Are you measuring bolt to bolt? If so, that measurement is going to be a little less than the bolt circle diameter because the bolts aren't exactly across from each other.
Measure the distance between the centers of adjacent lugs. If it's 2-5/8" then it's a 4½" bolt circle.
5x4½ is the standard bolt pattern for most trailer wheels. For some trivia. It's the bolt pattern of the Ford Ranger wheels.
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Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
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