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 Post subject: BTP Shifter Clamps
PostPosted: Wed Jul 30, 2008 3:30 am 
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Joined: Sun May 25, 2008 3:58 pm
Posts: 47
Location: scottsdale, az
Would like to see some pictures of these clamps "in action" on the bike.

Post them up please! :D


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 Post subject: shifter clamps
PostPosted: Wed Jul 30, 2008 10:17 am 
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Joined: Tue Mar 11, 2008 2:55 pm
Posts: 1318
Location: UK
Me too. Are they as crap as their front mech clamps?

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 Post subject: shifter clamps
Posted: Wed Jul 30, 2008 10:17 am 


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 Post subject:
PostPosted: Wed Jul 30, 2008 12:59 pm 
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Joined: Sat Apr 22, 2006 12:38 am
Posts: 1741
Location: Dutchess County, NY
I've had mine on for 1000-2000 miles now w/ no problems. I'd take a picture, but I'm not unraveling my handlebar tape. BTW this is w/ sram red shifters.


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 Post subject:
PostPosted: Wed Jul 30, 2008 1:09 pm 
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Joined: Thu Mar 23, 2006 2:52 pm
Posts: 2327
Location: The Alps
No pictures as they are hidden.

I've had a useless BTP seatpost clamps. It broke at 50% of recommended torque, I posted it back and customer service was zero. So careful.

But the clamps are still working fine.


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 Post subject:
PostPosted: Wed Jul 30, 2008 1:12 pm 
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Joined: Thu Jul 28, 2005 8:15 pm
Posts: 354
Location: Wales, UK
2 years, 7000 km, no trouble. Shaved 22g off my DA9 STI.


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 Post subject:
PostPosted: Wed Jul 30, 2008 1:18 pm 
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Joined: Thu Sep 15, 2005 10:19 am
Posts: 784
Location: Greece
I would never buy them.
The results of a failure would be catastrophic (unlike a FD clamp).
I know neither me nor the clock can tell a 22gr difference so I decide to play it safe with certain parts on the bike e.g. brakes


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 Post subject:
PostPosted: Wed Jul 30, 2008 1:18 pm 
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Joined: Sat Apr 22, 2006 12:38 am
Posts: 1741
Location: Dutchess County, NY
Danton wrote:
No pictures as they are hidden.

I've had a useless BTP seatpost clamps. It broke at 50% of recommended torque, I posted it back and customer service was zero. So careful.

But the clamps are still working fine.


I have a btp seatpost clamp as well- good thing I got it for next to nothing. The bolt broke (using a torque wrench) which was easliy replaceable, but the clamp does not hold well (even w/ tacx paste).

I can say the shifter clamps are working quite well (saved 20g on the weight of my red shifters) and I have one of their 13g bottle cages which has been in use over 2 years now w/ zero issues.

I had the front der. clamp on my old frame (new one is a braze on) and it worked, but was difficult to get set up.


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 Post subject:
PostPosted: Wed Jul 30, 2008 2:12 pm 
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Joined: Sat Jun 19, 2004 11:08 am
Posts: 6291
Location: Urbana, Illinois
Like everyone else said, they are under my bar tape. I've been on mine for over three years and about 20,000 miles and still going strong.

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 Post subject:
PostPosted: Wed Jul 30, 2008 2:59 pm 
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Joined: Fri Feb 17, 2006 6:22 am
Posts: 1273
Location: Zion
Same here. Using it with no issues.

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 Post subject:
PostPosted: Wed Jul 30, 2008 3:22 pm 
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Joined: Mon Apr 28, 2008 2:04 pm
Posts: 254
Location: Germany
My digi scale said 421g with my Da 7800 shifters.

With BTP installed, it's 397g - 24g saved, no issues whatsoever.


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 Post subject:
PostPosted: Wed Jul 30, 2008 5:01 pm 
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Joined: Sat Apr 22, 2006 12:38 am
Posts: 1741
Location: Dutchess County, NY
Taz wrote:
I would never buy them.
The results of a failure would be catastrophic (unlike a FD clamp).
I know neither me nor the clock can tell a 22gr difference so I decide to play it safe with certain parts on the bike e.g. brakes


I guess we all have our risk tolerance.


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 Post subject:
PostPosted: Wed Jul 30, 2008 5:37 pm 
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Joined: Mon Nov 07, 2005 4:27 pm
Posts: 539
Location: Santa Barbara, CA
no problems w/mine and actually thinking of drilling them out!


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 Post subject:
PostPosted: Wed Jul 30, 2008 5:59 pm 
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Joined: Wed Aug 23, 2006 9:11 pm
Posts: 2806
Location: People's Republic of Boulder
I had no problems for 2 years until my bike fell over recently and one of the clamps cracked. Now I only have one BTP clamp on. It s pretty cheap way to save weight and even if it cracks, you can still hold the lever to shift and brake -so I wouldnt really consider it dangerous.

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 Post subject: Re: BTP Shifter Clamps
PostPosted: Wed Jul 30, 2008 6:10 pm 
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Joined: Fri Jan 06, 2006 8:16 pm
Posts: 560
Location: Glendale, Ca USA
b3nault wrote:
Would like to see some pictures of these clamps "in action" on the bike.

Post them up please! :D


Ask and you shall receive... I have BTP carbon clamps installed on 3 bikes but I could only find one good picture of one bike.

1) Bianchi XL Carbon (pictured) with FSA Plasma stem/bar combo - no bar tape/exposed clamps, ~15000+ miles. I did break one clamp when I hit a pot hole at the ~4000 mile mark. Approx speed - 30 mph. Cracked the band part of clamp half way, shifter was still very much attached. Replaced with a new carbon clamp.

2) Specialized Tarmac with Zipp SLC2 bar - no bar tape/exposed clamps, about ~2800+ miles. No problems. Have had 2 crashes. In both, shifters sustained some impact with no adverse affect to clamps.

3) Cervelo SLC-SL with Zipp SL - taped bar, about ~250 miles. No problems.

So far in all 3 applications, very good service from clamps.

Advice: When on the hoods, make sure you ease up on the shifters (not applying much weight) while going over pot holes. In my mishap, no one called out the pot hole and some of my weight was leaned into the hoods. In this instance, carbon clamps can crack. Luckily only one cracked.


Attachments:
Close up stembar.jpg
Close up stembar.jpg [ 88.4 KiB | Viewed 2153 times ]
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 Post subject:
PostPosted: Wed Jul 30, 2008 7:17 pm 
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Joined: Fri Jan 06, 2006 8:16 pm
Posts: 560
Location: Glendale, Ca USA
Gold Knight wrote:
no problems w/mine and actually thinking of drilling them out!


I totally over looked this post.

GK. Don't drill out the clamps unless you're willing to accept catastrophic failure. (Which, of course, I know you don't. Anyway, I think you said this in jest.)

But if any of you are remotely thinking about doing this, bad idea. :!:

Each clamp is as light as they're designed to be, no less. Doing so will surely make them even more susceptible to cranking.

But if you're crazy enough, don't let me stop you. :wink:


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 Post subject:
Posted: Wed Jul 30, 2008 7:17 pm 


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