diff --git a/core/language/en-GB/ThemeTweaks.multids b/core/language/en-GB/ThemeTweaks.multids
index 5168053c3..3c018af5f 100644
--- a/core/language/en-GB/ThemeTweaks.multids
+++ b/core/language/en-GB/ThemeTweaks.multids
@@ -28,6 +28,8 @@ Metrics/BodyFontSize: Font size for tiddler body
 Metrics/BodyLineHeight: Line height for tiddler body
 Metrics/StoryLeft: Story left position
 Metrics/StoryLeft/Hint: how far the left margin of the story river<br>(tiddler area) is from the left of the page
+Metrics/StoryMinWidth: Story minimum width
+Metrics/StoryMinWidth/Hint: the minimum width of the story river
 Metrics/StoryTop: Story top position
 Metrics/StoryTop/Hint: how far the top margin of the story river<br>is from the top of the page
 Metrics/StoryRight: Story right
diff --git a/themes/tiddlywiki/vanilla/ThemeTweaks.tid b/themes/tiddlywiki/vanilla/ThemeTweaks.tid
index 0e8babf7a..b7f36778b 100644
--- a/themes/tiddlywiki/vanilla/ThemeTweaks.tid
+++ b/themes/tiddlywiki/vanilla/ThemeTweaks.tid
@@ -72,6 +72,7 @@ caption: {{$:/language/ThemeTweaks/ThemeTweaks}}
 |<$link to="$:/themes/tiddlywiki/vanilla/metrics/storytop"><<lingo Metrics/StoryTop>></$link><br>//<<lingo Metrics/StoryTop/Hint>>// |^<$edit-text tiddler="$:/themes/tiddlywiki/vanilla/metrics/storytop" default="" tag="input"/> |
 |<$link to="$:/themes/tiddlywiki/vanilla/metrics/storyright"><<lingo Metrics/StoryRight>></$link><br>//<<lingo Metrics/StoryRight/Hint>>// |^<$edit-text tiddler="$:/themes/tiddlywiki/vanilla/metrics/storyright" default="" tag="input"/> |
 |<$link to="$:/themes/tiddlywiki/vanilla/metrics/storywidth"><<lingo Metrics/StoryWidth>></$link><br>//<<lingo Metrics/StoryWidth/Hint>>// |^<$edit-text tiddler="$:/themes/tiddlywiki/vanilla/metrics/storywidth" default="" tag="input"/> |
+|<$link to="$:/themes/tiddlywiki/vanilla/metrics/storyminwidth"><<lingo Metrics/StoryMinWidth>></$link><br>//<<lingo Metrics/StoryMinWidth/Hint>>// |^<$edit-text tiddler="$:/themes/tiddlywiki/vanilla/metrics/storyminwidth" default="" tag="input"/> |
 |<$link to="$:/themes/tiddlywiki/vanilla/metrics/tiddlerwidth"><<lingo Metrics/TiddlerWidth>></$link><br>//<<lingo Metrics/TiddlerWidth/Hint>>//<br> |^<$edit-text tiddler="$:/themes/tiddlywiki/vanilla/metrics/tiddlerwidth" default="" tag="input"/> |
 |<$link to="$:/themes/tiddlywiki/vanilla/metrics/sidebarbreakpoint"><<lingo Metrics/SidebarBreakpoint>></$link><br>//<<lingo Metrics/SidebarBreakpoint/Hint>>// |^<$edit-text tiddler="$:/themes/tiddlywiki/vanilla/metrics/sidebarbreakpoint" default="" tag="input"/> |
 |<$link to="$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth"><<lingo Metrics/SidebarWidth>></$link><br>//<<lingo Metrics/SidebarWidth/Hint>>// |^<$edit-text tiddler="$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth" default="" tag="input"/> |
diff --git a/themes/tiddlywiki/vanilla/sidebar-resizer.tid b/themes/tiddlywiki/vanilla/sidebar-resizer.tid
index 62501681a..933f4954e 100644
--- a/themes/tiddlywiki/vanilla/sidebar-resizer.tid
+++ b/themes/tiddlywiki/vanilla/sidebar-resizer.tid
@@ -147,21 +147,21 @@ code-body: yes
 	<% endif %>
 
 	.tc-story-river {
-		width: max(min(calc(({{$:/state/sidebar/dimensions!!story-river-percentage}} * 100vw) - ({{$:/state/sidebar/dimensions!!widget-node-width}}px - 100vw + {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}}) - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}}),{{$:/themes/tiddlywiki/vanilla/metrics/storyminwidth}});
+		width: min(max(min(calc(({{$:/state/sidebar/dimensions!!story-river-percentage}} * 100vw) - ({{$:/state/sidebar/dimensions!!widget-node-width}}px - 100vw + {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),calc((100vw - {{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}}) - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),{{$:/themes/tiddlywiki/vanilla/metrics/storyminwidth}}),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}}) - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}});
 	}
 
 	.tc-sidebar-scrollable {
-		width: min(max(calc({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw),calc({{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}} - 22px)),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyminwidth}} - ({{$:/state/sidebar/dimensions!!widget-node-width}}px - 100vw + {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}}) - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}} - 22px));
+		width: max(min(max(calc({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw),calc({{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}} - 22px)),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyminwidth}} - ({{$:/state/sidebar/dimensions!!widget-node-width}}px - 100vw + {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}}) - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}} - 22px)),calc({{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}} - 22px));
 	}
 
 	.tc-sidebar-resizer-pointerdown-eventcatcher {
 		right: auto;
-		max-width: max(min(calc((100% + ({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw) + 22px) - (100vw - 100% - 22px - ({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw))),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}}));
-		min-width: max(min(calc((100% + ({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw) + 22px) - (100vw - 100% - 22px - ({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw))),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}}));
+		max-width: min(max(min(calc((100% + ({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw) + 22px) - (100vw - 100% - 22px - ({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw))),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),100vw);
+		min-width: min(max(min(calc((100% + ({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw) + 22px) - (100vw - 100% - 22px - ({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw))),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}})),100vw);
 	}
 
 	.tc-sidebar-resizer {
-		right: min(max(calc({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw),calc({{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}} - 22px)),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyminwidth}} - ({{$:/state/sidebar/dimensions!!widget-node-width}}px - 100vw + {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}}) - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}} - 22px));
+		right: max(min(max(calc({{$:/state/sidebar/dimensions!!sidebar-percentage}} * 100vw),calc({{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}} - 22px)),calc(100vw - {{$:/themes/tiddlywiki/vanilla/metrics/storyminwidth}} - ({{$:/state/sidebar/dimensions!!widget-node-width}}px - 100vw + {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}}) - {{$:/themes/tiddlywiki/vanilla/metrics/storyleft}} - 22px)),calc({{$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth}} - 22px));
 	}
 
 <% endif %>