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Slowtwitch Forums
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Triathlon Forum
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drilling holes in carbon extensions for cable routing
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m@tty
Nov 20, 09 15:02
Post #1 of 29 (606 views)
drilling holes in carbon extensions for cable routing
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Any top tips and advice please?
Wanting to get some lazy s extensions (they seem to only be available in carbon no alloy option) and drill them!
Thanks in advance!
M@TTY
R10C
Nov 20, 09 15:13
Post #2 of 29 (597 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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and drill them!
Why?
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f.k.a - Record9, Record9ti Record10, Record10ti, Record10Carbon, but not SuperRecord11 as there are no bar ends.
m@tty
Nov 20, 09 15:19
Post #3 of 29 (593 views)
Re: drilling holes in carbon extensions for cable routing [Record10Carbon]
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read the thread title!
BMAN
Nov 20, 09 15:25
Post #4 of 29 (590 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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I would not drill them but I would dremel them in a second and have done so but a little differently than what you are looking to do.
I have fitted my Oval straight extensions onto my HED brackets as this set up is very clean. The Oval extensions already have a hole for the housing to go into up at the shifters but on the Oval brackets the cable exits out the back of the extension which can not happen with the HED brackets. The HED brackets will allow the housing to come out just before the bracket but you have to make a slot to have the housing come out. So I slotted the back of my carbon extensions with the dremel and it worked very well.
Make sure that you wear a mask as carbon dust is just nasty and make sure that you tape over the areas that you are going to work on to keep the fibres together as much as possible. My dremel work was very clean and came out very nicely.
I do not think (maybe be wrong) that you will weaken the carbon if you are careful.
Good Luck.
Aero & Light is Right
SLC 2.0
m@tty
Nov 20, 09 15:45
Post #5 of 29 (584 views)
Re: drilling holes in carbon extensions for cable routing [BMAN]
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thanks for the input I am looking to use the extensions on a set of 3T mistral bars so the cable would be exiting at the rear and i would only need to cut out 1 slot per extension similar to the slot on oval extensions that i am using at the moment!
I will look into borrowing a dremmel!
Would you use any glue or resin to seal round the edges of the slot?
Im thinking of using the lazy s extensions back to front as this will give me an extension similar to the blackwell wrist reliefs think I will have to trim a bit of the internal clamps on my shifters as well to make them fit!
M@TTY
m@tty
Nov 20, 09 15:57
Post #6 of 29 (574 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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shifters this end
cables exiting this end!
_______________________^slot about here!
M@TTY
BMAN
Nov 20, 09 16:42
Post #7 of 29 (549 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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You might have to dremel out the ends of the extensions if you are using them backwards as it is thicker down at that end as I currently have the lazy s-bends from head. I was using the JAGWIRE mounts for the bar end shifters that fit over instead of in and these work amazingly well and are lighter.
Cheers.
Aero & Light is Right
SLC 2.0
R10C
Nov 20, 09 16:51
Post #8 of 29 (542 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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Why again? Will bar tape not handle this for you?
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f.k.a - Record9, Record9ti Record10, Record10ti, Record10Carbon, but not SuperRecord11 as there are no bar ends.
m@tty
Nov 21, 09 0:01
Post #9 of 29 (498 views)
Re: drilling holes in carbon extensions for cable routing [BMAN]
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Thanks again for the info cant use the jagwires as they are not campagnolo compatable and I think will probably trim down the material from the shifters rather than the extensions to get the shifters to fit!
M@TTY
m@tty
Nov 21, 09 0:09
Post #10 of 29 (497 views)
Re: drilling holes in carbon extensions for cable routing [Record10Carbon]
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No bar tape will not handle this for me!
Having just looked at a pic of your pink bike I can see that for you every second doesnt count!
M@TTY
R10C
Nov 21, 09 0:16
Post #11 of 29 (494 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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Having just looked at a pic of your pink bike I can see that for you every second doesnt count!
