Coker Brake

More.

The advantages of a Magua over cable operated brakes are:

1 That it's smoother (better modulated).
2 You can set it as a drag brake 😎 (if you have the newer handles)
and not have to have your hand on the lever.
3 There are no arms that move or stick out.
4 You don’t need to adjust it after you set it up. 😄

Cost:

The V-brake mount cost $29USD new at the LBS and the Magura $30 :eek: on
eBay.

Mounting:

If you look closely at the first and third pictures - Marvin the Coker
Brake and Marvin the Coker Brake right side - you can see the mounting
bolt for the V-brake mount at the top of the adapter, that's the only
mount needed as when the brake is being used it is held against the
frame (mount brakes on the BACK of the frame so they push on the frame
instead of pulling on the mounting assembly) and when it's not being
used there are no forces on it. The mounting bolt goes through the
frame of Marvin.

The V-brake mount also came with hose clamps that I took one look at and
laughed at, although if you didn't want to drill a hole in the frame
they’d work. I’m glad I didn’t use them because the wheel is not
centered in the frame, and the clamps would center the brakes.

The handle and master cylinder are temporarily mounted on one side of a
GB handle - it's temporary because the Magura itself is broken (one half
of the thing is broken off, that's why it was cheap - $30 for both front
and rear brakes on eBay) and because I didn't have any of the mounts
I've seen in other threads . . . Yet.

--
brian.slater - Nellfurtiti, the Wonder Cat

Brian C. Slater
AKA: Snoopy

Ok, I am now officially in my normal state of -advanced- confusion.
Don't try to confuse me, it won't make any difference.

"To not decide is to decide" - undecided
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Brian - sounds great. Can you post a photo showing the "newer" handle
that allows use as a drag brake? I'm very interested. What model brake
are you using? If at all possible can you post some photos showing the
mounts and everything on your Coker?

Thanks,
Nathan

--
nathan - BIG rides: Muni & Coker
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nathan said:

*Can you post a photo showing the "newer" handle that allows use as a
drag brake? I'm very interested. What model brake are you using? If at
all possible can you post some photos showing the mounts and
everything on your Coker?*

HS 33 is the model that can be set as a drag brake
[image: http://www.magura.com/english/pop/hs33_1_%202002_pop.jpg]
The red knob can be adjusted so that the brakes are dragging with no
hands on the brake.

I have HS 11 - no red knob.🙁

My pictures are 'here' (http://gallery.unicyclist.com/Snoopys-Portfolio)

--
brian.slater - Nellfurtiti, the Wonder Cat

Brian C. Slater
AKA: Snoopy

Ok, I am now officially in my normal state of -advanced- confusion.
Don't try to confuse me, it won't make any difference.

"To not decide is to decide" - undecided
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I've up-dated the brake on Marvin, the Coker, because U-Turn (Dave
Stockton) has created, just for me, a very, very nice wheel. You need
an Airfoil rim if you have a brake on a Coker, the standard rim has
bumpy welds. Now it's got a beautiful HS 33 -*_red_*- Magura, which
matches the -*_red_*- seat.

Note that the brake is mounted on the rear of the frame, many posts
about brakes mention hitting the brake and/or mount with legs, is this
why I don't have this problem? Anyway, always mount your brake on the
rear of the frame; it's structurally better that way

I've also added some more lights (I ride to work between 11 PM and
midnight) including a yellow Xenon strobe, note that red -flashing-
lights are not legal in most places.

My pictures are 'here'
(http://gallery.unicyclist.com/Snoopys-Portfolio), the ones with the red
brakes are the new ones, but the mount is still the same.

Did I mention that the new brakes are -*_RED_*-? :eek:😄

--
brian.slater - Nellfurtiti, the Wonder Cat

Brian C. Slater
AKA: Snoopy

Ok, I am now officially in my normal state of -advanced- confusion.
Don't try to confuse me, it won't make any difference.

"To not decide is to decide" - undecided
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Nice going, Brian!

Have you tried using your HS-33 as a drag brake? I found a while ago
that it took quite a few turns to engage it, many more than I thought
would be acceptable for a good drag brake.

I need to revisit that impression.

I have done some investigation into modifying the handle to improve the
engagement time but haven't yet developed anything that is substantially
better.

--
U-Turn - As long as my feet keep movin'...

Weep in the dojo... laugh on the battlefield.
'LiveWire Unicycles' (http://www.livewireunicycles.com)
'Strongest Coker Wheel in the World'
(http://www.unicyclist.com/gallery/albup39)
'29er Tire Study' (http://u-turn.unicyclist.com/29erTireStudy/)
'New York Unicycle Club' (http://www.newyorkunicycle.com)
-- Dave Stockton
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Dave, how about taking a bolt with a coarser threading than the stock
lever bolt onto which the red plastic knob is set (which bolt controls
the plunger depth in the lever), grinding a 4-sided area to stick out
of the lever into which the red knob can be pressed & glued? That way
the plunger acts in the same manner only it takes fewer turns to
activate it. Yes it would require machining of a bolt and the part
between the bolt and the plunger inside the lever, but it does change
the rate of the knob actuation.

--
unisk8r
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unisk8r said:

Dave, how about taking a bolt with a coarser threading than the stock
lever bolt onto which the red plastic knob is set (which bolt controls
the plunger depth in the lever), grinding a 4-sided area to stick out
of the lever into which the red knob can be pressed & glued? That way
the plunger acts in the same manner only it takes fewer turns to
activate it. Yes it would require machining of a bolt and the part
between the bolt and the plunger inside the lever, but it does change
the rate of the knob actuation.

Hey Pete, I actually did that about 3 years ago, but two things: one, I
had to develop a new insert piece as well, and real life intervened,
and two, the geometry went away with the 2005s. I used a larger knob
as well, but it proved to be a little bit of a finger trap. All in all,
it was a little clumsy.

Unless you meant the 2005 design?

--
U-Turn

Weep in the dojo... laugh on the battlefield.
'LiveWire Unicycles' (http://www.livewireunicycles.com)
'Strongest Coker Wheel in the World'
(http://www.unicyclist.com/gallery/albup39)
'29er Tire Study' (http://u-turn.unicyclist.com/29erTireStudy/)
'New York Unicycle Club' (http://www.newyorkunicycle.com)
-- Dave Stockton
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