I don't know if i'm being tricked, or i'm just going crazy...

I have a 71 Dodge Dart with factory 9" finned drum brakes. The brakes measure 2.25" wide.

I went to rockauto.com to find new brakes, but could only find 2" and 2.5" 9" brakes for my car...
I double-checked in a service manual, and it listed 2.25".
Then I went to two autoparts stores, and they also only had 2" and 2.5" 9" brakes for my car.

Am I going crazy? Or are they labeled differently on rockauto/at the autoparts store?

How wide are the linings? Have you taken the drums off and looked at them. Maybr they just overlap the backing plates by .25".

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The brake shoe lining measures 2.25"