@SANTIAGOP23 posted:A quick search for HO scale wheels will get you the following... wheel threads, flanges and axels are so far out of scale they can only be compared with 3 rail. Also, note how all set have pointed axels. Us 2 railers have become accustomed to ball bearings not only in engines but in every piece of rolling stock. I believe that the only importer to do that for 3 rail is 3rd Rail, and that was by the way of two railers. All of the examples below are standard HO... crazy huh?
Fair enough, I didn't realize that HO wheels were so off from the prototype. That said, I did the math on them based on the NMRA standards...
| Flange Depth | Wheel Width | FD Error | WW Error | |
| 1:1 | 1-1.5" (1.25 avg.) | 5.5" | -- | -- |
| O 3R | 4.56" | 13.2" | 265% | 140% |
| O 2R | 1.73" | 6.96" | 38% | 27% |
| HO | 2.44" | 9.58" | 95% | 74% |
Values are scaled up 1:48 and 1:87.1 respectively.
Looking at gauge error... though, 2R and 3R O have an error of 6% while HO has an error of close to nothing.
By this account, I'd say that HO is worse than, but closer to O 2R for flange depth and wheel width. If you substitute in fine scale wheels for HO, that improves considerably past O 2R.
