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Help cutting carbon seat tube to size.

by propagandazoo
Thu, Nov 12, 2020 20:13
6

Hello everyone. Just got a carbon 595 look frame and wondering.

1. Can I hacksaw (or other technique) the seat tube to lower the height of the seat. See pictures below.

2. How does one do this? Are special tools required. Do I need to expoxy the cut. Any tips appreciated.

Thanks in advance.

https://drive.google.com/folderview?id=1Zvsd5DL6JUCkhzCg9mtR0AIk3RkdOV_J

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

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6 comments

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propagandazoo | 4 years ago
1 like

I have now cut the seat tube. Very happy with results. Slight paint-flaking on one side. But cut was accurate and straight. I have posted pictures here... 

https://drive.google.com/drive/folders/1Zvsd5DL6JUCkhzCg9mtR0AIk3RkdOV_J...

Last two photos show cut. 

Horrible touch up paint work on seat unit was previous owner... I will do a better job on it at some point.  

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Nick T replied to propagandazoo | 4 years ago
0 likes

Good work

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propagandazoo | 4 years ago
0 likes

Thanks for everyones' comments. Good advice regarding using a specilaist shop or Look themselves.  I am unfortunately too poor to allow others to repair or modify my second-hand bikes. And after building a wheel from scratch, I feel that I should continue my dive into bicycle mechanics.   

I found this video, and I ordered the tool and carbon blade. I will post result when complete.

https://www.youtube.com/watch?v=AlUr3SCMYLM  

I have read some horror stories about people using both the Look tool and the Park Tool offering. Happens, I think, by not using a carbon cutting saw blade... Normal blades are appartently thinner.        

I also found an old forum post where someone even suggested using an abrasive disc chop saw  -  which I believe would work but I don't have access to one. Will definately try on scrap frame one day... See them sometimes on Ebay and want to play...  

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Nick T | 4 years ago
0 likes

How much are you looking to lower it? This frameset came with various size collars to adjust the saddle height by raising/lowering the stubby post, but I'm pretty sure you could cut the ISP itself. You'd require an incredibly straight and square cut to stop it looking like a bodge job however, I'd get in touch with a Look dealer and let them do it as the frame originally came with a cutting guide tool. 
 

E Post cutting video here https://youtu.be/0VTSs3QzvnA

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jacknorell | 4 years ago
2 likes

Find an experienced bike mechanic. If you don't know how to look up how this is done you shouldn't attempt it. Mechanic is cheaper than a replacement frame.

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AfterPeak replied to jacknorell | 4 years ago
0 likes

Yes please use your local bike shop. I almost messed up a steerer once. They won't charge that much and it will be done professionally.

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