Wheel Standards
	Description	G1R
	A Tyre Width	4.5mm
	C Tyre Coning	3°
	D Flange Depth	0.9mm
	E Flange Width	0.9mm
	F Chamfer Depth	0.2mm
	Root Radius between flange and tread	0.5mm
	Flange tip radius	0.45mm
Track Standards
	Description	G1R
	G Gauge	45.0mm
	TBB Over check rails	42.0mm
	WBB Wheel back-to-back	42.20mm
	TCG Track Check Gauge	43.50mm
	WCG Wheel Check Gauge	43.10mm
	FW Flangeway	1.5mm
	Gauge widening for use with curves under 3m radius
	G Gauge	45.50mm
	FW Flangeway	2.0mm
Notes:
Wheels must have a back-to-back not less than the over check rails value of 42.0mm.
The wheel check gauge (back of one flange to face of the other) must not exceed 43.5mm.
Some form of springing or compensation is recommended when using these standards.
It is recommended that gauge widening is exercised (as noted above) when using these standards.

Last revised 31st October 2006, Simon Dunkley & Simon Castens. (Slight change to back to back to guarantee compatibility with G1 Fine)