RJR posted:The last two digits of the MTH part number are the diameter in mm. Thus, there must be errors in Bob D's list above.
The MTH traction tire chart is not quite correct when it says all diesels. The Ingersoll-Rand boxcab uses much smaller tires. It is also a bit aged. I haven't checked what the 44-tonner uses.
When I made the list, I measured the wheels on the engines then tried to find the engine on the MTH chart BobB linked to. The RK USRA 0-6-0 states (in the MTH chart) to use the DE0000023 tire, but the wheels measured 27mm, if I got the model of the 0-6-0 correct. That's the problem with the MTH chart, they should have used the 20-XXXXX-1 and 30-XXXXX-1 engine P/N they use every where else.
If the tire requires stretching anyway, then maybe those numbers in my chart are correct. I haven't lost one yet due to over-stretching.
Granted, some of them I simply guessed at, using what little data the MTH chart provided. I figure a bit of stretching is better than being on the get go.
I'll be glad to make changes to my chart so people can use it IF someone can provide accurate data. This is something that is really needed IMO. Nothing worse than buying a set of replacement tires only to find out they don't fit. And it's almost impossible to "try them on" like a pair of shoes.
