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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 08-12-06, 08:07 AM   #1
food
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Conversion Catastrophe

Wrenching around a little late last night, I decided to try my hand at removing braze-on cable-guides on a sweet 1984 Raleigh Grand Prix. I used the wonderful search function and found that I had two choices:

1) I could use a dremel to shave them off, or,
2) I could use a torch and and pliers to neatly pop them off.

Going with the one that caused the least potential damage to the frame and the least potential disturbance to the neighbours, I chose option number 2.

Well, ladies and gentlement, I chose wrong. After successfully removing the braze-ons on the top tube, I proceeded to the down tube cable-guide. A neat pop-off resulted in my horror as I discovered that the braze-on took a portion of the frame with it and now there's a hole in the downtube the size of a braze-on footprint right where a cable guide would be just above the bottom bracket. !!!!

Now what? Is this structurally unsound? Or can I continue like it never happened? Pics to follow.
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Old 08-12-06, 08:12 AM   #2
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Just don't go down any screaming descents and ride it until the frame fails

Or throw it out since my ancient Raleigh turned out to be a horrible conversion, but what can you expect from a frame that's been sitting in the backyard for 6 years
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Old 08-12-06, 08:12 AM   #3
food
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Here is the ill-fated downtube. 'Scuse my wobbly hands this morning.
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Old 08-12-06, 08:15 AM   #4
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Dude, that hole is so small that the only side effect will be the 0.0001 seconds you shave off of your commute
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Old 08-12-06, 08:20 AM   #5
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Quote:
Originally Posted by euphoria
Dude, that hole is so small that the only side effect will be the 0.0001 seconds you shave off of your commute
I was kind of hoping to smooth it out a little and make it a design element, sort of like a BB opening, but on the downtube instead, plus it saves me a few grams right? I was going to outfit this ride with Carbon Sports Lightweights and Zero G cranks and front brakes. Every little bit counts right? Riiiight?

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Old 08-12-06, 08:42 AM   #6
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Quote:
Originally Posted by food
Here is the ill-fated downtube. 'Scuse my wobbly hands this morning.

OH MY ****ING GOD, its probobly going to explode.

I have dents that would affect my bikes structural integrety substantially more and I ride it and its fine, don't worry about it.
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Old 08-12-06, 08:44 AM   #7
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...mine eyes could be wrong, but it looks like a neat little patch that the torch/you didn't originally create...so, shouldn't cause strucrual problems in the frame...right?
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Old 08-12-06, 09:21 AM   #8
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You might want to plug it to keep water out of the frame. That hole was there before you took the braze-on out. Unlikely to be a structural problem.
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Old 08-12-06, 09:35 AM   #9
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Quote:
Originally Posted by slim_77
...mine eyes could be wrong, but it looks like a neat little patch that the torch/you didn't originally create...so, shouldn't cause strucrual problems in the frame...right?
Quote:
Originally Posted by cheg
You might want to plug it to keep water out of the frame. That hole was there before you took the braze-on out. Unlikely to be a structural problem.
sorry friends, I was a little unclear. the braze-on actually took out the chunk that was there. i've lent my macro lens out so i can't get a closer shot without losing focus, but while it may look neat, trust me when i say it's not. the footprint of the braze-on actually ripped out the corresponding amount of metal from the frame. odd innit?..
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Old 08-12-06, 09:50 AM   #10
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whoa. your downtube has a freakin seam. that tiny hole is the least of your worries.
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Old 08-12-06, 10:02 AM   #11
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braze it shut and file it smooth.
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Old 08-12-06, 10:02 AM   #12
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cheap steel.

Don't worry about your bike, it'll be fine. Plug the hole if you want.
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Old 08-12-06, 11:01 AM   #13
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looks like your torch didn't even melt the paint.
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Old 08-12-06, 11:31 AM   #14
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Buddy, I've seen bars on a 30 year-old hay baler that look healthier than that pipe. Seriously -

That's a bad sign and what's with that seam? Think twice.
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Old 08-12-06, 11:41 AM   #15
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Quote:
Originally Posted by Mr. Joker
whoa. your downtube has a freakin seam. that tiny hole is the least of your worries.
Quote:
Originally Posted by the pope
Buddy, I've seen bars on a 30 year-old hay baler that look healthier than that pipe. Seriously - That's a bad sign and what's with that seam? Think twice.
sorry guys, it was odd lighting. it's definitely not a seam; the pipe is completely smooth. it's the overhead lighting that puts a streak in the black gloss.

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Originally Posted by Falkon
cheap steel.
yup. there's a sticker on the seat tube that proudly proclaims hi-ten. hehehehehe.
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Old 08-12-06, 07:03 PM   #16
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To get ride of my braze ons, I hacksawed them off and then filed it down. It came out nice.
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Old 08-13-06, 12:58 PM   #17
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...stash pocket?
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Old 08-14-06, 10:16 PM   #18
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fill it up with that foam that floats and attach a ski to the bottom.
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Old 08-15-06, 12:42 AM   #19
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i have a grand prix conversion. i took the braze ons off by just twisting them with a wrench. i don't have a resulting hole but i do like the bike. build it up and ride it, don't worry about the hole unless it gets worse.
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Old 08-15-06, 07:26 AM   #20
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Quote:
Originally Posted by food
Here is the ill-fated downtube. 'Scuse my wobbly hands this morning.
Drill more holes and turn your frame into a sort of flute.
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Old 08-15-06, 07:35 AM   #21
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Quote:
Originally Posted by food
yup. there's a sticker on the seat tube that proudly proclaims hi-ten. hehehehehe.
Most fixie conversions are. I'm only uppity because I have columbus tubing on my steel bike.
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Old 08-15-06, 07:43 AM   #22
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-I just removed all the braze-ons from an old Nishiki frame with a flat head screw driver and blunt nose pliers. They just popped right off. I couldn't believe it. But now you'd never know they were there.
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Old 08-15-06, 08:24 AM   #23
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Actually I find my Sears Robo-Grip pliers and a slight back and forth twisting motion does the trick. Most braze-ons pop off with nary a scar to the tube!
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Old 08-15-06, 08:38 AM   #24
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I guess I do it the hard way. Hack saw, file, sandpaper.
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Old 08-15-06, 10:37 AM   #25
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Quote:
Originally Posted by Falkon
Most fixie conversions are. I'm only uppity because I have columbus tubing on my steel bike.
Most crappy conversions are. A lot of old frames out there are solid 531, too.
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