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Accessory Mounting on Carbon Bars

Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Accessory Mounting on Carbon Bars

Old 11-06-07, 09:51 AM
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Accessory Mounting on Carbon Bars

Hello,

I recently bought a pair of Easton EC90 SLX Equipe carbon handlebars, and I'm trying to determine if it's safe to install my Blackburn Delphi 5.0 bike computer on the bars. The mount is a plastic piece that couldn't exert much pressure...On my old bars I had it mounted on the bars just left of the stem.

Easton's web site has a generic type drawing that shows an "X"d out area on either side of the stem indicating nothing should go there...

I also sometimes use a cheap "helmet cam" type camera, also bar mounted, to record certain rides I make. This camera records onto a 2 GB SD card, and with lithium AA batteries weighs about 200 grams. It also has a plastic mount that I had placed on the bars just left of the bike computer on the old bars.

I realize that the stem clamp area is reinforced to withstand the clamping forces there.

Where do you guys with carbon bars mount your computers/HRM/GPS, etc.???

I have searced for a stem mounted solution but no luck yet...

Thanks,

DPN
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Old 11-06-07, 10:20 AM
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I wouldn't worry about mounting accessories to my carbon bars (I'm using the FSA Kwing) personally. I'd just avoid things with clamping loads that also will bear weight light aero bars. It's mainly the crush force that's a killer for carbon tube.

Rick
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Old 11-06-07, 02:22 PM
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I don't think the tiny phillips screw is going to develop enough toque on the rubber lined plastic band to do anything at all. Now if the piece turned into a lever during an odd crash impact, then I'd worry.
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Old 11-06-07, 02:27 PM
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Yeah, I know I'm being a bit paranoid, but these are my first carbon bars, and I don't want them exploding on me as I'm screaming down some long descent!

All for a few more grams...


DPN
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Old 11-06-07, 02:27 PM
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Originally Posted by DPN View Post
.

Where do you guys with carbon bars mount your computers/HRM/GPS, etc.???
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Old 11-06-07, 02:38 PM
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My computer mount is held on with zip ties on a carbon bar and I have a Dinotte headlight (for commuting duty) held on with rubber o-ring. Never gave it a second thought actually. It's an FSA carbon bar.
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Old 11-06-07, 02:39 PM
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Originally Posted by DPN View Post
Yeah, I know I'm being a bit paranoid, but these are my first carbon bars, and I don't want them exploding on me as I'm screaming down some long descent!

All for a few more grams...

DPN
Did you know that many carbon bars actually weigh more than many alloy bars?
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Old 11-06-07, 02:43 PM
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Carbon stem AND bars. Even Botto has fallen prey to bling-bling.

Originally Posted by botto View Post
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Old 11-06-07, 02:46 PM
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Originally Posted by CastIron View Post
Carbon stem AND bars. Even Botto has fallen prey to bling-bling.
not bling, stock.
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Old 11-06-07, 02:48 PM
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Of course.
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Old 11-06-07, 03:38 PM
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Originally Posted by botto View Post
not bling, stock.
Admit it, you bought the bike because of the stem and handlebars.
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Old 11-06-07, 04:02 PM
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Originally Posted by SDRider View Post
Did you know that many carbon bars actually weigh more than many alloy bars?
Yes, some alloy bars are lighter than some carbon bars, but my EC90s weigh less than the bars they're replacing (Pinarello M.o.S.T. alloy bars...)

So far I have managed to reduce my bike's weight (2007 Pinarello Galileo Ultegra) by 1385 grams, or 3.05 pounds, at an average cost of $.878 per gram lost...

The handlebar change was worth 92 grams for me...

I'm working on small improvements now...the bigger stuff has all been done already...


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Old 11-06-07, 04:12 PM
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Originally Posted by DPN View Post
The handlebar change was worth 92 grams for me...
i bet you'd never notice a difference if someone hid a 92 gram rock in your saddle bag. carbon bars do look pretty nice though.
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Old 11-06-07, 04:24 PM
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Originally Posted by stea1thviper View Post
i bet you'd never notice a difference if someone hid a 92 gram rock in your saddle bag. carbon bars do look pretty nice though.
Hey, who's puttin' rocks in my bag???

Sure I would notice, since I've meticulously gone through everything in my bag, and weighed it. I looked for the lightest versions of what I carry that actually do the job, and go with that.

92 grams here and 92 grams there, and pretty soon you're lugging around 3 excess pounds of bike weight!

Psychologically, every time I climb a hill I think to myself "Ah, it sure is nice to not have to carry that 3 extra pounds..."

