Radius 220 mm / 8-11/16". 30° Curve.

Charlie's Tips: These pieces are 30 degrees each. That means that 6 pieces make a half circle.

The radius is 220mm, which is close to 8-11/16 inches. That means that a half or full circle has a diameter of 17-3/8 inches. This is measured from the center of the track piece to the center of the opposite track piece.

The second picture shows the track geometry

• For a full circle you need 12 pieces
• For a half circle you need 6 pieces
• For a 90 degree turn (quarter circle) you need 3 pieces
• For a tighter circle, use 8520
• For a very tight circle, use 8510

If you would like a full box, order 10 pieces, they are packed in box of 10.

Track 8530 is the same radius curve. It is longer, and spans 45 degrees.