It is possible to make many compatible radii using a combination of Radius and small straights as follows:
KAT-20-150 (28 1/4″) Radius , KAT-20-160 (19″) Radius 15º , KAT-20-140 (15″) Radius 30º , and
KAT-20-091 Short Track Assortment 29mm (1 1/8″) [8 pcs], 45.5mm (1 3/4″) [2 pcs]
The following Picture shows how to arrange the pieces to make larger curves.
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