Valid to UK only - excludes oversized items
A back to back gauge is a tool which when placed between the back plates of the wheels of your wagons, carriages and locomotives will give you an accurate gap measurement allowing you to adjust the wheel spacing.
This enables to always have your rolling stock running at its best and will also help with those annoying derailments.
Make sure you select the gauge suitable for your track. For instance a P4 or EM gauge is wider than a standard OO gauge.
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