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PostPosted: Sat Jun 08, 2013 7:34 am 
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Location: Australia
hi all,

Can't for the life of me get my Gravitas SL's to work with my 303 firecrest clinchers.
Can anyone with this setup tell me what Gravitas combo they're running?

AFAIK the Gravitas SL's come standard with super-low brakeholders and the extra-wide cam.

thanks

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Last edited by pawnii on Sun Aug 18, 2013 11:15 am, edited 1 time in total.

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PostPosted: Sat Jun 08, 2013 8:39 am 
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I had gsl's and got a set of smart sys wheels solution was to get ee brakes, best thing I could have done :mrgreen:

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Posted: Sat Jun 08, 2013 8:39 am 


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PostPosted: Sat Jun 08, 2013 11:45 am 
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i hear what your saying but i'm going to give the Gravitas a red hot go before switching. Besides ee is ugly.

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PostPosted: Sat Jun 08, 2013 1:12 pm 
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Yea the looks kept me at bay for a long time.. Once you get a pair though you'll fall in love.. They are attractive in an engineering fashion.. They work very well and are quite demure in real life :mrgreen:

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PostPosted: Sat Jun 08, 2013 5:10 pm 
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Ted contacted me since he is having a problem logging on to the site but I guess someone contacted him regarding your issue. Ted asked me to post this for him.


From Ted Ciamillo:


If the Gravitas are running the wide cam and the superlow profile padholders and there is still not enough clearance, they can be sent in for a finger modification at no charge. The finger modification became a standard operation over a year ago but this set may be older. While the set is here I can confirm that there is a minimum clearance of 1.5mm per side of the rim.

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PostPosted: Sun Jun 09, 2013 6:26 am 
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I have 404FC's with GSL's, my experience leads to this setup tip:

-remove brakes

-install any other brake on the planet besides Ciamillo's

-the end.

Trust me, you won't want to send them in. I've been waiting 5 months just to receive the pad holder shims. I'll be going EE or Aerolinks......err, I mean they are great, I'll guess I'll part with them if you want to buy them.....


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PostPosted: Sun Jun 09, 2013 6:32 am 
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Juanmoretime wrote:
Ted contacted me since he is having a problem logging on to the site but I guess someone contacted him regarding your issue. Ted asked me to post this for him.


From Ted Ciamillo:


If the Gravitas are running the wide cam and the superlow profile padholders and there is still not enough clearance, they can be sent in for a finger modification at no charge. The finger modification became a standard operation over a year ago but this set may be older. While the set is here I can confirm that there is a minimum clearance of 1.5mm per side of the rim.



i don't have a problem with clearance. I have a problem with them bottoming out....and absolutely no power when i pull the brake levers.

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PostPosted: Sun Jun 09, 2013 6:42 am 
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SLCBrandon wrote:
I have 404FC's with GSL's, my experience leads to this setup tip:

-remove brakes

-install any other brake on the planet besides Ciamillo's

-the end.

Trust me, you won't want to send them in. I've been waiting 5 months just to receive the pad holder shims. I'll be going EE or Aerolinks......err, I mean they are great, I'll guess I'll part with them if you want to buy them.....


At this point in time I'm going to persist and see if i can tune these brakes to suit my setup.

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PostPosted: Sun Jun 09, 2013 7:30 am 
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...and why doesn't Ted have his contact details on his website?

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PostPosted: Sun Jun 09, 2013 10:25 am 
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Location: Gien, France
The solution for the 303 is right:
-Please measure the clearance with superlow profile and precise your brake pads.

I have made a chart in French so that customers can check the clearance and choose the real profile that they need.
Image
Topic is here: http://veloptimal.com/forum/viewtopic.p ... &start=180

As Ted is currently very busy on crank production, I suggest to check the stock available among the different retailers or distributors worldwide.
Sometimes, they have more stock and choice than Ted himself.

If you are from North America, Ted should be most of the time the best solution.
If you are out of North America, you should find distributors in your continent...
I personally supply the entire Europe with my website http://www.velo-perso.com" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;. I mean that I have a large choice of small parts in stock, and you cannot order what's not in stock.
I also supply after sales service kits for those who want to upgrade their brakes with the 2011 spring or just change springnuts, new padholders ot Titanium bolts for example.

The supply chain is being modified this year due to the arrival of the crank. Ted an I will have an appointment in June and we'll communicate on the best way for customers to get supplied in terms of small parts and services.

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Last edited by lewolive on Sun Jun 09, 2013 11:51 am, edited 3 times in total.

