 		@knob.draggable.momentumOptions = {friction: 5, tolerance: 0.25}
 		@knob.draggable.bounce = false
 		@knob.draggable.propagateEvents = false
-		@knob.borderRadius = @knobOverlay.borderRadius = @knobSize / 2
+		@knob.borderRadius = @knobSize / 2
+		@knobOverlay.borderRadius = (@knob.borderRadius * 2) + (@hitArea / 4)
 
 		# If hitArea isn't defined, remove the overlays
 		if not @hitArea

			name: "fill"

		@knobOverlay = new Layer
			backgroundColor: null
			name: "knobOverlay"

		@sliderOverlay = new Layer
			backgroundColor: null
			name: "sliderOverlay"

		super options

		@fill.style.borderRadius = "#{radius}px 0 0 #{radius}px"

	_setOverlayRadius: =>
		@knobOverlay.borderRadius = (@knob.borderRadius * 2) + (@hitArea / 4)

	@define "bounded", @simpleProperty("bounded", false)

