What Factory roll bar size front and rear

I news to do something a little red neck style and i need to know if someone know the size if the factory roll bar i did take some mesurment and it gave My 2 3/4 on the front tube and 3 1/2 on the back tube is it right or what is the Good spec can fine anything on the web for that ?

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Rear tube is def 2.25" with no padding, and I believe 2 3/4" with padding.

Thx but i found the twist to My problem insert nut

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