drill holes in frame!

Discuss light weight issues concerning road bikes & parts.
bugmenot
Posts: 24
Joined: Tue Mar 10, 2009 4:51 pm

by bugmenot

Tomorrow I'm going to start drilling holes in my old cromoly commuter frame to get the weight down. Don't worry, I have a helmet. Will let you know how it goes!

Washdogg
Posts: 10
Joined: Thu Dec 27, 2012 8:10 pm
Location: Bucks, UK

by Washdogg

Surely this will only end in a flobbely frame? I guess if you drill holes at 45 degrees to vertical/horizontal you will retain the most stiffness... Good luck - will be interesting to see how you get on!

dmp
Posts: 331
Joined: Fri May 08, 2009 8:31 pm
Location: Denver

by dmp

bugmenot wrote:... Don't worry, I have a helmet.

With ideas like this you probably don't need one...

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HammerTime2
Posts: 5430
Joined: Thu May 04, 2006 4:43 pm
Location: Wherever there's a mountain beckoning to be climbed

by HammerTime2

I might suggest also drilling holes in your water bottles. It turns out, most of the weight savings is not from the bottle per se, rather from the reduced weight of the water they carry.

MortenE
Posts: 26
Joined: Sun Apr 25, 2010 11:11 pm

by MortenE

Wow! Why haven't I thought of that before! I lost almost a kilo!

bm0p700f
in the industry
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by bm0p700f

There is a good reason why steel frames do not come with lots of holes drilled in them and why 953 and XCR tubing is now drawn. A very good reason indeed.

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HammerTime2
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Location: Wherever there's a mountain beckoning to be climbed

by HammerTime2

bugmenot, are you a slightly less insane reincarnation of HanSolo?
In Drilling holes in CF frames to save weight, HanSolo wrote:Hi,

I am interested in drilling holes through the seat tube of my Kestrel Evoke to save weight. It looks like a sturdy bike and I feel that the seat tube is not very structural....any thought? How about the top tube?

_________________
Everything can be drilled, except tires.

austke
Posts: 204
Joined: Mon Jan 16, 2012 7:03 am
Location: Queensland Australia

by austke

Lmao, " Everything can be drilled, except your tyres".
On a more serious note, some things are more suited to tuning than others.
Frame and fork failure are more dangerous than say front or rear mech. Bugemon? Take care which ever way you go.
2013 Giant TCR Advanced SL 0, 6.92kg
2013 Giant Defy Composite 2 M, 8.5kg - Wife's
Azzurro Torino 8.55g
Fuji 650 10.8kg
Miele Lupa Triple Tandem 38,89kg

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asphaltdude
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Joined: Tue Aug 12, 2003 8:39 pm
Location: Holland
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by asphaltdude

Don't drill, shave!
Whow! That's a pretty damn nice garage door!

crohnsy
Posts: 439
Joined: Mon Aug 16, 2010 6:43 pm
Location: Canada

by crohnsy

Where's that dude with the Swiss cheese seatpost when you need him???

Phill P
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Joined: Sat Jun 02, 2007 1:10 am
Location: Melbourne, Australia
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by Phill P

Bah back in the 70s and 80s track riders used to drill out their frames all the time. Yes they lost stiffness but if you get your power from doing 150rpm you wanted to accellerate up to full power as quickly as possible.

Sure there are better places to drill on the frame than others, but if it is a strong frame drilling holes in the middle sections of the tube and leaving plenty of material between each one won't be so bad. Just don't drill 100 holes in your first attempt. See how the frame feels before drilling more (and more).

Also file the holes so there are no rough edges to act as crack propagation points.

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Wingnut
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Joined: Sat Jun 23, 2007 12:41 am

by Wingnut

della_santa_ossobuco_chain_stays_600.jpg
"It's not the destination...it's the ride!"

Eros
Posts: 3
Joined: Thu Feb 07, 2013 8:33 pm

by Eros

Drilled chainstays do actually look quite good.

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HammerTime2
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Location: Wherever there's a mountain beckoning to be climbed

by HammerTime2

until they break.

xnavalav8r
Posts: 2643
Joined: Mon Jan 21, 2008 12:09 pm

by xnavalav8r

Yeah, but those chainstays actually have tubing brazed into them perpendicularly. Those holes are for looks, not weight savings. In fact, the material added probably weighs twice what was removed.

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