Fixing a cracked bike frame (my favorite bike)
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- Опубликовано: 7 сен 2024
- How to Fix a Cracked Frame:
TFLD: I was looking for a quick cheap fix. I recommended to use a specialist, but i could not afford it.
This is my FAVE bike, I recently found a crack in the back seat post and after googling I tough there was no hope. I took it to my local welding shop in Stoke Newington, they said they would "Stick a blob on it" and it would be as good as new. So that's what I did.
Fixing the bike and making this little video was a fun little Sunday project. Hope you like it.
I would also like to say, I am aware of services that will fix a cracked frame properly, but they are really expensive. This is 100% a hack job and it does not look pretty. But I live in London, if your bike looks nice, it gets stolen...
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Ouch! watching this in 2019. To anyone watching this and considering a similar bicycle repair, and if you care about your frame, don't have it done in the way this video shows. Bring it to a professional frame builder. You will be surprised how many there are out there. Problems with the way shown in this video: The welder is using a MIG welder, which is the wrong type for this application. TIG is the proper type of weld for this type of joint. TIG is used for finer detail and preferred for bicycle tubing which in most cases only has a 1mm wall thickness. And lastly an angle grinder for clean up.. If you bring your frame to a place for a repair and the guy pulls out the angle grinder, RUN!
It looks like he gouged it pretty badly with the angle grinder. It could have been done much more cleanly with a file. I wouldn't be surprised if it cracks again.
This is a brazed frame. You can see it in the first shots , a copper-like glow... going over this with a MIG welder and saying its you favorite frame is just brutal in my eyes..
and the worst part NO SAND PAPER OR PAINT....its just a shitti job.
Such a useless comment.
Unfortunatly we dont have such a man called professional frame builder , so i think im going to a welding shop as the video shows
You should have had the ends of the crack drilled out to stop further spreading of the "tear" before getting it welded. Now there's a chance that it will re-open at those places.
I don't understand how steel will tear? CAn somsone explain?
@@comdrive3865 cracks around the seatpost most likely due to having incorrect size seatpost, not enough seatpost is in the frame. I have seen people clamp the seatpost so hard then they stick a screwdriver to in the ears of the lug to open it but end up making a crack down the middle of the seatpost. If you have a small crack its best to drill a hole where the crack is which stops it from spreading
@@rafaeldelfino4549 why do they drill a hole
@@BlackMamba-lt8oe there is a well known study where the stress at the point goes to infinity when the radius goes to zero. Drilling a hole increases the radius and distributes that force along the curvature. This prevents further cracks, best is to get the tube replaced
@@rafaeldelfino4549 not practical
so many comments from bike snobs saying its botched. yes, a braze or even a tig weld would have been better... but for 8 quid you can't go wrong.
to repair cromoly bike frame, you should use cromo filler (er80) or 312 stainless filler. I repaired a bike frame using 312 stick electrodes.
The weld adds character :^) I know a guy who rode this 80's Bianchi Pista and had the seat tube cracked away from the bottom bracket because he didn't know there was a pool of water at the bottom of his frame. Pretty bummed out about it, but he's getting it fixed up now by a specialist now. -$1000
Yea, I recently bought another Bianchi Pista VIA Condotti 2012 and the seat post is stuck. I am spaying it every day with oil hoping it loosens up. Sounds like i might have the same problem as your friend.
Just what we were looking for in the csmper.
Another dope vid! Your filming and editing is awesome man
oof! "I have a welder" ≠ "I can safely fix that."
I shall say it, and other bikers will say it after me “Steel is Real”
tis true #steelisreal
This is an awesome job for the cost and time.
this video is pure pain
Great video!
My used Bianchi must’ve been front ended prior to my purchase of it. I’ve noticed a small crack on the head tube:(
hoping to do the same as you.
Step four, see what a bloody mess they made of the job. Seriously have they had any training at all?
Tbh mig welding is not ideal for thin metal tubes. That's why it looks so fab
Where?
