Correct size wheelsets for HO scale rolling stock

[Boski]

Hello,

 I am looking to change out the plastic wheel sets on my rolling stock to metal. I model the modern era. I want to put the correct prototypical size wheel sets on my cars. I have both 33" and 36" wheel sets. The size of the wheels that come/came with the cars, I know, are not the correct prototypical size. My rolling stock consist of all different types of cars:box, flat, bulkhead, covered hoppers, coal, tanker, inter-modal, etc., early 70's to now time periods. I am looking for information on what size wheel sets typically go on what type of cars. Your help will be much appreciated. 

 

Thanks, Jim

[markpierce]

I would have thought the wheel sizes on your models would be correct.

The 33"-diameter wheels are standard for freight cars of up to 70 tons capacity.  For up to 100 tons, 36" is used.  For 125 tons, it is 38".  Nevertheless, 28" wheels are used on triple-deck auto-rack cars to allow adequate clearance.  (Source: Kalmbach's The Model Railroader's Guide to Freight Cars)

[loathar]

markpierce

  Nevertheless, 28" wheels are used on triple-deck auto-rack cars to allow adequate clearance.  (Source: Kalmbach's The Model Railroader's Guide to Freight Cars)

Thanks Mark! I didn't know that! Allways wondered what 28's were used for.

[Phoebe Vet]

How about the various styles and weights of passenger cars?

[ATLANTIC CENTRAL]

Phoebe Vet

How about the various styles and weights of passenger cars?

Well, I have not kept up with all the tech details in the last 20 years or so, but from 1890 well into the 1980's almost all passenger cars have 36" wheels. Heavyweight, lightweight, steel or wood, 3 axles or 2, 36" is pretty much standard.

I know there are a few exceptions, but they escape me at the moment.

Sheldon

[Phoebe Vet]

Thanks Sheldon.  I am in the process of replacing all the wheels on my 3 axle heavyweight DL&W cars.

[WSOR 3801]

 Most modern cars get 36" wheels.  Some boxcars, other lower-capacity cars would get 33" wheels.  Sometimes adding the bigger wheels can get a car closer to proper coupler height (older Athearn cars especially).  If the cars are purchased recently, the included metal wheels are usually just fine.