diff --git a/src/states/linear/constants.rs b/src/states/linear/constants.rs
index ae03297..3099699 100644
--- a/src/states/linear/constants.rs
+++ b/src/states/linear/constants.rs
@@ -6,8 +6,13 @@ pub const CENTER_Y: f32 = 0.0;
 
 // pub const FACTOR_RADIUS: f32 = FACTOR as f32 / 2.0;
 
+// основная размерность и масштаб
+pub const SCALE: f32 = 1.0;
 pub const STEP: f32 = FACTOR as f32 / SCALE;
-pub const SCALE: f32 = 2.0;
+
+// зависимые размеры
+pub const ROUND_BALL_SIZE: f32 = STEP;
+pub const BALL_RADIUS: f32 = ROUND_BALL_SIZE / 2.0;
 
 // Z-INDEXES
 pub const ROUND_BALL_Z: f32 = 10.0;
diff --git a/src/states/linear/system_ball.rs b/src/states/linear/system_ball.rs
index b74b174..be907ed 100644
--- a/src/states/linear/system_ball.rs
+++ b/src/states/linear/system_ball.rs
@@ -26,7 +26,7 @@ pub fn spawn_round_ball(
         commands.spawn((
             Sprite {
                 image,
-                custom_size: Some(Vec2::splat(STEP)),
+                custom_size: Some(Vec2::splat(ROUND_BALL_SIZE)),
                 ..default()
             },
             Transform::from_translation((track.segments[0].start_pos).extend(ROUND_BALL_Z)),