S3 S Sn3 G min .883 .563 G max .905 .585 C min .839 .519 S max .799 .479 F max .053 .053 H min .030 .030 P max .819 .499 S4 S Sn3 K max .839 .519 B min .800 .480 N min .108 .108 D max .030 .030

Notes :

1) For further explanation of track & wheel standards and uses refer to NMRA Standards S2, S3, S4 and RP6.

2) Recommended wheel contour code 110, also see RP25.

3) These standards were jointly engineered by NASG and NMRA