size of hub centric rings for Candian Tire steel rims
 

I know that for most aftermarket rims the inside diameter on the rims are usually 73mm. I did a measurement on my Canadian tire Steel rims that I bought for my winter tires and they measured 71.9 mm. Has anyone bought any hub centric rings for their canadian tire steel wheels? I wanted to find out what size of rings they purchased. 72mm isn't a standard size so I want to know if someone can confirm this measurement?

the rim was the 15" with the 5 bolt pattern.