Standard Curve Unit 762mm (30in) radius 12 per circlePECO Setrack SM 32 CODE 200 Standard Curve, 1st Radius A popular size especially in the garden, SM 32 models are built to a scale of 16mm foot and run on a gauge of 32mm, the equivalent of a two foot gauge railway. SM 32 has become the first choice for many narrow gauge enthusiasts who want to operate live steam locomotives by radio control, the large size of the locomotives means plenty of room for the receiver and control servos. The ST 605 provides