I have finally written a kind of synopsis about my knowledge of wheels in the blog: More about wheels - TrainBoard.com If there are still bugs in it, or something is wrong, please say so :tb-cool:
There are a few threads with information on axle lengths. The issue is more relevant as some modelers do switch to metal wheels. This thread tries to give information in proper axles and the advantages of each. It is not a commentary on the issue of plastic vs. metal wheels. The best starting point is christoph's blog linked in the post above. If you wish to comment, please go to the appropriate thread anc make a post there as this thread is locked. making a post will move the thread to the "top" in the TB list of forums. Thanks. Additional search terms: Micro Trains plastic gauge gage