diff --git a/automobiles_buggy/buggy_entities.lua b/automobiles_buggy/buggy_entities.lua
index 4a6adf5..eb3a862 100755
--- a/automobiles_buggy/buggy_entities.lua
+++ b/automobiles_buggy/buggy_entities.lua
@@ -553,7 +553,7 @@ minetest.register_entity("automobiles_buggy:buggy", {
 		end
 
         self._last_ground_check = self._last_ground_check + dtime
-        if self._last_ground_check > 0.15 then
+        if self._last_ground_check > 0.25 then
             self._last_ground_check = 0
             automobiles_lib.ground_get_distances(self, 0.372, 2.3)
         end
diff --git a/automobiles_roadster/roadster_entities.lua b/automobiles_roadster/roadster_entities.lua
index 832c591..4968b3c 100755
--- a/automobiles_roadster/roadster_entities.lua
+++ b/automobiles_roadster/roadster_entities.lua
@@ -526,7 +526,7 @@ minetest.register_entity("automobiles_roadster:roadster", {
 		end
 
         self._last_ground_check = self._last_ground_check + dtime
-        if self._last_ground_check > 0.15 then
+        if self._last_ground_check > 0.25 then
             self._last_ground_check = 0
             automobiles_lib.ground_get_distances(self, 0.5, 2.422)
         end