I’m tired of reading the one single decade old thread 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 mostly 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 me a link to where you can actually buy P30 spindles... you can’t find them, I've been looking online for many months!
I recently ran across these pics on a Facebook group. A guy who actually installed discs on the front of a big bolt and he did it in 2020...
I recently did get all the files form him but I'm not going to post them until he gives permission or he posts them himself. I've sent him the link to the big bolt forum.
time to move the hypothetical into action...
Last edited by Tony292; 11/17/20209:19 PM. Reason: new information
