diff --git a/src/modules/simu/simuv2.1/car.cpp b/src/modules/simu/simuv2.1/car.cpp
index 3371b012..e0525ea9 100644
--- a/src/modules/simu/simuv2.1/car.cpp
+++ b/src/modules/simu/simuv2.1/car.cpp
@@ -64,9 +64,9 @@ SimCarConfig(tCar *car)
 		car->fuel = car->tank;
 	}
 	k = k * k;
-	car->Iinv.x = 12.0 / (car->mass * (car->dimension.y * car->dimension.y + car->dimension.z * car->dimension.z));
-	car->Iinv.y = 12.0 / (car->mass * (car->dimension.x * car->dimension.x + car->dimension.z * car->dimension.z));
-	car->Iinv.z = 12.0 / (car->mass * (car->dimension.y * car->dimension.y + k * car->dimension.x * car->dimension.x));
+	car->Iinv.x = 12.0 / (car->mass * k * (car->dimension.y * car->dimension.y + car->dimension.z * car->dimension.z));
+	car->Iinv.y = 12.0 / (car->mass * k * (car->dimension.x * car->dimension.x + car->dimension.z * car->dimension.z));
+	car->Iinv.z = 12.0 / (car->mass * k * (car->dimension.y * car->dimension.y + car->dimension.x * car->dimension.x));
 	
 	/* configure components */
 	w = car->mass * G;