0d23b1..9aa7cf0b 100644
--- a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/ruin/RuinString.java
+++ b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/ruin/RuinString.java
@@ -49,9 +49,9 @@ public final class RuinString extends AbstractRuinStrategy {
 
     private int Kmax = 6;
 
-    private int Lmin = 10;
+    private int Lmin = 30;
 
-    private int Lmax = 50;
+    private int Lmax = 60;
 
     /**
      * Constructs RuinRadial.