17,49 €
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Ballast Plate R72L Set - 8 pieces for 8 R72 tracks
Ballast Plate R72R Set - 8 pieces for 8 R72 tracks
This is a set containing 8 pieces of R72 curved tracks. Trixbrix R72 curves are one size bigger than R56. They can be laid in parallel to R56 maintaining a safe distance of 8 studs between the tracks. This way trains can safely pass and keeps your layout within absolute geometry making it easy and fun to build layouts. 
Detailed explanation of R72 radius
The R72 is the radius measured from the center of the circle to the centerline between the rails using the LEGO® stud as the unit. LEGO® stud is 8mm. The space needed to have the full R72 circle can be calculated as follows: (72 + 4) * 2 * 8mm = 1216mm = 1.21m. 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 the track circle is:
(R + 4) * 2 * 8mm