Sabba, where did you go to get the weld done for less than a tenner? I've called all the metal shops around me in Cambridgeshire and they all say it'll be about £50 minimum to fix a crack on my frame.
what a nice therapy !!!!
I've got a GT avalanche and the part where you adjust the seat and pole up and down has snapped just below where you tightin it with the Allan keys can anyone tell me if it's fixable because seems a shame to break dwn for parts as the part in excellent condition. People have told me by welding the frame it will just melt it am getting different stories off everyone. If someone could drop a help comment be much appreciated thanks people 👍
can you provide the work shop address in London?
you need brazing, not SMAW for this, very irresponsably
Why brazing?
@@brunobatistaalves7774 brazing are the ones used on Steel Frames like the famous steel colnago.
I have a crack in the same spot. Quick question, how much does the labor cost?
What’s the name of the place you got it fixed?? This exact thing happens to my 80’s Raleigh!
Crown Welding in Stoke Newington. They are nice guys.
so much for steel frames not cracking
steel cracks, fact!
Steel is like anything else, though it is less likely to crack compared with other materials.
lightweight steel bikes do crack because they are Brad Pitt,good steel bikes are meant to be heavy,and will last for a million years
@@paddypete1 true, my old Raleigh burner was bullet proof, but saying that as a kid I'd ride four miles on it and I was practically dead as it weighed more than most mopeds. 😂
looks a bad job,hope they gave you compensation,your suppose to look through the mask,just ruined a good old frame,but thanks for showing us what not to do,so wee do ours the right way,my granny would have done it better,and she's dead 40 years
I do recommend using a specialist if you can afford it. To be honest, the frame is holding up good over time, I have no regrets.
@@skeynejad Your frame was brazed together not welded. Now you just have ruined a beautiful Bianchi steel frame. Next time give it to Paul Brodie from Bike frame building 101.
He can show you how you can restore it properly.
That's really a shame what you did to this frame.
@@Schlafanzugmen why so affected lmao
mine was crack at the bottom😩😩
What were the tools you used?
Is your bike frame made of aluminum?
It cost £8 because it was a god awful job
4 years later and its holding up a treat!
How much did it cost
Like £10
how is it holding over time?
Its good, No signs of breaking. I do need to paint it to stop it rusting.
That only cost 8 quid jesus
Nice, how did you crack it though?
Miku Cavendish it was an old bike, went over a speedbump and it gave way.
Sabba Keynejad
Damn.
I know, Killer!
how bout roctite epoxy bond?
I dont think so. Where is yours cracked?
mine is not cracked yet.. but it is pretty old. so
Many people swear on it i´d say stay away from it. Sure that was not the best repairjob with the welding but with epoxy at this position it would last maybe a few weeks to months before cracking again that weld will last longer for sure. If it had been mine i would have reinforced it but if you can´t do that repair in your own workshop it will cost you quite a bit more than 8 bucks. Braizing only is no option with this crack unless you are a real braizing artist with that crack you can´t go around welding. I personally would have inserted a copper tube (steel weld does not stick to copper) the size of the seatpost, drilled a bit into the ends of the crack to prevent spreading, weld the crack, smooth it down, make a steel sleve with a few holes in it to go around the cracked area, braize it to the seattube with silver and then weld it through the holes i drilled before (if i welded around the edges it it would just weaken the whole seattube and cause new weak spots for cracks), reream the seattube and repaint the bike. If you have done a repair like this by a guy charging 15 bucks an hour you are in for at least 45 bucks plus material cost. Not effective at all. In case anyone red through this: Don´t try welding steel frames at home if you are unexperienced because often you will just melt holes into your frame.
Step 1. Get someone else to do it for you..
I thought bianchi was a good bike frame
Poor bike... bad idea..
*¿ES DE ACERO?* (STILL)😆👍🏿
Google Translate: MADE OF STEEL
I got a better frame then this old junk and I’m doing the same thing to fix it cheap!! Thanks for the great video