diff --git a/layouts/_default/single.html b/layouts/_default/single.html
index 036513232..735a7c701 100644
--- a/layouts/_default/single.html
+++ b/layouts/_default/single.html
@@ -4,8 +4,10 @@
 {{ end }}
 
 {{ define "main" }}
+  {{- $related_content := .RegularPages.Related . -}}
+  {{- $needs_aside := or .Params.toc $related_content -}}
   {{ $section := .Site.GetPage "section" .Section }}
-  <article class="flex-l flex-wrap justify-between mw8 center ph3">
+  <article class="flex-l flex-wrap justify-between {{ if $needs_aside }}mw8{{ else }}mw7{{ end }} center ph3">
     <header class="mt4 w-100">
       <aside class="instapaper_ignoref b helvetica tracked ttu">
           {{/*
@@ -47,7 +49,7 @@ <h1 class="f1 athelas mt3 mb1">
         <span class="f6 mv4 dib tracked"> - {{ i18n "wordCount" .WordCount }} </span>
       {{ end }}
     </header>
-    <div class="nested-copy-line-height lh-copy {{ $.Param "post_content_classes"  | default "serif"}} f4 nested-links {{ $.Param "text_color" | default "mid-gray" }} {{ cond (eq $.Site.Language.LanguageDirection "rtl") "pl4-l" "pr4-l" }} w-two-thirds-l">
+    <div class="nested-copy-line-height lh-copy {{ $.Param "post_content_classes"  | default "serif"}} f4 nested-links {{ $.Param "text_color" | default "mid-gray" }} {{ cond (eq $.Site.Language.LanguageDirection "rtl") "pl4-l" "pr4-l" }} {{ if $needs_aside }}w-two-thirds-l{{ else }}w-100-l{{ end }}">
       {{- .Content -}}
       {{- partial "tags.html" . -}}
       <div class="mt6 instapaper_ignoref">
@@ -59,10 +61,11 @@ <h1 class="f1 athelas mt3 mb1">
       {{ end }}
       </div>
     </div>
-
+    {{- if $needs_aside -}}
     <aside class="w-30-l mt6-l">
       {{- partial "menu-contextual.html" . -}}
     </aside>
+    {{- end -}}
 
   </article>
 {{ end }}