how to tell if your spindles ahould have 1.00 or 1.25 rotors
 

how to tell if your spindles should have 1.00 or 1.25 rotors? 86 SWB has no rotors or calipers yet, thanks

Re: how to tell if your spindles ahould have 1.00 or 1.25 rotors
 

The 1" spindle bearing are a lot smaller, the diameter of the rear bearing surface on the 1.25" is 1.375'' the 1" is 1.245" according to the spindles I have laying around... My truck had one 1" shindle and rotor and one 1.25" spindle and rotor and it had 1" calipers so needless to say I had fun figuring everything out on my truck...

Re: how to tell if your spindles ahould have 1.00 or 1.25 rotors
 

The 1.25 inner bearing is an A5, the 1" rotor bearing is an A6 buy one or the other and see which fits or doesn't. Or measure the spindle with 6" calipers or micrometer.

Re: how to tell if your spindles ahould have 1.00 or 1.25 rotors
 

Another tip off is the 1.25" equipped trucks used 2 3/4" rear shoes while the light duty used 2" shoes.

Re: how to tell if your spindles ahould have 1.00 or 1.25 rotors
 

I've had multiple trucks apart in my driveway that were equipped w/1.25" front brakes (my old 74, Jonboys 79, & a co-workers 82). They didn't have the wider HD rear brakes.

From info I searched, it seemed those brakes were typically on burbs or ordered as an option.

Re: how to tell if your spindles ahould have 1.00 or 1.25 rotors
 

Was yours an 86? This is true for 1986

Re: how to tell if your spindles ahould have 1.00 or 1.25 rotors
 

My 85 swb 1/2 ton 2wd has the 2 3/4 wide shoes and 1.25 spindles/rotors

Re: how to tell if your spindles ahould have 1.00 or 1.25 rotors
 

Thanks, I don't have the original rear end nor drums but I just bought the smaller bearings and figured if it fits it drives