M@TTY
Nope - seconds dont count...and where again is it that you plan to qualify? Oddly, I would suspect that my +/- 11 hr IM times are a bit ahead of yours....
Again...why drill your carbon bars?
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f.k.a - Record9, Record9ti Record10, Record10ti, Record10Carbon, but not SuperRecord11 as there are no bar ends.
m@tty
Nov 21, 09 4:40
Post #12 of 29 (465 views)
Re: drilling holes in carbon extensions for cable routing [Record10Carbon]
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- seconds dont count...and where again is it that you plan to qualify? Oddly, I would suspect that my +/- 11 hr IM times are a bit ahead of yours....
Again...why drill your carbon bars?
Seconds do count for some people, But I suppose for you its just the taking part that matters?
Qualify for what?
Oddly? Nothing odd about it I suspect your IM times probably are ahead of mine as if you had bothered to read my profile you would have noticed I am not a triathlete!
+/- 11 hrs did you stop for lunch?
M@TTY
(This post was
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by m@tty on Nov 21, 09 6:59)
applenutt
Nov 21, 09 5:18
Post #13 of 29 (447 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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I have drilled Hed extensions before, no issues. One thing to consider with using those extensions backwards is the end that you are clamping to the base bar. Since you will be installing them backwards, you will be clamping the thin carbon, rather than the thick side whre you plan to put your shifters. In effect they will be weaker and maybe prone to cracking if you hit a bump or clamp them too hard. Just something to think about.
www.teamkattouf.com
"Online Nutrition, Fitness, Sport, and Life Coaching"
m@tty
Nov 21, 09 5:33
Post #14 of 29 (440 views)
Re: drilling holes in carbon extensions for cable routing [applenutt]
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Thanks that is one problem I hadnt considered!
Think they should be ok as long as they are about 1.2-1.4mm thick!
The british HED importer is about an hour from me so might pay them a visit and have a look before I get my wallet out!
M@TTY
BMAN
Nov 21, 09 8:48
Post #15 of 29 (381 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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Chip has his off nights and it just appears that last night was one of them. Do not worry. Some on ST forget that Ironman is not the be all to end all and others like different distances to race.
Aero & Light is Right
SLC 2.0
m@tty
Nov 21, 09 9:18
Post #16 of 29 (371 views)
Re: drilling holes in carbon extensions for cable routing [BMAN]
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Chip has his off nights and it just appears that last night was one of them. Do not worry.
I have learned in life to engage my brain before my mouth it could be usefull advice for some after all this forum is here for advice!
The advice I have got from this thread have been very usefull and I would like to thank those who have contributed!
I have in the past missed out on a national medal by 1 second and this year the scottish 100 mile time trial championships had a margin of 4 seconds between 1st and 2nd!
M@TTY
BMAN
Nov 21, 09 12:07
Post #17 of 29 (336 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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I can understand what you are saying. The last race I did, I TIED for first place. Exact same time as far down as the timer could go. So anything that could have helped for just 1 second would have been great for me.
I learned that you have to work as hard as you can to train the body and mind AND you have to get the best set-up you can afford for the bike and pay attention to the aero details as well.
Aero & Light is Right
SLC 2.0
R10C
Nov 21, 09 12:16
Post #18 of 29 (328 views)
Re: drilling holes in carbon extensions for cable routing [BMAN]
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Alas, at the end of the day - those cables under bar tape, or in the bar will not save a second from anything anywhere. All that will be done is to void any warranty on the bars and weaken their structure. Cutting carbon nine times out of ten is a bad idea as the hole is a new place that will be prone to failure...a second wont matter if the extension fails mid race :-)
People are so hell bent on getting cables into bikes, bars, tubes blah blah blah...(not that the OP did) and then they bitch about crappy shifting, poor brake feel and PITA cable routing....what I love is folks who spent hours and hours on trimming their cables yet have 4" of helmet strap flapping from the clip :-)
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f.k.a - Record9, Record9ti Record10, Record10ti, Record10Carbon, but not SuperRecord11 as there are no bar ends.
m@tty
Nov 21, 09 12:34
Post #19 of 29 (320 views)
Re: drilling holes in carbon extensions for cable routing [BMAN]
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Chip has his off nights and it just appears that last night was one of them.
