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Marino Frame Dent


zoster

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hi..um... i got my marino frame, build up my bike (which btw feels incredibly good to ride, although i just tried it a bit), and on my first (and only) semi-ride, the rear wheel slipped on a sidehop and i hit the left chainstay on the ledge, and made quite a big dent (see pictures).

post-13202-1235330833_thumb.jpg

post-13202-1235330846_thumb.jpg

post-13202-1235330962_thumb.jpg

my questions are:

1. would this have happend on a more expensive steel frame (like curtis or lesson)

2. would this have happend on an alu frame?

3. what ca i do about it? i can hammer it back a bit? i can go weld some pieces of metal on that part, like the good boi frame has ... (i am really bummed, since this is a brand new frame and i was so excited about this bike it feels and look great, but...)

4. is there the risk of this frame snapping on me?

looking for some input..

thanks!

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It looks like you didn't exactly land lightly either going by them deep scratches. To be fair it's low grade steel which didn't cost much. It would of done the same to an alloy frame. I really doubt that area is prone to breaking any more than previously. I'd leave it and alter your sidehop technique. And anyway, how did you hit the frame there on a sidehop? Is there no bb rise to clear that bit?

And yes it would of happened to any other steel frame is that area wasn't designed to take hits.

Thin tubing...

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Basically steel can be bent a lot without it loosing too much strength, whereas aluminium will break if it gets bent a lot. So hammering it back will not affect strength too much, but I don't really see how you can bend it back. If it is possible weld a small but stiff plate over it as you are likely to hit the same spot again, apart from that you should be fine.

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It looks like you didn't exactly land lightly either going by them deep scratches. To be fair it's low grade steel which didn't cost much. It would of done the same to an alloy frame. I really doubt that area is prone to breaking any more than previously. I'd leave it and alter your sidehop technique. And anyway, how did you hit the frame there on a sidehop? Is there no bb rise to clear that bit?

And yes it would of happened to any other steel frame is that area wasn't designed to take hits.

Thin tubing...

nope , not exactly lighly, but the wheel did hit the ledge first, then slipped (rained outside so..)

bb is +20

the pait isn;t exactly high quqlity, so it chips of easier..

thanks for all the replies.. i think i'll let it be for now, and see if i can weld something in there to be a bit safer..

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In the meantime, throw up some pictures of the build. Been looking forward to seeing this complete :)

not quite yet, still waiting for a fork from ali c and a new saddle. i should have'em by Wednesday/Thursday

but here's a preview if you insist:

post-13202-1235333234_thumb.jpg

cracks and dints at the rear end of the bike won't put you at risk as much as damage to the front of the frame, don't worry about it (Y)

thanks, i relaxed a bit now that i've seen the replies

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It looks like you didn't exactly land lightly either going by them deep scratches. To be fair it's low grade steel which didn't cost much. It would of done the same to an alloy frame. I really doubt that area is prone to breaking any more than previously. I'd leave it and alter your sidehop technique. And anyway, how did you hit the frame there on a sidehop? Is there no bb rise to clear that bit?

And yes it would of happened to any other steel frame is that area wasn't designed to take hits.

Thin tubing...

im pretty sure everyone slips to stay every once in a while. dont think its anything to do with technique :P

looks like a sweet bike!

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I would leave it, likely to only crack if its creased across the tube.

Chances are it is a relatively thin tube compared to an aluminium one of the same size so more susceptable to denting, if it does crack then get it welded and stick a thin plate on there as armour plating - my triton frame has small bashplates welded on exactly where your dent is and Ive caught one of them on a wall, couple of scuffs but nothing else, because the plate is only welded top and bottom its not stressed and is unlikely to crack. The plate only needs to be 1-1.5mm thick to do its job :)

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I would leave it, likely to only crack if its creased across the tube.

Chances are it is a relatively thin tube compared to an aluminium one of the same size so more susceptable to denting, if it does crack then get it welded and stick a thin plate on there as armour plating - my triton frame has small bashplates welded on exactly where your dent is and Ive caught one of them on a wall, couple of scuffs but nothing else, because the plate is only welded top and bottom its not stressed and is unlikely to crack. The plate only needs to be 1-1.5mm thick to do its job :)

t-pro chainstay style then?

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Basically steel can be bent a lot without it loosing too much strength, whereas aluminium will break if it gets bent a lot. So hammering it back will not affect strength too much, but I don't really see how you can bend it back. If it is possible weld a small but stiff plate over it as you are likely to hit the same spot again, apart from that you should be fine.

Lets be reasonable, welding a plate over it unless done by a highly qualified welder and being heat treated would be worse.

At this grade of steel + thickness of the material probably wouldnt be alot more maluble than an alloy frame, so bending it back out, would only make things MUCH worse.

Just get in touch with the manufacturer or leave it and zip tie a peice of curved carbon fibre or some hose pipe to the chainstay :)

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sorry, didn't quite understand what you mean, could you rephrase it?

Lets be reasonable, welding a plate over it unless done by a highly qualified welder and being heat treated would be worse.

At this grade of steel + thickness of the material probably wouldnt be alot more maluble than an alloy frame, so bending it back out, would only make things MUCH worse.

Just get in touch with the manufacturer or leave it and zip tie a peice of curved carbon fibre or some hose pipe to the chainstay :)

I was just making a response to his question over a previous statement, I personally leave my frames and if they go I replace them, but some people like to mod their frames.

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