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PostPosted: Thu Oct 04, 2007 6:10 am 
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Location: Northern California, USA
I've been running tuned DA brakes but I need something lighter....please don't suggest Zero Gravity (I had 05 Ti and they suck) or any other single pivot brakes. Thanks.

Here's mine: Front Brake with Bontrager cork pads All bolts are Ti except for alum shoe bolts

Image

rear is about 8 grams lighter.

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Posted: Thu Oct 04, 2007 6:10 am 


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PostPosted: Thu Oct 04, 2007 6:12 am 
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PostPosted: Thu Oct 04, 2007 6:39 am 
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248 is freaking light for a pair of solid brakes. Out of curiousity how much did it cost to replace all bolts with ti?


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PostPosted: Thu Oct 04, 2007 7:37 am 
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I don't remember exactly, I've gotten my bolts from several places: tastynuts, racebolts, and some on ebay.

I think the tuning costs about 40 dollars (maybe more) for both brakes. I think they're still heavy for dual pivots so I am wondering if there are lighter alternatives. The main Ti bolt (specialty) was hard to find but it saves some serious weight, like 8 grams.

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PostPosted: Thu Oct 04, 2007 6:02 pm 
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Could you please list your changes? it sounds very interesting to me and please turn the brake pad on your front brake...


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PostPosted: Thu Oct 04, 2007 6:08 pm 
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FSA has just introduced a new K-Force brakset:
http://road.fullspeedahead.com/fly.aspx ... 19&pid=213
Claimed weight 140 grams per caliper.
So not really lighter than what you already have.


The new SRAM Red brakset has a claimed weight of 265 grams (for both calipers I guess):
http://www.willyoumaketheleap.com


The Campagnolo Record Skeleton brakeset has a claimed weight of 279 grams: http://www.campagnolo.com/groupsets.php?gid=1&cid=10

There's also the new Bontrager Speed Limit brakeset:
http://www.roadcyclinguk.com/news/artic ... 37/v/1/sp/
Quote:
A first for the Bontrager range are the Speed Limit brake calipers. Their PowerAmp linkage design promises ample stopping power and claims to have the same leverage ratio as a dual pivot design without the extra weight. At 270g they're certainly lighter than the benchmark Shimano DuraAce stoppers (around 314g) and cheaper too at £89.99. Supplied with SwissStop brake pads.

http://www.cyclingnews.com/tech.php?id= ... mit_brakes
Image


Last edited by 2 wheels on Thu Oct 04, 2007 6:20 pm, edited 1 time in total.

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PostPosted: Thu Oct 04, 2007 6:19 pm 
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Greyhound, don't you mean turn the brakepads on both the front and the rear? Looks like both are backwards to me. :shock:

Anyway, with the tweaks you've done Hans, I'd stick with what you have!!! At that weight, you just aren't going to find the same combination of lightweight and braking performance. They're a sweet set of brakes in that trim. Well done :thumbup:

If you do feel that you want to go even lighter (and you are only interested in dual-pivot) you might want to look at BC2A: http://www.bc2adesign.com/index.html

They have 2 models, with the Ti version coming in at a claimed 224g for the set (claimed on the website as: "The lightest Dual Pivot Calipers in the World"). They also have an Aluminum model that is apparently 229g. Here's a pic of he Ti version:


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BC2A Ti2.jpg
BC2A Ti2.jpg [ 113.07 KiB | Viewed 2526 times ]
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PostPosted: Thu Oct 04, 2007 6:34 pm 
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That's both of the bc2a, but I have no idea if they are on the market.

That said, dismissing the new Negative G brakes (or a whole class) might not be the best... But then asking for the lightest but wanting great performance in brakes (or lots of things) may not go hand in hand...

M5 have a thing or two to say about stopping power and weight for instance...

Image




Also, Token have a set of brakes this year (photo shortly).

And TRP carbon work very well...


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PostPosted: Thu Oct 04, 2007 6:40 pm 
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On this 595 the BC2A Ti2 brakes (in final production form) actually don't look that bad. Here's where you can see the full-sized original: http://www.bc2adesign.com/files/Al1_Loo ... _sharp.JPG


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BC2A Ti2's on a Look 595 - in Black!.jpg
BC2A Ti2's on a Look 595 - in Black!.jpg [ 126.01 KiB | Viewed 2590 times ]
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PostPosted: Thu Oct 04, 2007 7:21 pm 
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Unless you ride in reverse a lot you could get rid of those little bolts in the pad holders too and save a couple more grams.

Without giving up your bias against single pivots you are better off staying with what you have.


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PostPosted: Thu Oct 04, 2007 9:27 pm 
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+1 on the M5. Best perfoming brakes IMO even if they are ugly. Tire clearance is an issue if your running big tires (25's and up)

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PostPosted: Thu Oct 04, 2007 9:47 pm 
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I have some of the new Bontrager Speedlimits... they are nicely made and stop really well, but not as well as a set of standard dual pivots, close, but maybe 90-95% as well. For the price they are a good set of brakes.

I am surprised no one has mentioned SRAM Rival brakes.... they stop really well and weight is under 300g for the set... very cheap too. Its one of the reasons Rival is such a light group, brakes and levers lighter than DA....

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PostPosted: Thu Oct 04, 2007 10:13 pm 
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i changed d ace for frm brakes, and went back to dura ace
stay with them and change wheels
truly, they perform great, also compared to weight

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PostPosted: Thu Oct 04, 2007 11:42 pm 
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These are claimed to be 270 gms for $169:

http://sampsonsports.com/brakes.php


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 Post subject: TRP R920 128grams ea
PostPosted: Fri Oct 05, 2007 5:54 am 
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Sorry I haven't introduced myself earlier. I'm the marketing manager for TRP. I just wanted to point out that the TRP R920's only weigh 128 per caliper.


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 Post subject: TRP R920 128grams ea
Posted: Fri Oct 05, 2007 5:54 am 


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