rec.sport.unicycling · Public discussion

Re: Disk Brake on a (QU-ax) 36er?

Evan Byrne · 2007-06-05T19:17:02+00:00

The new Qu-ax 36 does not have a breaking surface on the rim. Would anybody with a mechanical mind please comment on the possibility of adding a disk break? Showard added a disk brake to his coker (see 'this thread' (http://tinyurl.com/36b7ov)). He did some seriouis modifications though (like building the frame!). I don't have the tools or skill to do that. So, would a bike shop be able to fit one without too much hassle? Many thanks! There is NO WAY any normal bikeshop will be able to do that much modding to a unicycle. Most of them don't even know how to do matinence on a unicycle let alone put a disc brake on. It requres a special hub and frame. Plus a brake post and the brake itself. If you had lots of money you could have a machinist make a hub with rotor mounts and have someone weld on some mounts onto a frame. -- Evan Byrne ------------------------------------------------------------------------ Evan Byrne's Profile: http://www.unicyclist.com/profile/9367 View this thread: http://www.unicyclist.com/thread/61461 Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- ** SPEED ** RETENTION ** COMPLETION ** ANONYMITY ** ---------------------------------------------------------- http://www.usenet.com

Started by Evan Byrne · 5 June 2007 · Last activity 6 June 2007 · 12 posts · 362 views

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01 / Original postRe: Disk Brake on a (QU-ax) 36er?Evan Byrne · 5 Jun 2007 02 / This pagePosts 1–12Page 1 of 1 · chronological order 03 / Latest replyPost #12unisk8r · 6 Jun 2007

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Original section: rec.sport.unicycling
Published: 5 June 2007
Last activity: 6 June 2007
Original author: Evan Byrne
Posts: 12
Discussion status: Public discussion
Total views: 362
Views / 30 days: 0
Topics: Disc brakes Electronic shifting Rim brakes

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Original post
Evan Byrne
Archived post

5 June 2007, 19:17 UTC #1

WOFT said:
The new Qu-ax 36 does not have a breaking surface on the rim. Would
anybody with a mechanical mind please comment on the possibility of
adding a disk break?
Showard added a disk brake to his coker (see 'this thread'
(http://tinyurl.com/36b7ov)). He did some seriouis modifications though
(like building the frame!). I don't have the tools or skill to do
that.
So, would a bike shop be able to fit one without too much hassle?
Many thanks!
There is NO WAY any normal bikeshop will be able to do that much
modding to a unicycle. Most of them don't even know how to do matinence
on a unicycle let alone put a disc brake on. It requres a special hub
and frame. Plus a brake post and the brake itself.
If you had lots of money you could have a machinist make a hub with
rotor mounts and have someone weld on some mounts onto a frame.
--
Evan Byrne
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kington99
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5 June 2007, 19:22 UTC #2

What he said, such a project would be a serious undertaking for a
experienced machinist, a bike shop wouldnt touch it.
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kington99
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WOFT
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5 June 2007, 19:24 UTC #3

Damn. I expected at the most they would weld a mount onto the frame, and
screw the disk onto the hub:o .
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Loosemoose
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5 June 2007, 19:57 UTC #4

I'm not sure (since I've not seen the Quax hub) if it would be possible,
but I think it might be feasible to modify a Quax hub to take a bolt on
rotor, by removing a bearing spacer and bolting/welding on an adapter
plate between one flange and the bearing that could take the bolt-on
rotor. I don't know if there would be space without looking at how disc
brakes work, how much room they need and how much room a Quax hub
leaves. I would also assume that the mount for the frame is readily
available to weld on after-market.
So if it could work, a fairly experienced machine shop (provided with
good drawings and a detailed description of what needs doing) should be
able to make the modifications for a reasonable sum of money. I
certainly know of several places here in the UK that would be happy to
do this kind of small machining. I would try it, except I don't have
the time or money.
Loose
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Evan Byrne
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5 June 2007, 20:55 UTC #5

Now that i think about it, It would be possible to make a bearing spacer
with rotor mounts that slides onto the splines of a hub. Only certain
hubs have full length splines though. Kh 05 and profile would worj.
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unisk8r
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6 June 2007, 01:55 UTC #6

It can require a custom hub and some frame welding, but it's do-able.
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MuniAddict
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6 June 2007, 01:57 UTC #7

unisk8r said:
It can require a custom hub and some frame welding, but it's do-able.
How about a full view of that....whatever it is it looks cool!
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saam
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6 June 2007, 03:08 UTC #8

MuniAddict said:
How about a full view of that....whatever it is it looks cool!
'Clickety click' (http://tinyurl.com/lwe2a) 🙂
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saam
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"Crippled but still keen, I salute you!"

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lowlight
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6 June 2007, 11:54 UTC #9

Disc brakes sound a great idea. I've had a hope mini on my mountain bike
for a few years and found it provides much more consistent and reliable
braking than rim brakes. I think it would be great to see mass produced
disc brake compatible components for unicycles in the future.
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DustinSchaap
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6 June 2007, 12:20 UTC #10

Like I have mentioned in another thread, the Qu-ax rims might fit a
calliper type of brake, more info about that soon (I hope) which is
cool, because they're cheaper and easier to maintain.
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unisk8r
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6 June 2007, 17:58 UTC #11

+1, Dustin. It took alot of work to make mine. For a standard
direct-drive hub, there is a product made by First Principles in Canada
that bolts to the flange, and provides both the disc rotor mount and
the spoke holes:
http://www.firstprinciples.ca/products.html
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unisk8r
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6 June 2007, 18:00 UTC #12

Oh yeah, welding the disc caliper mounts to the frame is unavoidable.
And the mount measurements will depend on the brand of brake.
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