diff --git a/src/client/stores/CalculationStore/Effects/autorun.ts b/src/client/stores/CalculationStore/Effects/autorun.ts
index e429908..4bbab2e 100644
--- a/src/client/stores/CalculationStore/Effects/autorun.ts
+++ b/src/client/stores/CalculationStore/Effects/autorun.ts
@@ -88,11 +88,6 @@ const autorunEffects: IAutorunEffect[] = [
       } else {
         calculationStore.setValidation('tbxMaxMass', true);
       }
-      if (!withTrailer) {
-        calculationStore.setValidation('cbxWithTrailer', false);
-      } else {
-        calculationStore.setValidation('cbxWithTrailer', true);
-      }
     } else {
       calculationStore.setValidation('tbxMaxMass', true);
       calculationStore.setValidation('cbxWithTrailer', true);