diff --git a/libraries/SITL/SIM_Rover.cpp b/libraries/SITL/SIM_Rover.cpp
index 6c5156f92c..c069b63ee1 100644
--- a/libraries/SITL/SIM_Rover.cpp
+++ b/libraries/SITL/SIM_Rover.cpp
@@ -28,8 +28,6 @@ SimRover::SimRover(const char *home_str, const char *frame_str) :
     Aircraft(home_str, frame_str),
     max_speed(20),
     max_accel(30),
-    wheelbase(0.335),
-    wheeltrack(0.296),
     max_wheel_turn(35),
     turning_circle(1.8),
     skid_turn_rate(140), // degrees/sec
diff --git a/libraries/SITL/SIM_Rover.h b/libraries/SITL/SIM_Rover.h
index bf5c1b8db2..75e59687be 100644
--- a/libraries/SITL/SIM_Rover.h
+++ b/libraries/SITL/SIM_Rover.h
@@ -41,8 +41,6 @@ public:
 private:
     float max_speed;
     float max_accel;
-    float wheelbase;
-    float wheeltrack;
     float max_wheel_turn;
     float turning_circle;
     float skid_turn_rate;