He appears to be having another one tonight! doesnt seem to understand the concept of gaining advice and tips from people who have actually tried something themselfs and know if it works!
why is it that when you ask for advice there is always someone with limited knowledge giving an opinion rather than an answer?
M@TTY
m@tty
Nov 21, 09 12:45
Post #20 of 29 (317 views)
Re: drilling holes in carbon extensions for cable routing [BMAN]
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I can understand what you are saying. The last race I did, I TIED for first place. Exact same time as far down as the timer could go. So anything that could have helped for just 1 second would have been great for me.
I know the feeling! There are two types of people the ones who compete and the ones who take part and if you want to compete you have to look at every little thing its the little things that make a difference!
M@TTY
R10C
Nov 21, 09 12:50
Post #21 of 29 (312 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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No no, years of 'drillium' in days past. It is never ever a good idea to drill any part of your bike that is going to have to bear a load. I many years ago had a Scott DropIn LF bar fail...oddly, right at the hole that was drilled in it for an internal brake cable (well before STI). Your bars do support a load (even if it is only you pulling up on them)..the risk IMO far out weighs any potential gain, not to mention that there is not a second in a cable route. One second 99times out of 100 is not something that can be faulted on equipment unless there is something just glaring out there as to catch the wind.
Clean routing...good. Drilling load bearing parts of a bike....bad.
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f.k.a - Record9, Record9ti Record10, Record10ti, Record10Carbon, but not SuperRecord11 as there are no bar ends.
m@tty
Nov 21, 09 13:05
Post #22 of 29 (304 views)
Re: drilling holes in carbon extensions for cable routing [Record10Carbon]
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So you have experiance of drilling a bar decades ago made from a different material that was at the time marketed with one of its selling points being that it had varying wall thicknesses!
Hardly relevant to this thread!
M@TTY
Runless
Nov 21, 09 13:11
Post #23 of 29 (297 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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Any chance we could get some additional Mistral pictures? Do you have the basebar slightly tilted down?
Does the bar come with all the hardware that is needed to run the extensions on top of the basebar?
Did you happen to weigh the bar?
Thanks for any additional info you can give on the bar.
R10C
Nov 21, 09 13:13
Post #24 of 29 (296 views)
Re: drilling holes in carbon extensions for cable routing [m@tty]
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Carbon is FAR more prone to crack than Alu as it's structure is very dependent on the total of the structure. You can with much more confidence drill a metal than a composite. The other thing to remember, most metals fatigue and fail with more often than not some warning - carbon on the other hand fails suddenly and catastrophically when it fails.
No matter how you cut it, it is not a good idea to alter the structure of a carbon item that is going to have a load on it. Would you not think that 'if' the structure could candle it that the MFG would have put it there knowing that their customers would want it? Not to be a dick but I dont want to see you get hurt trying to save a second by drilling a carbon bar that may or may not fail. It does not have a hole, does not need a hole (by all rights). I still dont understand what is so 'un' aero about just wrapping the cable to your bars like all the rest of us.
(as a note, if you look at the CarbonX and other 'carbon' bars with cable holes - those holes are in the Alu section of the bar not the carbon area. I an mot sure I have ever seen a carbon bar with cable holes)
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f.k.a - Record9, Record9ti Record10, Record10ti, Record10Carbon, but not SuperRecord11 as there are no bar ends.
m@tty
Nov 21, 09 13:19
Post #25 of 29 (294 views)
Re: drilling holes in carbon extensions for cable routing [Runless]
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I do have them slightly tilted down!
The extensions mount either top or bottom and I have used an oval concepts riser kit under the arm rests to get the right height for me relative to the extensions!
I didnt weigh the bar as I dont consider weight that important in a time trial!
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