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Old 11-06-07, 09:34 PM
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Originally Posted by DPN View Post

Psychologically, every time I climb a hill I think to myself "Ah, it sure is nice to not have to carry that 3 extra pounds..."

DPN
Hell, takin a trip to the bathroom before a ride could solve that problem for many people....
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Old 11-06-07, 09:46 PM
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heh, I wouldn't worry about that at all.

hell, I slapped some vision TT bars on my Race X Lite carbon bars without a second thought. Of course, I didn't tighten everything down to the "recommended" 88 Inch pounds, but I still kept it around 50 inch pounds. Granted, when the front fork snapped and all of the force from the impact torqued the TT bar, the handlebars were screwed...
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Old 11-06-07, 09:58 PM
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Originally Posted by Buckshot77 View Post
Hell, takin a trip to the bathroom before a ride could solve that problem for many people....
that argument gets old. really old.

to the OP congrats on dropping the 3 pounds
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Old 11-06-07, 11:28 PM
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A bit off topic, but I once saw a guy clamp a easton carbon seatpost and proceeded to hit it with a hammer again and again at full strength. The post did not break. Easton makes good carbon bits.
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Old 11-06-07, 11:29 PM
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Originally Posted by DPN View Post
Hello,

I recently bought a pair of Easton EC90 SLX Equipe carbon handlebars, and I'm trying to determine if it's safe to install my Blackburn Delphi 5.0 bike computer on the bars. The mount is a plastic piece that couldn't exert much pressure...On my old bars I had it mounted on the bars just left of the stem.

Easton's web site has a generic type drawing that shows an "X"d out area on either side of the stem indicating nothing should go there...

I also sometimes use a cheap "helmet cam" type camera, also bar mounted, to record certain rides I make. This camera records onto a 2 GB SD card, and with lithium AA batteries weighs about 200 grams. It also has a plastic mount that I had placed on the bars just left of the bike computer on the old bars.

I realize that the stem clamp area is reinforced to withstand the clamping forces there.

Where do you guys with carbon bars mount your computers/HRM/GPS, etc.???

I have searced for a stem mounted solution but no luck yet...

Thanks,

DPN
man....it's almost impossible to ruin a carbon bar....read the Easton website.....I run Locking grips on my Easton Monkey Lite XC carbon bar on my mountain bike.
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Old 11-07-07, 11:45 AM
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Originally Posted by kudude View Post
that argument gets old. really old.

to the OP congrats on dropping the 3 pounds
I'll just mount this stuff on the bars...

Thanks for the congrats!!!

DPN

For anyone interested, here's what I went with...

I went with Easton Orion II wheels saved 416 grams
Thomson Elite Seat Post 31.6 190 grams
Toupe 143 saddle 148 grams
Lightweight skewer vs. quick release 58 grams
Michelin AirComp Tubes 65.6 grams
Easton EC90 SLX Equipe bars 92 grams
FAS Carbon Pro Compact crankset 218 grams
FSA Platinum Pro Ti BB 24 grams
Veloplugs vs. rim tape 30.6 grams
Dura Ace 10 speed cassette 69 grams
Carbon RavX Alpha cage 36 grams
Nylon cage bolts 6 grams
Computer / cadence magnets 5.4 grams
Cut seatpost 28.1 grams

Total so far 1386.7 grams or 3.06 pounds
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Old 11-07-07, 12:44 PM
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Originally Posted by roy5000x2 View Post
heh, I wouldn't worry about that at all.

hell, I slapped some vision TT bars on my Race X Lite carbon bars without a second thought. Of course, I didn't tighten everything down to the "recommended" 88 Inch pounds, but I still kept it around 50 inch pounds. Granted, when the front fork snapped and all of the force from the impact torqued the TT bar, the handlebars were screwed...
I have heard that mounting TT bars on the carbon bars voids the warranty of the handlebar though....
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Old 11-07-07, 06:09 PM
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I 've got Profile Design carbon aero bars mounted to the stock carbon handlebars on my Allez. All I've done is been careful to not overtorque them. 2 years and no problems (yet).
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Old 11-07-07, 06:34 PM
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You can probably squeeze the bar with more force with your hand, than those little screws will.
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Old 11-07-07, 08:15 PM
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Originally Posted by Bike enthusiast View Post
I have heard that mounting TT bars on the carbon bars voids the warranty of the handlebar though....
bah, it's only void if the part shouldn't be on there...I mean, c'mon. Where else am I suppose to mount the bars? Definitely should be on there.

Maybe I should pester the owner of my LBS. He can probably do something about it, though I don't expect too much. Trek only gave me $330 credit when my carbon fork failed, thus causing the carbon frame to "under suspicion of carbon failure" thus making it useless.
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