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I think you'll find that the NMRA back to back for RP25/110 wheels is 14.4mm , and therefore matches the DOGA Intermediate standard.

The finer wheels Richard is thinking about would be to RP25/88 and are a different matter . The nearest equivalent would be EM profile wheels (eg Gibsons) , which is what is defined by the DOGA Finescale standard, and that has a Back to Back value of 14.8mm

The DOGA Commercial/Intermediate standards have a revision date of 2004 , which is not "a long time ago" , and by definition a track standard and a wheel standard are two halves of a single whole . If you want to use wheels that don't matchwheel standard A, then it is not surprising if they don't then fit Track Standard A perfectly..

14.5mm has nothing to do with either DOGA or the NMRA , bvut is the old BRMSB figure , and I'd certainly not want to puish current RTR wheels out to 14.7mm or 14.8mm or anything between. That is simply going to ensure the check rails completely fail to operate
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