The Stovebolt Site Forums The Shop Area Driveline Wheel help

I have a 1957 chevy 3100 truck with stock 15 inch 6 lug wheels. It is fitted with 7.00R 15 radial tires. I upgraded the front brakes to disc using POL's upgrade kit. Everything fit nice but the calipers rub on the wheel rims. I was warned of this by POL when I purchased it. So I need to have new wheel fabricated to fit the rims. I want to maintain the stock look.

Firstly, does anyone know what the standard rim size, set back and offset would be for a my stock wheel?

Or does anyone have experience or a recommendation for the proper wheel to use? I have found someone to fabricate the wheel for me but I need to give him the exact measurements: wheel width, set back, off set..... This is all new to ne so excuse my ignorance if I ask a redundant question.

Thanks in advance.
Gary

You can measure the offset and backspace yourself since you have the wheels.

https://www.tirerack.com/wheels/tech/techpage.jsp?gclid=CjwKCAjw1ICZBhAzEiwAFfvFhM-UOpliA_LrN7pg-IbWCWhs63Sq7qoaLN0WApw_U816Q9hdCkZMjBoCVDMQAvD_BwE&techid=101&ef_id=CjwKCAjw1ICZBhAzEiwAFfvFhM-UOpliA_LrN7pg-IbWCWhs63Sq7qoaLN0WApw_U816Q9hdCkZMjBoCVDMQAvD_BwE:G:s&s_kwcid=AL!3756!3!354820921610!p!!g!!wheel%20off%20set&gclsrc=aw.ds

https://www.4wheelparts.com/the-dirt/wheel-offset-versus-backspacing/?ecmp=p:google_219701836_46059342950__dsa-411977177228&utm_source=google&utm_medium=cpc&utm_campaign=DSA&gclid=CjwKCAjw1ICZBhAzEiwAFfvFhAAoRqoN0N1GzDZ3r1IxJQccXKAdbjTWDbXjcoLzfKKnmNPI52RZMBoCtVAQAvD_BwE

Yes I realize that, but its easier with the tire unmounted and I just paid someone to mount them. I was hoping that someone had a quick answer on stock rims.

I might suggest you get cheap [censored] wheel spacers, not to drive on but just to determine exactly how much more/less offset you need to meet your needs. Then calc your existing offset and order new rims from your specific data.

Not to state the obvious but I will (for those who don’t know) wheel spacers are not exactly recommended and certainly should be considered carefully… to be acceptable they need to be specific to the application….
1) they need to be hub centric
2)the studs need to long enough for the spacer + lug nut + 3 threads showing to be considered using.

Chuck

So do I want to adjust back spacing or offset in this case? I figured I needed about 1/4-1/2" less back space to accommodate the calipers.
Can anyone confirm what the stock wheels have for back space? I think its 4" but not certain

qside -- Thanks for joining our site! I think you will get the exact info you are looking for, but it may take up to 24 hours for all the folks to see this and respond with the info you need. There's guys on the site who can rattle that info off the tops of their heads ... you might have to be patient for them to see the question ...



While you wait, you could upload your truck to our Gallery Forum ...

Thanks,
John

Another thought
Does the caliper hit the (outer) rim itself or the wheel (inner) center section. If it’s hitting the rim offset can fix that, If it is hitting the center section the new rim would need a different shape center section that clears the caliper..

ie: a different offset won’t change where the center section rests on the hub and it’s relationship to the caliper like a spacer does, so the same rim center with a different offset won’t resolve that issue.
Chuck