Trixbrix Narrow Curved Track R72
|Color:||Dark Bluish Gray|
RadiusR72 is the radius measured from the center of a circle to the centerline between the rails using the LEGO stud as the unit. A LEGO stud is 8mm.
The space needed to have the full R72 circle can be calculated as follows: (72 + 4) * 2 * 8mm = 1216mm = 1.22m.
This measures the diameter (2 * radius) of the outer shape of the track - that's why we added 4 studs in the formula.
In general, the formula for calculating the outer diameter of a circle track is:
(R + 4) * 2 * 8mm