StephenC 10 Report post Posted January 29, 2013 (edited) So I had a custom rear end made for my 69 FB project and I'm just getting now getting around to getting all the parts together. My question is I'm not sure what size axle U-Bolts it takes for the leaf springs, I looked for some references and they all say the ID of the U-Bolt should be 3.25" but I measured the circumference of my axle tube and it measured 9.5" so wouldn't I need an axle bolt with an ID of 4.75'? Am I missing something here or did the builder just use a bigger size axle tube? Any input is appreciated. Also if I do need a 4.75" U-Bolt anyone know where I can find one, I looked all over and found nothing and I doubt a homedepot U-Bolt would suffice and hold up. Thanks. Edited January 29, 2013 by StephenC Quote Share this post Link to post Share on other sites
RPM 1,190 Report post Posted January 29, 2013 9 1/2" circumference is 3" diameter. Multiply diameter by pi for circumference. Bob Quote Share this post Link to post Share on other sites
StephenC 10 Report post Posted January 29, 2013 9 1/2" circumference is 3" diameter. Multiply diameter by pi for circumference. Bob I should of paid better attention in high school, I feel pretty dumb now. Lol I feel pretty dumb now. Quote Share this post Link to post Share on other sites
