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Lessening Frame Weight by Drilling(34 posts)

Lessening Frame Weight by DrillingFloater
Nov 28, 2001 9:46 AM
I am only 115 lbs. I reason that there is no need for all that spare metal around my flats frame at that weight. Therefore, I am gonna remove some of it.

Now it's obvious that I can drill the headset tube with no ill - effects, same with the BB tube. I can also lose a little around the bottom stay/seat stay join area without a problem.

However, I am just wondering what I can take out of the "main" tubes, and where, for best results. I am gonna buy a frame specially for this project, and am thinking Ti -Any views/better suggestions?

Greatful for help - with carbon gruppo, stem/bars and post, record eveything else and X2's, I aim to get very near 14lbs!
great idea!bn
Nov 28, 2001 9:52 AM
and when the frame fails and you smash your face on the pavement you can sue the frame builder and the drill/bit maker! (whe you get out of the ICU, of course)
Consider trepanation, toomr_spin
Nov 28, 2001 9:53 AM
As long as you are going to start drilling things, why stop with the frame? Check out Trepanation for more ways to lose weight!
Maybe he's already done this? ;-) (nm)grzy
Nov 28, 2001 10:19 AM
I'm thinking about drilling out my ass (nm)mickey-mac
Nov 28, 2001 9:55 AM
nm
LOL - Get the home liposuction kitKristin
Nov 28, 2001 10:52 AM
Just follow these steps:

Purchase:
One large soldering iron
20 Bath Sized Towels (tip: Maroon towels can be washed and reused)
3 Leather Straps w/Buckles (leather belt can be used)
Anesthetic. Recommend 2 Gallons of your favorite Gin/Tequila (whatever does it for you.)
1 Round Trip Ticket for each household member to visit inlaws on weekend of home surgery.

On day of surgery:
File the tip soldering iron so it is sharp
Heat soldering iron
Drink 16ounces of anethetic (careful not to pass out with hot soldering iron laying around)
Strap one arm and two legs to the dining room table (perhaps this is better done before you drink the fifth.)
Insert iron and poke around a bit
Take regular doses of anesthetic
You're even more twisted than I thought! ;-) (nm)mickey-mac
Nov 28, 2001 11:24 AM
nm
No kidding!cioccman
Nov 28, 2001 11:52 AM
Why do you want to count calories and figure out the difference between carbs and fibers and fats when you've got the home lipo kit! LOL
wow, what else do you keep in thatWoof the dog
Nov 28, 2001 11:56 AM
bedroom closet? Leather straps and shit? You ARE twisted...I stared at that message for a while.

Cheerfully barkin'

Woof.
Super idea - don't forget to drill out the spokes too. nmmuncher
Nov 28, 2001 10:00 AM
It's the combined bike + rider weight that countsNessism
Nov 28, 2001 10:04 AM
Drilling holes in a frame is not recommended. The wind drag will offset any benifit of the removed weight. Why not remove weight from your body instead. You can ditch a kidney, (only need one anyway), cut off your ears (cause wind drag), loose the family jewels (no time for sex, too busy riding), appedix, tonsils...everything not needed for cycling.
Funny you say thatFloater
Nov 28, 2001 10:12 AM
I already lost a kidney, so no dice there.

What's up with you guys? You don't need all that metal in the head tube - there's already a stress bearing tube in there anyway - same with the BB tube.

Us tiny guys don't need the acreage you fat guys need, and there is no aero disadvantage if you drill the holes in the right place - you don't have to drill both sides of the tube at each point either - some parts of the frame are non stress bearing - there are CF frames with no seat tube, for example.

What's so funny about drilling above spending $$$$$$ to save 1/10th of grammes on fancy parts?
Secret for drilling to save weight. . .js5280
Nov 28, 2001 10:07 AM
1) Place ear directly against frame area you want to drill out.
2) Pick up drill
3) Align drill bit with opposite ear
4) Commence drilling

Guarenteed to work everytime and maximize your weight savings! Good luck, let us know how it works!
One word: Fatiguegrzy
Nov 28, 2001 10:17 AM
You gotta be smoking crack to think like this.

You want a superlight frame that won't let you down, then buy a Calfee.
re: replace seat and post with carbon fiber dildodzrider
Nov 28, 2001 10:41 AM
That was just plain nasty!firstrax
Nov 28, 2001 11:24 AM
How Wuuude!!! nmJar Jar Binks
Nov 28, 2001 2:17 PM
re: Lessening Frame Weight by Drillingbrider
Nov 28, 2001 10:53 AM
Well, let's see... Merckx drilled out the back side of his handlebars for his hour record. I've seen poeple drill out components (chainrings, front and rear derailleurs). But to start in on the frame has got to be the most idiotic thing I've heard yet. Obviously you have no understanding of the stresses on the frame (even at 115 lbs). Don't think the head tube takes any stress? What do you think resists the twisting of the top and down tubes? Any time a member is in tension, and you introduce an opening, you're asking for crack growth (the reason water bottle bosses are thicker). I'm guessing you're young. Go ahead and give it a try. Make sure you do a lot of fast descents in the high mountains. Alone. Hopefully you haven't reproduced yet.
Take a deep breath and repeat after me...Kristin
Nov 28, 2001 11:33 AM
"f-l-a-m-e b-a-i-t"

