I’m tired of reading decades old threads about what big bolt disc brakes may or may not work, and to make it work you have to either be or know a machinist. It’s basically all speculation based on decades old research. Many of these parts are obsolete and cannot be easily found.... and even if you do happen to acquire the rare old parts, you’ll still have to find a rare 80 year old machinist who can assemble them for you. If you doubt me then go ahead and show me a link to someone who sells P30 disc brake spindles that are machined to fit a big bolt. Hell, just show. E a link to where you can actually buy P30 spindles... you can’t do it!
I recently ran across these pics on a Facebook group. A guy who isn’t all talk and no action as most of these decades old threads are, here’s a man who actually installed discs on the front of a big bolt and he did it in 2020... far different from “he speculated about it in 2005”.... with parts not available since 1995...
But of course when I ask him how and beg for the details, I get nothing.
But I’m going to keep on bugging him onFB. Because as the pics show he does it with wildwood parts that are still available and no machining or spindles or spindle conversions necessary.
I’ve seen nothing but speculation regarding disc brakes on a big bolt since I’ve been here... Nobody who had actually done so... just a bunch of hypothetical stuff.
Hey Tony,
You do realize those are custom machined rotor adapter plates right? And the caliper mounting brackets. Those are custom also. Now it does look like the caliper and rotor are off the custom shelf parts, so that's cool.
And some of these big bolts are in fact 5/10 lug for ton and a half AND two ton. I have trucks here, all 5/10 lug some 11/2 and some 2 ton all Chevy, from 1940 to 1951.
I don't have pictures but I am in the process of doing 4 wheel discs on my 1 1/2 ton truck. Custom parts from a machinist on this forum for the front axle and I am swapping in a 2 ton Dana 70HD rear axle from a motor home. That's a stock axle with disc brakes with the 5/10 lug pattern. But... Since it's later model it has larger OD wheel pilots so I am having a local machinist turn down the hubs to fit my old wheels and he is also making hub centric wheel spacers because I need a slightly wider axle for my application.
