diff --git a/bi/widget.js b/bi/widget.js
index c6a374bdb..827e92566 100644
--- a/bi/widget.js
+++ b/bi/widget.js
@@ -5800,7 +5800,7 @@ BI.IntervalSlider = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -6261,7 +6261,7 @@ BI.IntervalSliderLabel = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -17458,7 +17458,7 @@ BI.SingleSlider = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -17759,7 +17759,7 @@ BI.SingleSliderLabel = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -18024,7 +18024,7 @@ BI.SingleSliderNormal = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
diff --git a/dist/bundle.js b/dist/bundle.js
index 11a078a20..0e32da68e 100644
--- a/dist/bundle.js
+++ b/dist/bundle.js
@@ -80815,7 +80815,7 @@ BI.IntervalSlider = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -81276,7 +81276,7 @@ BI.IntervalSliderLabel = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -92473,7 +92473,7 @@ BI.SingleSlider = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -92774,7 +92774,7 @@ BI.SingleSliderLabel = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -93039,7 +93039,7 @@ BI.SingleSliderNormal = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
diff --git a/dist/widget.js b/dist/widget.js
index c6a374bdb..827e92566 100644
--- a/dist/widget.js
+++ b/dist/widget.js
@@ -5800,7 +5800,7 @@ BI.IntervalSlider = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -6261,7 +6261,7 @@ BI.IntervalSliderLabel = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -17458,7 +17458,7 @@ BI.SingleSlider = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -17759,7 +17759,7 @@ BI.SingleSliderLabel = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
@@ -18024,7 +18024,7 @@ BI.SingleSliderNormal = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
diff --git a/src/widget/intervalslider/intervalslider.js b/src/widget/intervalslider/intervalslider.js
index 22a86df3c..20a68beb7 100644
--- a/src/widget/intervalslider/intervalslider.js
+++ b/src/widget/intervalslider/intervalslider.js
@@ -194,7 +194,7 @@ BI.IntervalSlider = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
diff --git a/src/widget/intervalslider/intervalslider.label.js b/src/widget/intervalslider/intervalslider.label.js
index 3b14acd59..0737729a5 100644
--- a/src/widget/intervalslider/intervalslider.label.js
+++ b/src/widget/intervalslider/intervalslider.label.js
@@ -157,7 +157,7 @@ BI.IntervalSliderLabel = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
diff --git a/src/widget/singleslider/singleslider.js b/src/widget/singleslider/singleslider.js
index 2a1c18e44..80b0c0e00 100644
--- a/src/widget/singleslider/singleslider.js
+++ b/src/widget/singleslider/singleslider.js
@@ -188,7 +188,7 @@ BI.SingleSlider = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
diff --git a/src/widget/singleslider/singleslider.label.js b/src/widget/singleslider/singleslider.label.js
index 26fed84ed..d963cb794 100644
--- a/src/widget/singleslider/singleslider.label.js
+++ b/src/widget/singleslider/singleslider.label.js
@@ -169,7 +169,7 @@ BI.SingleSliderLabel = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },
 
diff --git a/src/widget/singleslider/singleslider.normal.js b/src/widget/singleslider/singleslider.normal.js
index cc7ae0292..26aaced4b 100644
--- a/src/widget/singleslider/singleslider.normal.js
+++ b/src/widget/singleslider/singleslider.normal.js
@@ -134,7 +134,7 @@ BI.SingleSliderNormal = BI.inherit(BI.Widget, {
         });
 
         function optimizeSize(s) {
-            return BI.clamp(s, 0, o.width);
+            return BI.clamp(s, 0, self._getGrayTrackLength());
         }
     },