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PostPosted: Sun Jun 09, 2013 10:26 am 
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pawnii wrote:
...and why doesn't Ted have his contact details on his website?


:noidea:

http://caw-designs.com/?page_id=268

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PostPosted: Sun Jun 09, 2013 11:07 am 
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You might get em working but they won't work very well, problem is the wide rims are out side of the band of good lever travel to pressure ratio, they can be made to work but the useful power zone isn't transferable. The whole range of brakes is in dire need of modernising to keep up with present rim tech..

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PostPosted: Sun Jun 09, 2013 6:04 pm 
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Image

Image

Image

I'm using Enve's Pad and Zipp's (Swisstop Platinum Pro) pads with low profile pad holders and medium washers.

I had this problem on the GSL's once and replaced the pads, washers and pad holders (with Gravitas parts) which worked on a set of Enve 3.4's

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PostPosted: Mon Jun 10, 2013 4:11 am 
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Location: Australia
are they the Gravitas SL's?
Are you using the 'wide cam'?

The Gravitas SL 2013 model comes standard with the 'wide cam' installed and 'super-low pad holder'.
Nothing else came in the box...not even a single bit of instruction.

Correct me if I'm wrong please anyone...but you have to buy these brakes, install them and take them for a test spin.
If the setup is not suitable for your bike, you have to purchase more parts, install them, test spin again....
so you basically have to keep repeating this until you find the suitable setup?
all without any help from the manufacturer and rely on info on forums :P

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Posted: Mon Jun 10, 2013 4:11 am 


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PostPosted: Tue Jun 11, 2013 1:55 am 
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Posted for Ted:

Hello Pawnii,

Image

Sorry for the problems with your setup and for the lack of information while we finish the new proper website.

All 2013 Ciamillo brakes come with all the hardware necessary to accommodate any rim on the market. You should have received the above illustration in the box with your brakes. There should be three types of spherical washers included with the Gravitas brakeset; one set of single sided sphericals, a thick set of double-sided sphericals, and a thin set of double-sided sphericals. Please refer to the above illustration to determine your setup.

Regarding my brakes and wide rims... they work perfectly when setup properly. I licensed the patented cam mechanism to SRAM which validated the superior design over dual pivot. The system allows for a more compact setup as well. However, there were some challenges to the design when presented with the wider rims of late. The solution is in the padholder configuration. It is very easy to get my brakes optimized using the hardware (sphericals). It simply requires selecting the configuration where the cam rises to less than half the total stroke as it makes contact with the rim. There are four rim width configurations possible:

1 - no double sided sphericals : widest rims
2 - thin double side sphericals : wide rims
3 - thick double sided sphericals : standard rims
4 - thick and thin nested together : narrow rims

Issues with brake performance and power are usually a result of improper setup. If the barrel adjuster is used to close the gap on narrow rims (with new pads installed), it uses up stroke to do so. When this happens there could be a condition where half the stroke (or more) is used up by the barrel adjuster. When the lever is then pulled in this situation, more stroke is used up by closing the gap, and the rest may be used up by compression of the pads, flex, and cable stretch... with no stroke left the cam now hits the underside of the barrel adjuster preventing any further clamping of the rim or addition braking force being applied. The solution: move your barrel adjuster back down so the stroke of the cam rests at the most open position for the caliper; close the gap to no more than 2mm per side using the proper combination of double sided sphericals. Done. When the lever is pulled now, approximately 20 to 30% of the stroke will be used to close the gap. Contact will then be made with 70% of the stoke of the cam still available. This is the amount of stroke needed for full application of force and pad life. The barrel adjuster may now be used to keep the gap maintained but when the cam starts hitting the bottom side of the barrel adjuster, it's time to change the pads.

The above condition is the most common issue with my system next to housing length. My brakes drifting off center or having difficulty centering is 100% of the time due to improper housing length. The housing should not push down or pull up on the caliper as this will bias the balanced spring.

In addition to getting your torques on your bolts right, there are really only two unique but important things to remember regarding setup of Ciamillo brakes:

1 - Using the double-sided sphericals, create a gap of around 1.5 to 2 mm per side of the rim without the use of the barrel adjuster.
2 - Cut your housing to a neutral length that does not push down or pull up on the caliper.

If these simple steps are taken, the Gravitas road calipers are the most powerful calipers on the market.
Please contact me directly at 770-364-7933 or tciamillo@gmail.com

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-For my next trick I will set myself on fire!
-This board and the world in general would be a much nicer place if everyone could just take themselves a little less seriously.
-Sticky Fingers John Rockefeller
-First one over the cliff wins!


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