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Author Topic: How to Cut Carbon Bars?  (Read 2543 times)

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Offline ProEdgeBiker .

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How to Cut Carbon Bars?
« on: May 29, 2009, 04:45:25 PM »
What's the best way to cut Carbon Bars? any specific tool for the job? im going from Flat Bars 580mm to LoRise 635mm so i need to take off about 1 1/2" on each side of the risers.
 
Thanks!
« Last Edit: May 29, 2009, 04:52:31 PM by ProEdgeBiker »

Offline Robert Lucio

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Re: How to Cut Carbon Bars?
« Reply #1 on: May 29, 2009, 04:52:48 PM »
I used a hacksaw with a new fine tooth blade.
 
I put tape around the bar where I was going to cut it to mark the cut and also reduce splinters.
 
Then I went all around the bar and made a slight score for the blade to follow.
 
Then cut off the excess.  I did this by cutting my way around rather than straight through.
 
 
 
 

Offline catman

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Re: How to Cut Carbon Bars?
« Reply #2 on: May 29, 2009, 04:55:50 PM »
Steering tube cutting guide will do the trick as well. That's what I use on my non-carbon bars.
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Offline BillT

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Re: How to Cut Carbon Bars?
« Reply #3 on: May 29, 2009, 05:45:50 PM »
You don't need to cut them.  There is like all of 1 tight tree section in all of Florida and it now has a bypass which you shouldn't even have to use as you can get through it just fine with a 635mm bar...once you get closer to 700mm, it becomes much harder.
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Offline drb81

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Re: How to Cut Carbon Bars?
« Reply #4 on: May 29, 2009, 05:54:01 PM »
You don't need to cut them.  There is like all of 1 tight tree section in all of Florida and it now has a bypass which you shouldn't even have to use as you can get through it just fine with a 635mm bar...once you get closer to 700mm, it becomes much harder.

yes but narrow bars equals faster steering, my single speed still feels akward with 25" wide bars on them.
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Offline catman

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Re: How to Cut Carbon Bars?
« Reply #5 on: May 29, 2009, 06:05:03 PM »
I had 25" on my SS and couldn't stand them. Put a 26" on there and enjoy the bike much more now. Can't believe you're taking 1.5 inches off. 24" bars????
 
Have seen some guys running super narrow flat bars on XC racing rigs but I really don't get it.
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Offline bikehard

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Re: How to Cut Carbon Bars?
« Reply #6 on: May 29, 2009, 06:31:48 PM »
I drilled a hole a tad bit bigger than my bar ends in a block of wood.... then ripped the block of wood in half on my table saw....wrapped the ends in painters tape....clamped each side on the end of my bars as a guide and went to town w/ a fine tooth hacksaw blade...finished sanded the ends flush to the jig facing... painted ends w/ clear nail polish to seal and prevent fraying...viola!!

I had to cut mine down about 3/4" on each end for a better feel and way better steering response.  I think my bar was 27 1/4" wide stock now 25 1/2".

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Offline BillT

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Re: How to Cut Carbon Bars?
« Reply #7 on: May 29, 2009, 06:32:50 PM »
Bah!  Narrow bar pansies!

 ;D
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Offline slowfatguy

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Re: How to Cut Carbon Bars?
« Reply #8 on: May 29, 2009, 08:05:42 PM »
narrow bars come in handy in alot of places, I've always ran mine at 24.5ish.
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Offline Daniel

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Re: How to Cut Carbon Bars?
« Reply #9 on: May 29, 2009, 08:19:42 PM »
I have been in metal and composite work for years. You want a very sharp (like new) small tooth blade. Prevents chipping and cracking. Yes, if done wrong you can run a nice big crack along a vector angle following the weave. Cut slow and light, don't push too hard.
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Offline Triple T

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Re: How to Cut Carbon Bars?
« Reply #10 on: May 30, 2009, 08:26:07 AM »
Find the tight tree section that Bill mentioned, put it in the big ring, and plow through there as fast as you can.  Should take off the excess for you.   ;D
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Re: How to Cut Carbon Bars?
« Reply #11 on: May 30, 2009, 09:37:52 AM »
Bah!  Narrow bar pansies!

 ;D

There are 2-3 spots where wide bars slow me down, the rest of the time I really enjoy the extra leverage and control of my wide bars...
 
The most important thing, as Daniel mentioned, use a brand new blade and let the blade do the cutting don't force it.  Oh and measure twice and cut once  ;)

Offline ProEdgeBiker .

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Re: How to Cut Carbon Bars?
« Reply #12 on: May 30, 2009, 01:03:31 PM »
I took the bike for a spin around the block with the uncut bars and it just feels too wide, specially since i've been riding 580mm flat bars for the past 5 years. i love the control the narrow bar gives me and yes, being able to not slow down between tight spots is also a big advantage, even though my shoulders sommetimes hit.

I feel since i'm getting older a lil rise on the bars could help my lower back a bit.

Offline $irWattZZZZ

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Re: How to Cut Carbon Bars?
« Reply #13 on: May 30, 2009, 01:07:12 PM »
Just to echo what has already been said, 32 tooth hacksaw blade and tape the cut area to prevent fraying :)

Offline BillT

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Re: How to Cut Carbon Bars?
« Reply #14 on: May 30, 2009, 02:34:49 PM »
Find the tight tree section that Bill mentioned, put it in the big ring, and plow through there as fast as you can.  Should take off the excess for you.   ;D

The only section that gives me problems with my wide bars is as Carter on Cruddy Buddy...I just can't make it through there with them, but there is an alternate line to the right.  I can't think of any other tight spots there, Alafia or Santos.
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