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FROM UNishark:
Is that a mountainuni rig?
See thread: Mountainuni Disc Brakes Have Arrived!
Not a Mountainuni Rig but the concept is similar. Our Rotor attaches to the crank, and UDC Proto is using their dev hub which rotor attaches to. If you’re building a new wheel with hub, Can’t go wrong with the UDC system. It uses a lower bearing cap holder for the caliper.
New Disc Brake?
I’ve had one on mine for four years! You guy’s are playing catch up!
I asked Josh about using that hub for muni and he said that it was not strong enough for anything that involved drops, so XC might be okay, then again you take your chances… He told me to wait.
Every so often I get a chance to talk about gear with Josh. If you’ve ever spoken with Josh, he’s a very animated guy with a whole lot of interest and energy for the sport. Sometimes he says things, then tells me: “don’t repeat that on the forum”, so I gotta do what I’m told or he won’t talk to me 
Spring 2011 would be nice, but this is a big deal for UDC as the frame and hub are having to be redesigned, so patience is a virtue…
I’m just hoping that the 26" frame stays wide enough for a Larry
Now about that 3" 29er tire…
Yeah but you have suspension too 
so is nimbus or udc gonna be coming out with a Muni like the green one? or does anyone know. looking to get a new one just dont know if i should wait…
nice knock off…
It’s a prototype bearing holder disk break mount shown off on our Sunday ride around Stockton on Tees. Whether or not this is going to make it into production any time soon (by nimbus or UDC or similar) is another matter entirely although I think most of the comments I heard about it were positive.
I did have a go myself and although the seat was very low (which made it kinda hard to tell what it was like), I can say that the braking felt very smooth to a brake-noob such as myself. The Maguras I also tried that day seemed much more difficult to use correctly, they were a bit more abrupt and harder to control perhaps.
And for Roger’s sweepstake, I’d say that there is only one ‘new’ part on that. As I understand it, the hub, disk and brake are already used on a different unicycle but the bearing holder mount is a new part.
You really should look harder… The hub was not the same as fitted to the 36", neither was the brake. There was more to that unicycle than the hub.
Roger
Any news on it then? 
it looks a lot like the mountainuni bearing cap caliper mount… does UDC intend to market it? what will Mountain uni’s cut be?
kb1jki,
Is the invention patented? Is it a novel enough idea to be patented?
I only ask, because many simple ideas are obvious to a skilled practitioner and as a result are not patentable. I believe that even if an invention is patentable, your options are limited after public disclosure, such as posting a picture of the devise on a public forum.
The clamp on brake mount looks like a nice fix for old frames, but I am sure the next generation of frames will have disk brake mounts welded on.
Scott
How do you replace a broken spoke with the rotor in the way?
When do you guys think they will come out with this? And I bet it will be pretty expensive! I’d love to have one that’s for sure! Could be a lot of fun at the coast of some of the softer trails and some sand sections.
Well just like on Motorcycle’s and MTB’s you just unbolt the disc then replace your spoke easy.
If you must have a (small disc) it’s best to have it mounted inside of the frame like on MTB and Motorcycles. Having a disc mounted on your crank is 
not very good.
The BIG THING is a bolt on disc is only a small disc for the best braking a BIG DISC is best the biggist is the RIM or just bolted to the rim like some US made Motorcycles.
K.I.S.S. Just use the rim as at the end of the day its always best
Stiff Unicycle frame is all thats needed
Pete G…
i am gonna buy it soon 
Personally I’m perfectly happy with rim brakes (on unicycles and bicycles), but…
The main advantage of a disc brake over a rim brake is that the disc (material and design) can be optimised for braking performance rather than being a compromise between rim strength/lightness and braking performance. Also, it’s a lot less hassle to change a disc when it wears out than the rim. Both these points are obviously much more relevant to bikes than to unicycles.
The small diameter of the disc makes for less strong braking (than a rim-sized disc of similar design), but that’s not really a concern with a unicycle. What we want most of all is smoothness and modulation, and a disc would be less affected by the things that mess up those qualities on a rim brake (i.e. frame and wheel flex and dirty rims).
Disc brakes have disadvantages as well though - narrower hub flange spacing (obviously doesn’t apply to the the crank-mounted design) and inability to ride if the disc gets damaged (without disassembling the brake). And they seem to be very prone to squeeling on bikes, but I’ve not used them myself so I don’t know if it’s just poor setup and maintenance.
Rob
When we were out at Dalby Forrest a few weeks ago in the rain and the bikes had a LOT of problems with their disc brakes. Due to the gritty mud getting on the discs they were wearing down the brake pads so rapidly they became inoperable within minutes.
We had to stop several times to help the bikes fix their brakes. It was rather a surprise to find that unlike motorbike or car callipers (or Nimbus) the Shimano ones did not self adjust! You HAD to manually adjust them for ware… really poor design… especially in an area like the North Yorks Moors. My guess is some of the noise from disc brakes may be that they are badly adjusted.
Roger
Rim brakes are okay, but anyone who uses them for muni has to admit that they are a pain to adjust and keep adjusted, they rub as the wheel moves side to wide, and they get leaks. The rubbing and difficulty with staying centered are my biggest complaints, next would be having to deflate the tire or remove a caliper to remove the wheel.
A disc brake mounted on the rim/frame would be better in all ways including being easier to adjust, having a choice of cable or hydraulic operation, easier wheel on and off, less snow and mud gathering, more protected from rock hits.
I worry some about the narrower hub, but I’m sure it’s not a big deal in terms of total wheel strength. It’s also be nice to have a choice of disc size so for a bigger wheel like the LM/Larry combo, I could get a 180-200mm and get tons of power, whereas on a 20er I could probably get by on a 160mm.