diff --git a/Assets/Prefab/Part/Building/BasicTire.prefab b/Assets/Prefab/Part/Building/BasicTire.prefab
index 55ad433..e70f8a2 100644
--- a/Assets/Prefab/Part/Building/BasicTire.prefab
+++ b/Assets/Prefab/Part/Building/BasicTire.prefab
@@ -203,8 +203,8 @@ BoxCollider:
   m_IsTrigger: 0
   m_Enabled: 1
   serializedVersion: 2
-  m_Size: {x: 0.31299046, y: 0.9060723, z: 0.9030622}
-  m_Center: {x: 0, y: 0, z: 0}
+  m_Size: {x: 0.31299046, y: 0.9229157, z: 0.9030622}
+  m_Center: {x: 0, y: -0.22177482, z: 0}
 --- !u!114 &5573408519385158023
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -217,8 +217,8 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: f2211cf0b3c94b189ae6cc6794db361b, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  removable: 1
-  partName: BasicTire
   mass: 20
+  partName: BasicTire
+  removable: 1
   collider: {fileID: 2160681236945319564}
   tireName: 
diff --git a/Assets/Prefab/Part/Play/BasicTire.prefab b/Assets/Prefab/Part/Play/BasicTire.prefab
index 084d5f4..f605ca6 100644
--- a/Assets/Prefab/Part/Play/BasicTire.prefab
+++ b/Assets/Prefab/Part/Play/BasicTire.prefab
@@ -201,6 +201,7 @@ GameObject:
   - component: {fileID: 3923196539191495623}
   - component: {fileID: 3226723001406992128}
   - component: {fileID: 4734048834668821019}
+  - component: {fileID: 8195048015080138190}
   m_Layer: 0
   m_Name: BasicTire
   m_TagString: Untagged
@@ -235,8 +236,8 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 782460a61c9c454b9fda77e87e8e3e01, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  innerMesh: {fileID: 212465993580246236}
   _tireComponent: {fileID: 4734048834668821019}
+  innerMesh: {fileID: 212465993580246236}
   tireMeshRoot: {fileID: 0}
   wheelCollider: {fileID: 0}
 --- !u!114 &4734048834668821019
@@ -251,5 +252,19 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 1416999b371041a993ba1d4cc6fa7c56, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  bearing: 0
   baseSteerAngle: 0
+  bearing: 0
+  WheelCollider: {fileID: 0}
+--- !u!65 &8195048015080138190
+BoxCollider:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 5299458965186968501}
+  m_Material: {fileID: 0}
+  m_IsTrigger: 0
+  m_Enabled: 1
+  serializedVersion: 2
+  m_Size: {x: 0.3406933, y: 0.42197776, z: 0.9126946}
+  m_Center: {x: 0, y: 0, z: 0}
diff --git a/Assets/Scripts/Main/DesignLoaderPlay.cs b/Assets/Scripts/Main/DesignLoaderPlay.cs
index d77fd81..614506d 100644
--- a/Assets/Scripts/Main/DesignLoaderPlay.cs
+++ b/Assets/Scripts/Main/DesignLoaderPlay.cs
@@ -3,6 +3,7 @@
 using Building;
 using Photon.Pun;
 using UnityEngine;
+using Utility;
 
 namespace Main
 {
@@ -29,28 +30,6 @@ public void BuildRobotRpc(object data)
             BuildRobot(structure);
         }
 
-        private void ReplaceColliders()
-        {
-            var newColliderRelativeBounds = new Bounds(Vector3.zero, Vector3.zero);
-            var buffer = new Vector3(1, 0, 1) * 2 * ColliderBuffer;
-
-            foreach (var boxCollider in structureRoot.GetComponentsInChildren<BoxCollider>())
-            {
-                var colliderBounds = new Bounds(
-                    boxCollider.transform.localPosition,
-                    boxCollider.size + buffer);
-
-                newColliderRelativeBounds.Encapsulate(colliderBounds);
-
-                Destroy(boxCollider);
-            }
-
-            var newBoxCollider = structureRoot.gameObject.AddComponent<BoxCollider>();
-            newBoxCollider.center = Vector3.zero;
-            newBoxCollider.size = newColliderRelativeBounds.size;
-            _robotRigidbody.centerOfMass = Vector3.zero;
-        }
-
         public void BuildRobot(RobotStructure structure = null)
         {
             LoadPartListIntoDict();
@@ -62,7 +41,6 @@ public void BuildRobot(RobotStructure structure = null)
             }
             
             CreateParts(structure);
-            ReplaceColliders();
 
             robotMain.OnPartsLoaded();
         }
diff --git a/Assets/Scripts/Utility/MetaUtility.cs b/Assets/Scripts/Utility/MetaUtility.cs
index ade5c0f..c9c71be 100644
--- a/Assets/Scripts/Utility/MetaUtility.cs
+++ b/Assets/Scripts/Utility/MetaUtility.cs
@@ -66,5 +66,10 @@ public static void DestroyImmediateAllChildren(GameObject gameObject)
             foreach (Transform child in gameObject.transform)
                 UnityEngine.Object.DestroyImmediate(child.gameObject);
         }
+
+        public static Vector3 Vector3Abs(Vector3 vector)
+        {
+            return new Vector3(Mathf.Abs(vector.x), Mathf.Abs(vector.y), Mathf.Abs(vector.y));
+        }
     }
 }
\ No newline at end of file
diff --git a/ProjectSettings/EditorBuildSettings.asset b/ProjectSettings/EditorBuildSettings.asset
index 3fd15c1..7f07d37 100644
--- a/ProjectSettings/EditorBuildSettings.asset
+++ b/ProjectSettings/EditorBuildSettings.asset
@@ -17,7 +17,7 @@ EditorBuildSettings:
   - enabled: 1
     path: Assets/Scenes/BuildScene.unity
     guid: d950b2e5c72befc4798a2812dd7fa1fb
-  - enabled: 1
+  - enabled: 0
     path: Assets/Scenes/NewMainMenu.unity
     guid: dd1b1c3cdb239af45af5bc3baf78e8c5
   m_configObjects:
diff --git a/ProjectSettings/GraphicsSettings.asset b/ProjectSettings/GraphicsSettings.asset
index 4706883..fcda775 100644
--- a/ProjectSettings/GraphicsSettings.asset
+++ b/ProjectSettings/GraphicsSettings.asset
@@ -38,6 +38,7 @@ GraphicsSettings:
   - {fileID: 16000, guid: 0000000000000000f000000000000000, type: 0}
   - {fileID: 16001, guid: 0000000000000000f000000000000000, type: 0}
   - {fileID: 17000, guid: 0000000000000000f000000000000000, type: 0}
+  - {fileID: 16002, guid: 0000000000000000f000000000000000, type: 0}
   m_PreloadedShaders: []
   m_SpritesDefaultMaterial: {fileID: 10754, guid: 0000000000000000f000000000000000,
     type: 0}
diff --git a/ProjectSettings/ProjectSettings.asset b/ProjectSettings/ProjectSettings.asset
index 28cea3e..03469d6 100644
--- a/ProjectSettings/ProjectSettings.asset
+++ b/ProjectSettings/ProjectSettings.asset
@@ -121,7 +121,7 @@ PlayerSettings:
     16:10: 1
     16:9: 1
     Others: 1
-  bundleVersion: 0.3.4-dev.4
+  bundleVersion: 0.3.4-alpha.1
   preloadedAssets:
   - {fileID: 0}
   - {fileID: 0}