Bicycle DIY repair

>frame
It's the 'seatpost' that's broken. Just buy a new one for $9 on amazon.

It's usually made of aluminum, so you'd need to TIG weld it. No TIG welder is going to do that for less than $9 (or 50 for that matter).

>>1188715
JB weld? Remember to sand both surfaces and remove residues with alcohol before applying.

>>1188751
>need to tig weld it.
Shut the fuck up if you have no idea what the hell you're talking about.


>>1188715
That's a press fit inteface that is usually bonded with a two part epoxy. Clean off the residue on both parts of the fitting, get any metal bonding epoxy you want and put it back together.

I own a bike shop and you see this quite regularly on cheaper seat posts. the fit is usually pretty poor between the two and the bond breaking down from rocking/rotational stresses among other things like heat and cold.

We especially see this a lot more during late fall early spring when people are out riding in freezing weather.

>>1188888
So what you are saying is that the epoxy is inadequate. In your expert opinion, would it be better if it was, say... TIG welded?

I have a problem where when I use my front brakes, the fork starts to resonate in a violent manner. First I thought that the front wheel was loose and that was causing it to shake but that doesn't seem to be the problem.

So now I think the problem is in the joint that attaches the fork to the body. I can feel it moving a little bit when I'm standing and pushing against the front wheel. What could cause it to loosen up? I've tried tightening up all the bolts but no luck.

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>>1188715
Just raid your mom's closet for pic related and jam it on the frame. It'll be the best ride you ever had.

>>1188715

Just buy a new one. If you fix it, and it fails again, you could end up with a nasty injury. The size should be engraved into it somewhere.

>>1189349
Go ask /n/. They are pretty good at this stuff.

>>1189338
What I'm saying is that cheap bikes and cheaply made posts are just that, cheaply made. There's a 6 year old chinese kid slathering watered down chink epoxy on parts that I can guarantee haven't been degreased or prepped properly.

>>1188715
Just buy a new seatpost
Fall for the carbon meme while you're at it

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>>1188715
Fixed it
Much easier than some epoxy glue + cheaper
Will see if it will hold

>>1189599
Hey if it works it work, but if it starts to get lose epoxy is pretty cheap and you can get it at any hardware store.

>>1189412
In other words, epoxy is an inadequate solution to fix OP's seat post? Gotcha. Would welding it be a more permanent fix?

>>1189395
Thanks, I never realized what /n/ was actually about. I'll go and ask them.

>>1188715
that was press fit.

get a new 1 piece post with guts off ebay

>>1188751
>It's usually made of aluminum, so you'd need to TIG weld it.
You don't need a TIG welser, certainly not for the quality of work that /diy/ usually finds acceptable.
SMAW welding aluminum is a different feel from steel, but it works fine. Get some E4043 stick and go to town.

>>1188715
Please a fucking new seatpost.

i find that when these things actually come loose. Its not a bonding fail but a cracked tube. Ive never seen them loose to just glue fail.

(7 years in a bikeshop).

Find a bike co-op. I volunteer at one and we have a box full of donated seatposts. Might run ya 4 dollars.