What is the actual gauge of the model?
It's a toy train so does not have a railway modeller gauge as such .. it says on the box the scale is 1/55th for what that's worth
Without modifications the wheels site just over 16.5mm gap rails (00 or On30. I use ON30 as it looks better as has bigger sleepers and gaps) . They could be modified to sit on the rails , but I did not think worth the effort as it looked ok overall to me sitting over the rails , after all it's a wargmers train not a fine scale railroad effort