The bolt pattern is called "5 on 4 1/2". This means that there are 5 bolts, and they are located on a 4 1/2-inch circle. There are a couple ways to measure the size of the circle, but since there is no other size near it, precision isn't necessary.
You would do well to confirm this on your 2720 TM, as at least one exception has popped up.
Bill
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