well done!
Take a deep breath and repeat after me...kyroadie
Nov 28, 2001 1:05 PM
Say it louder! "FLAME BAIT"!
throw away your rear brake-dumb but not as dumb nmdupe
Nov 28, 2001 10:58 AM
Sounds like it's time...Lone Gunman
Nov 28, 2001 11:03 AM
to thin the herd. Drill away, go as fast as you can and make as big a splat as possible.
Whistling frameTig
Nov 28, 2001 11:10 AM
With the wind whistling through your drilled out frame, you should be able to play it like a flute. After a while, you can tape over certain holes to achieve specific notes. Different tubes can be tuned to present an overall harmonic chord. Imaging the bike lust looks of fellow cyclists and musicians alike! Invitations to parades will be rolling in after an appearance on David Letterman's show.

Seriously, I remember seeing a few attempts at this back in the 70's and the results were quite silly and ineffective. Knocking 1/2 pound off a frame while weakening it by a huge margin is a waste of time, money, and energy. Doing it to a steel frame is a great way to invite rust. I forgot the exact RPM's and drill bit cutting angle from my aircraft days, but drilling Ti without following the exact recommendations will weaken it dramatically.

Wanna' lose weight? Take an enema.
BWAHAHAHAHAHAHAHAHAHA!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!the insultan
Nov 28, 2001 11:23 AM
try this tooMike P
Nov 28, 2001 12:00 PM
You can completely remove the tube that is between the seat and bottom bracket. It serves no real purpose anyway. Be sure to leave enough of it for the seatpost though. This will lighten the frame a lot and will also decrease wind resistance a whole bunch.
Floater = turd in w/fatgrzy
Nov 28, 2001 12:16 PM
Makes if "float" when in the sh!tter.

Isn't 115 lbs. a bit scrawny for a guy?

This has to be a troll.
Drill it down to about 10 lbs....Returd
Nov 28, 2001 12:33 PM
Helium !Steve B
Nov 28, 2001 3:23 PM
Better to seal the frame and inject helium into the tubes. Lighten's it right up. Same trick works for the tire/tubes. And don't forget your head ! - Gotta' fill them empty spaces with something !

SB
This is the funniest topic in weeks!Dutchy
Nov 28, 2001 4:21 PM
?����? ?l the bottom bracket, head set, seat post and cranks, even the hubs
could be cross drilled. These parts are the heaviest so the most weight will be saved.
You can also remove one fork blade, do you really need two for the road? Removing every
second spoke will also help. If really desperate to save weight, just get a hack-saw
an remove the whole left side chain stay/seat stay traingle. You may have to learn to balance a bit
better having removed these parts but you will save weight.

Then buy a REALLY good life insurance policy and find the steepest, nastiest downhill and give it a try.

Don't forget to write to us from hospital about how much lighter your new bike felt while descending.

Should be a good read:-)

CHEERS.
This is the funniest topic in weeks! (try again)Dutchy
Nov 28, 2001 4:24 PM
What you do is drill out the bottom bracket, head set, seat post and cranks, even the hubs
could be cross drilled. These parts are the heaviest so the most weight will be saved.
You can also remove one fork blade, do you really need two for the road? Removing every
second spoke will also help. If really desperate to save weight, just get a hack-saw
an remove the whole left side chain stay/seat stay traingle. You may have to learn to balance a bit
better having removed these parts but you will save weight.

Then buy a REALLY good life insurance policy and find the steepest, nastiest downhill and give it a try.

Don't forget to write to us from hospital about how much lighter your new bike felt while descending.

Should be a good read:-)

CHEERS.
how bout this...Woof the dog
Nov 28, 2001 10:56 PM
does anyone know if such things really exist? There are cannonsnails with one fork blade/shock) I don't see why can't you make an only-one-drive-side bike with a left fork blade. Probably would be much heavier overall, but do you think possible? I think it is. Pic would help!

Speaking of balancing such a thing...I don't think it would be a problem. Do you think that all the stuff regular bikes have on the drive side (derailures, cassette, chain, heavier crank) affects the perpendicularity of a bike plane to the ground?

Cheerfully flapping my ears,

Woof the dawg.
re: Lessening Frame Weight by DrillingtachShoppe
Nov 28, 2001 5:05 PM
there is almost no point in drilling at the spots that are inconsequential to frame integrity. most high end frames are already tapered at these places and certain compaies are making bikes specifically for light weights. Drilling a heavier frame is not going to achieve the same kind of structrual strength and weight as a high quality frame(litespeed, Colagao, etc.) w/ a pair of stoopid light wheels, say ZIPP 303z

i agree w/ you on not needed a super beef frame for the little guys though.
Is that the new "in" thing?kenyee
Nov 28, 2001 7:24 PM
I was surprised to see this on the Scapin frames a few days ago:
http://www.scapin.com/img/scapin1/30scapin_450.jpg

I would have thought it would weaken the tube too much. Weird.
be a pioneer - go for itDog
Nov 29, 2001 7:44 PM
No one in history has been stupid enough to actually try that. So, be a pioneer! Drill that sucker out. Make sure someone follows you with a video camera, though. They might make a quick $10k selling it to some TV "stupidest videos" show. Then, if you haven't killed yourself, you can take the money and buy a decent light bike.

Dog