If Disney past history is any guide, just about everyone will be able to ride. I know of no tester vehicles.Have heard seats are small... I know each person has own pull down lap restraint and have read 2 larger adults can't ride together. Is there a tester car outside the line? Has anyone rode that was pooh sized? Hard to find any more details.
If someone who is 5'0 and 110 lbs claims it is "snug", there may be issues.
In the second link in my PP, there are comments from those who could not fit due to the lap bar and they exited without riding.That's more in general stuff. Looking for specifically comments on fitting in the mine train ride. Don't care to read about what people wear...
I just rode the it on Friday and I agree with Kenny! I am pooh sized and it's a tight fit. I do think 2 larger people can fit together but the molded seats are always too small but my issues was with the separate lap bars they had bars that go on each side of your legs so if your bottom heavy or larger legs it's super tight!! It's not a long ride but it was uncomfortable and I don't have a problem with most other stuff at all.Kenny posted on FB yesterday that larger guests will find SDMT "painful"