diff --git a/src/bike.rs b/src/bike.rs
index 0a38311..6abf8a4 100644
--- a/src/bike.rs
+++ b/src/bike.rs
@@ -162,7 +162,7 @@ fn spawn_children(
             WheelConfig::new(
                 FRONT_ATTACH,
                 REST_DISTANCE,
-                SPRING_CONSTANT,
+                SPRING_CONSTANT - 5.0,
                 DAMPING_CONSTANT,
                 FRICTION_COEFF,
                 WHEEL_RADIUS,
@@ -183,7 +183,7 @@ fn spawn_children(
             WheelConfig::new(
                 REAR_ATTACH,
                 REST_DISTANCE,
-                SPRING_CONSTANT,
+                SPRING_CONSTANT + 10.0,
                 DAMPING_CONSTANT,
                 FRICTION_COEFF,
                 WHEEL_RADIUS,