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wheel bolt circle


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Hey Pontiac guys: I posted this inquiry on the Oldsmobile site, and didn't get any response. I'm wondering which G.M. cars of the early to mid 30's had a wheel bolt circle of 4 1/4 inches. I'm thinking possibly Olds and Pontiac? Possibly others? I know Chev. had 6 bolts. Any response would helpful to me in identifying application of an old spare tire lock I have. My measurements tell me it fits 4 1/4 inch circle. Has a Hurd key with G.M stamped on it. Thanks

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Chevrolet Standard (not Master) in 1934, 1935, and 1936 use that weird 5 bolt pattern. I don't think anyone else inside or outside GM did.


I have never heard of that pattern on a Pontiac. In 1934, 1935, and 1936 Pontiac used the familiar Chevrolet 6-bolt pattern. In 1937, they switched to a large Buick/Olds 5-bolt pattern IIRC. Before 1934, I don't know.

Edited by Bloo (see edit history)
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