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How thick is the wall of an alloy chainstay? Got this frame for a parts bin build and I’m happy with the large area of scratching towards the back of it but at the front there’s some rubbing that looks like it might have been from a chainring that has put a 1-2 mm groove into the metal. It’s a bit hard to assess because it’s on the area of the chainstay that is dented to give space for a chainring so may not be as deep as it appears. Or it might be…😬
Any opinions gratefully received
Personally. Nope.
The large messy scuff area - chainsuck? Might be OK on it's own, although hard to tell from pics.
The large looking gouge further forward; if it's as bad as it looks in the image - that would put me off.
Yeah. Assuming you’re not doing massive jumps / gaps. Worst case scenario a chainstay fails it probably won’t be the end of the world. If it was a fork or bars my response would be very different.
No. I’d push for a refund!
I'd ride that no worries.
I'd probably ride it, but I wouldn't be happy if I'd bought it and the pictures/description failed to show it properly.
Nopes, i'd replace.
Nope - that looks too deep for me to feel happy riding that.
All my bikes looked like that in the 90s when chainsuck was fashionable. Never had a progression to failure despite dropping off everything I could see. I was only ten stone though. Not sure I'd send drops on that if I was a big lad.
Wouldn’t worry me. I’m a wheels on the ground mincer mind.
No. I’d push for a refund!
from the manufacturer/designer.
For 10 years.
That front gouge where the tube has been crimped and near that cable guide weld looks like a potential perfect storm of stress concentration and weakened tubing. However, it’s only one of four tubes holding the rear wheel so it’s unlikely to cause a catastrophic crash…
However, it’s only one of four tubes holding the rear wheel so it’s unlikely to cause a catastrophic crash…
Agree, I've snapped two frames in the rear triangle and, when it happened, both times it initially just felt like my tyre had gone flat.
I'd ride it.
I'd ride it too. If it breaks it's unlikely to be catastrophic, more that the bike starts crabbing sideways.
I have seen worse. And ridden worse.
Surely the answer is a cheap new frame from the Chiggle fire sale?
I'd ride that.
If it fails it won't be a nasty one, as said above it'll feel like a flat tyre or possible some sideways movement.
Would there be any benefit in filing any burrs and filling it with some liquid metal putty or similar? Or would that make no difference?
Just a matter of time till it snaps. If I was skint then I'd be tempted to sand and fill it and apply a carbon wrap over the top and keep riding it.
I would have that filled with some weld
I'd ride it, even if it cracks I can't see it being spectacular or cause you to instantly fly over the bars.
Probably but you're in a better position to judge really OP.
Does it make you wince when you put your fingernail in that gouge?
No. I’d push for a refund!
from the manufacturer/designer.
For 10 years.
Hold on, there's no evidence it's an On One.
I had a chainstay snap there before after a bit a bad chainsuck. The first I noticed was the wheel rubbing as I started honking up a hill but I still managed to cycle home.
As others say, you'll be fine as long as you're not doing jumps/drops.
What's the frame? Nice colour 🙂
The chain suck area I’m happy with, it is the area further forward that has made me think twice.
The chain rub looks fine to me. It's the 2nd picture with the triangle removed that looks like a deal breaker for me.
Probably, at least if it breaks it’ll be a safe break
wbo
Free Member
What’s the frame? Nice colour 🙂
Trek Marlin
Really like the frame so it’s a shame. Think I’ll be returning it
I assumed this was an old frame. If it's new, send it back.
New second hand
No problem riding it !!
@filks did you buy it knowing it was like this, and did you get it for a bargain price?
Yes pretty cheap because of ‘scratches on chainstay’ not ‘deep gouge on chainstay’
Is it my imagination or does this look like it's cracked though the tube completely?
I think that’s just paint and the angle of the photo. That section looks ok to me, it’s the gouge bit I’m worried about
Yes pretty cheap because of ‘scratches on chainstay’ not ‘deep gouge on chainstay’
Justified in asking for refund if that was just described as "scratches".
Ride it: yes
buy it: it’d need to be cheap as chips
I'd use it as a pub / local shops bike 👍
I’d ride it.
Probably smooth off the rough edges of those ugly gouges first with some wet and dry though.