grinding calibers

[rob75]

I need to grind my front 8 lug calibers to fit my 15" rims. how much clearance do i need between the rim and caliber? 1/8" 1/4" 3/8" 1/2" ?? how much do you think they can expand when they get hot?

 

[Jason4x4]

When I did mine, I just ground until the wheel didn't rub, then took a flap disk to it to smooth it out.

 

[cybrfire]

1/8" clearance is great plenty.

 

[Avery4jc]

There is an article on this on the front page...

When I ground my calipers down I did the same thing as Jason... just ground, checked, ground, checked, etc. then after they fit I did one more pass to be safe...

It'll also depend on the back spacing of the wheel you plan on using as to how much you have to grind...

 

[shaun89]

if u have the tire off the rim, ull be a lot happier, just grind, and check, be sure to snug at least 2 lugs down each time u check. cause even though u can press it on even, as i found out, it changes when u apply a little pressure from lug nuts. and i did exactly what jason did. theres probably about a 1/16" clearance on mine and i have never heard it hit. actually i think it has a tiny tiny tiny bit once in a blue moon. but not enough that it could ever affect anything.
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[Jason4x4]

also, make sure you grind it with new pads, if the pads are worn, when you put new pads on it, you will need to grind more.

 

[rob75]

thanks for the info Ive already ground them and can pass a coat hanger between the rim and the caliber I wasn't sure if that would be enough . but the pads are worn so i will be replacing them this weekend thank for that tip.
thank you for all the input you guys are grate.