Bootstrapbob

Thanks for the feedback Daan. Good to know I'm not missing springs between pads, I did notice they were magnetic and retraction of the pistons would pull the pads back from the disc but it just didn't seem like much. I did fit washers under the caliper lugs to give more clearance for the disc so I am happy this is something others do too. Time to clean the pistons and bleed them I think, hopefully that will fix it.

I have just picked up a used Hex fitted with Hope Tech3 brake levers, Hope Trial Zone calipers with red pads and Hope V2 discs but I am having some issues. Firstly, can anyone tell me whether the calipers should have a spring to push back the pads or do they rely on reduced oil pressure to pull them back when releasing the levers? Secondly I found when braking at above walking pace there was a brrrrr noise/vibration coming from the wheels. I could see that the outside diameter of the discs (on the lobes) had obviously been rubbing as the steel was shiny in places as though it had been filed. See the photo. When removing the calipers I could also see that the aluminium anodising had been warn away at the base of the slot in the caliper where the disc had been touching it. These are 180mm Hope discs fitted with Hope calipers on standard post mounts of an Inspired frame and fork with no spacers. According to the Hope site this is as it should be so why are the discs rubbing the calipers at the outer rim? I can fix the problem with a washer on both post mounts to pack the calipers off but this just seams wrong, has anyone else had this problem? Finally, it is also creating quite a challenge to centralise the discs in the calipers and partly why I asked the first question about a return spring as my pads do not appear to be retracting far when releasing the lever. I have wound out the bite point adjuster as far as it will go but I suspect there may be too much brake fluid in the system. My next option would be to clean and bleed them as per the Hope instructions to see if the pistons are sticking. This is my first trials bike and some of the answers may be "that's just what it is like on a trials bike" but I suspect the discs fouling the calipers is just wrong. Looking for some guidance from the forum members.

Finally found a bike so now the fun begins.

Thanks for the welcome. BMX skills are something you never forget, it's like riding a bike.😉 The thing I worry about is the years that have been accumulating. The reasoning for my late arrival at trials is partly that I want to improve my skill level but also get fitter at the same time.

Only just joined the forum and I am keen to build my own bike to start street trials. Spent many years doing similar stuff on BMXes before moving into MTB but looking to re-ignite those good old days when bikes were simpler. I have been watching YouTube trials content for quite some time and have read the TrashZen Trials book cover to cover a couple of times now. The time has finally come to get my own bike and see what I can still do from the BMX days and learn some more skills that I never mastered at the time.