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RISC Brake Evo 3

13528 Views 78 Replies 44 Participants Last post by  AgrAde, 
Kiwi-Brisa
Yeah you know it. :riaa:














































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D
very fuckin cool man!
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S
Peace said:
I reckon people would happily pay up to $400AUD for the disc/rim/frame mount... :dunno:
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Guess i would pay somthing like that easily :p
What do you say Kiwi Brisa? Make one for me and i will pay 400£!:luke:
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Kiwi-Brisa
skorp said:
Guess i would pay somthing like that easily :p
What do you say Kiwi Brisa? Make one for me and i will pay 400£!:luke:
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Id be keen to get a few out there aye. The problem is all frames are different, so to do a mount like i have on my dob would be impossible without some cad or the frame. What i could do is somthing similar to the caliper mount on the second version which mounted to the brake bosses?


Also what rim would you want it on? In NZ we have a supplier for echo rims but thats about it.
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anrothar
I would think you could use an assymetrical 'booster' to distribute the braking forces across the two 4-bolt mounts somehow, with the caliper only mounting on one side of course.

If it were in production, I could see, in USD, $150 for the rim with integrated mounts, $75 for the rotor(if you're getting more of them made, each would cost you less.), and maybe $75 for the mounts. So, @$300 USD.

Presumably your rim would last many times as long since you're not grinding it, and the rotor would last a really long time with the amount of surface area it has, so higher prices for those individual items wouldn't be unreasonable since they would last as long as 3+ of what most people use now.

My only worry would be weight.
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S
yeah, was thinking about somthing like Evo2
A booster, and just the mount over the Maggie mounts!

I ride a Koxx Karbon, with vertical dropouts.
Send me a Pm if your seriously interessed in selling one :)
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Crescent
I'd buy 1 also.

I think it would have to be designed using the 4 bolt Maggie mounts in order for it to be universal.
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Kiwi-Brisa
Sorry for the novel.

Realistically 400AU is really cheap for the time and cost of machining/overheads etc (400AU would probably be realistic if it was mass produced and all the faults had been ironed out). So at the moment its 75 to laser a disc, 100 for an echo tr rim, and it takes 1-2 days to mount it, rivets/spacers etc. Then to machine a calliper mount similar to the evo 2 would be 3 days machining plus some material or $400 cncd.

If the buyer understood that it was one of the first prototypes and there is the potential for initial tweaking, tuning/feedback and you need a bit of engineering knowledge (cant just be some joe blow idiot and expect it to assemble itself) then all good. All callipers are different and all frames are different so initially I would have to work with the guys that wanted one to make sure it was going to fit. Without having the actual frame though I couldn’t 100% guarantee it would fit without mods.

I would like to get a few out there but for now with the very limited spare time I have it would have to be a very low volume product. For me to justify the time spent I would have to say I could supply a system for $1000 NZD. For that price though the product would be beautiful of course, a hell of a lot nicer than the one I just built. CNCd mount (possibly even built-in custom calliper) and a much cleaner mounting system for the disc (no sharp edges where the disc mounts to the rim).
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D
That's a little higher than I would suggest but not outsided the realm of possibility. I would guess you could sell the custom one-offs for 850NZD. Production wise I would guess people would pay 550-650NZD. It wouldn't be hard to get production costs well below that.

The real problem I see is with demand. It's a niche product in a niche market and as such suffers from low demand. Don't expect to retire off this product.

It is a super cool gadget. I want one just from looking at it. I don't need one though.


Maybe you could put a patent on it and license it to some big company who has the manufacturing power and marketing reach to put this to use in other forms of cycling?

Good luck!
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Peace
Could you make it out of aluminium to reduce weight and cost? Or is it still just too weak/soft?

I know regular aluminium rotors sucked...
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Borg
Carbon rotor... with the size of it, and the reduced torsional forces due to the larger diameter.. it might work a lot better than that regular style carbon prototype rotor did.
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Kiwi-Brisa
Yeah actually my plan was to make a carbon one. I made a mock-up small disc to test how well it would work. Seemed all g. This stainless one was just to get mountings right and see if it would work etc. I work for an aerospace engineering company so i have access to a heap of high modulus prepreg carbon. Problem with carbon tho is you have to do make all your fixing points really strong/way bigger. Its pretty expensive too. Probably cost 200bux. Ali is a good plan, bit soft and not very springy for when you smack it.
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Borg
Awesome.

Do you maybe think the mounting points won't be as important since you have a lot more than 6 points to mount to?

I mean.. 10 points, taking far less stress than 6 mounted at the hub. I know the carbon rotors were having cracking issues where the bolts are?

Put an aluminum insert in the area around the bolt hole, problem solved?

I have a carbon fork that only has aluminum on the top layer of the drop outs, and where the crown race sits, it's pretty excellent as is.
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karla/kaarel
Massive 3,5 month bump!

I remember the first thread you made of the risc brake.. and now it came up with some people and i found this thread.. Its AWESOME! id love to see some new vid of you riding, i bet your skill is better then the first vid to so it would be cool to see you ride that thing!

Also that carbon rotor thing would be epic! wonder how much lighter it would be.. and also with cnc clamps and a all..
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sk8dad
Massive 11 month bump.

The idea has not escaped big bike designers.
http://prioritydesigns.com/cannondale.html

...though, you wonder why it's on a road bike and only just the rear...
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treewizzard
because roadies are stupid maybe?
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ahmed24
good br,


new evolution discbrake....
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JK
Its not just the rear look closer

RISC concept is cool! I would love to try that :D
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That_New_Guy
Kiwi-Brisa said:
Id be keen to get a few out there aye. The problem is all frames are different, so to do a mount like i have on my dob would be impossible without some cad or the frame. What i could do is somthing similar to the caliper mount on the second version which mounted to the brake bosses?

Also what rim would you want it on? In NZ we have a supplier for echo rims but thats about it.
Click to expand...
Would love to see this for real, considering I live in NZ... Lookw great though, wonder if it sticks out far enough to damage though? I'd defs try this with my rim haha :p
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literocola
Cannondale stole your idea for a new concept bike. You should sue their bitch asses.
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M
sk8dad said:
you wonder why it's on a road bike and only just the rear...
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treewizzard said:
because roadies are stupid maybe?
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It's not?
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