The standard NARCorp HO Scale wheelsets have a tread/flange width of 7 scale inches instead of the nominal 10 to 15 scale  inches. This can cause the flange to catch on certain turnouts with a notched rail at the switch points. This problem is most frequently seen on Atlas Code 100 track. For these customers, these wider tread wheelsets can be used to retrofit their cars and address this issue.

Modelers using any of the following track or turnouts will not need to replace the wheels: 

• Walthers Shinohara
• Peco
• Kato
• Micro Engineering

PLEASE NOTE: These wheels will not work properly on any other manufacture's trucks. The very high performance, low friction charactistics of North American Railcar Corporation cars are the result of the design features of both the truck and wheelset and neither part can be used with parts from other manufacturers. 

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