diff --git a/resources/extruders/monoprice_select_mini_v1_extruder_0.def.json b/resources/extruders/monoprice_select_mini_v1_extruder_0.def.json
index eef47c9b6f..e4a899d7af 100644
--- a/resources/extruders/monoprice_select_mini_v1_extruder_0.def.json
+++ b/resources/extruders/monoprice_select_mini_v1_extruder_0.def.json
@@ -11,6 +11,6 @@
     "overrides": {
         "extruder_nr": { "default_value": 0 },
         "machine_nozzle_size": { "default_value": 0.4 },
-        "material_diameter": { "default_value": 2.85 }
+        "material_diameter": { "default_value": 1.75 }
     }
 }
diff --git a/resources/extruders/monoprice_select_mini_v2_extruder_0.def.json b/resources/extruders/monoprice_select_mini_v2_extruder_0.def.json
index e0899304dd..b727cfce1f 100644
--- a/resources/extruders/monoprice_select_mini_v2_extruder_0.def.json
+++ b/resources/extruders/monoprice_select_mini_v2_extruder_0.def.json
@@ -11,6 +11,6 @@
     "overrides": {
         "extruder_nr": { "default_value": 0 },
         "machine_nozzle_size": { "default_value": 0.4 },
-        "material_diameter": { "default_value": 2.85 }
+        "material_diameter": { "default_value": 1.75 }
     }
 }