Standard S4.5: Wheels - Narrow Gauge

Check Gauge maxmium	Kmax	0.519"	13.18mm
Back to Back minimum	Bmin	0.480"	12.20mm
Tire Width minimum	Nmin	0.108"	2.74mm
Flange Depth maximum	Dmax	0.030"	0.76mm

Standards and Clearance Diagrams

• Track and Wheel Standards - NASG/NMRA standards
  • Track, Standard Gauge S 3
  • Track, Narrow Gauge S 3.5
  • Wheels, Standard Gauge S 4
  • Wheels, Narrow Gauge S 4.5
  • Track, Proto: 64 RP 3
  • Wheels, Proto: 64 RP 4
  • The NASG Clearinghouse offers track and wheel gauges for S standard gauge.
• NMRA Standards
  • standard-gauge NMRA turnout dimensions (RP 12.3)
  • The NMRA recommended practice for car weight is 2 oz. plus another 1/2 oz. per inch of car length.
  • Sn3 track and wheel gauges are available from the NMRA.
• Clearance Diagrams and Gauges
  • older (pre-stack car era) clearance template (PDF)
  • newer " Plate H" clearance template (PDF)
  • If you prefer to purchase a clearance gauge instead of making one, S clearance gauges are available from banta modelworks made of either wood or acrylic.