Frame tossed?
06-24-16, 01:14 AM
#1
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Frame tossed?
Got a nasty stuck chain that actually bent the chain pins... and did some decent damage to the frame.
After sanding:
Curious thing is that the chain didn't drop when I was shifting to the small chain ring, I was shifting to the bike one after I was done with the climb
Still need to figure out how the heck a dropped chain to the big chain ring gets stuck like that.
After sanding:
Curious thing is that the chain didn't drop when I was shifting to the small chain ring, I was shifting to the bike one after I was done with the climb
Still need to figure out how the heck a dropped chain to the big chain ring gets stuck like that.
06-24-16, 02:56 AM
#2
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How on earth did it do that much damage? Did you not stop when you realized that the chain had dropped?
FWIW I wouldn't ride that frame anymore.
FWIW I wouldn't ride that frame anymore.
06-24-16, 06:34 AM
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Jesus that looks like MULTIPLE revolutions after the drop. Dip you just keep pedaling through all the grinding and noise?! I can't make it even half a turn after a dropped chain.
06-24-16, 07:07 AM
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don't try this at home.
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Ouch! Strange that it was during a shift to the big chain ring.
My frame has very little spacing down at the bottom bracket, and a dropped chain would instantly jam in there. So the LBS installed a chain catcher when the bike was new. It must be policy with them, they didn't ask me. No scratches on the catcher, so the chain has never dropped, but I like having it there for peace of mind.
Repair
There are carbon frame repair services. One of the first was the custom frame maker Calfee . They can rebuild the damage and for extra cost, repaint so that the repair is invisible.
Calfee repair
From a google search, here's another: carbonframerepair.com
I like their description:
Frame Repairs (Inspection fee of $50 – put towards repair)
~~~
He could pedal all day, but nothing more would happen, since the chain was off the ring. Must have had to pry it out of there, but that's still a lot of damage.
It's often best to try to pull it out radially and work from both ends, instead of yanking on one end of the chain to get it out.
If it's this stuck, I'd remove the crankset to free the chain. (But probably wouldn't consider it until I'd done a bunch of damage first, and that's not an easy field repair.)
It does seem that the chain may have dropped more than once...
My frame has very little spacing down at the bottom bracket, and a dropped chain would instantly jam in there. So the LBS installed a chain catcher when the bike was new. It must be policy with them, they didn't ask me. No scratches on the catcher, so the chain has never dropped, but I like having it there for peace of mind.
Repair
There are carbon frame repair services. One of the first was the custom frame maker Calfee . They can rebuild the damage and for extra cost, repaint so that the repair is invisible.
Calfee repair
From a google search, here's another: carbonframerepair.com
I like their description:
Frame Repairs (Inspection fee of $50 – put towards repair)
- $200-$250 Mere Flesh Wound – partial tube patching for minor carbon frame damage
- $250-$350 Healthy Carnage – Carbon wrap the entire tube for a more serious cracked carbon frame
- $350+ Hella FUBARed- Missing chunks of carbon or partially flattened tubes
~~~
He could pedal all day, but nothing more would happen, since the chain was off the ring. Must have had to pry it out of there, but that's still a lot of damage.
It's often best to try to pull it out radially and work from both ends, instead of yanking on one end of the chain to get it out.
If it's this stuck, I'd remove the crankset to free the chain. (But probably wouldn't consider it until I'd done a bunch of damage first, and that's not an easy field repair.)
It does seem that the chain may have dropped more than once...
Last edited by rm -rf; 06-24-16 at 07:26 AM.
06-24-16, 09:17 AM
#10
pan y agua
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Repair
There are carbon frame repair services. One of the first was the custom frame maker Calfee . They can rebuild the damage and for extra cost, repaint so that the repair is invisible.
Calfee repair
From a google search, here's another: carbonframerepair.com
I like their description:
Frame Repairs (Inspection fee of $50 – put towards repair)
~~~
There are carbon frame repair services. One of the first was the custom frame maker Calfee . They can rebuild the damage and for extra cost, repaint so that the repair is invisible.
Calfee repair
From a google search, here's another: carbonframerepair.com
I like their description:
Frame Repairs (Inspection fee of $50 – put towards repair)
- $200-$250 Mere Flesh Wound – partial tube patching for minor carbon frame damage
- $250-$350 Healthy Carnage – Carbon wrap the entire tube for a more serious cracked carbon frame
- $350+ Hella FUBARed- Missing chunks of carbon or partially flattened tubes
~~~
With all the talk about CF not being durable, its actually easier to repair than most metal frames.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
06-24-16, 09:32 AM
#11
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About 200 miles, uphill, on an average 73% grade. If you stop pedaling just because a chain dropped, a wheel cracked or your heart stopped beating, you need to HTFU!
Spot on! It was the second time the chain dropped in the last month, both of times it got stuck there. When it dropped going to the big chain ring, I shifted back to the small one and tried to gentle peddle to bring it back. at that point I couldn't pedal after a revolution or two and I had to pull off and try to unstuck it.
It was really jammed there, so I managed to unstock the bottom first and put it half length of the chain ring again and thought back pedaling would pull the chain back in place. Nope... got even more stuck.
At that point I realized 3 things:
#3 probably got the work done, but the chain came out twisted 45 degrees and I ended up having to call Uber to take me back home.
I know it can be repaired, but it seems like a good excuse to just build a new one. There are great deals on frames on ebay and craigs list, instead of putting $300+ on a repair, may be I should get another frame.
Ouch! Strange that it was during a shift to the big chain ring.
... He could pedal all day, but nothing more would happen, since the chain was off the ring. Must have had to pry it out of there, but that's still a lot of damage.
It's often best to try to pull it out radially and work from both ends, instead of yanking on one end of the chain to get it out.
If it's this stuck, I'd remove the crankset to free the chain. (But probably wouldn't consider it until I'd done a bunch of damage first, and that's not an easy field repair.)
It does seem that the chain may have dropped more than once...
... He could pedal all day, but nothing more would happen, since the chain was off the ring. Must have had to pry it out of there, but that's still a lot of damage.
It's often best to try to pull it out radially and work from both ends, instead of yanking on one end of the chain to get it out.
If it's this stuck, I'd remove the crankset to free the chain. (But probably wouldn't consider it until I'd done a bunch of damage first, and that's not an easy field repair.)
It does seem that the chain may have dropped more than once...
It was really jammed there, so I managed to unstock the bottom first and put it half length of the chain ring again and thought back pedaling would pull the chain back in place. Nope... got even more stuck.
At that point I realized 3 things:
- It would be very easy if I removed crankset, but I didn't have the giant ass Allen required for GXP crank arms.
- If it went in, it can come out
- Hulk, Smash!!!!
#3 probably got the work done, but the chain came out twisted 45 degrees and I ended up having to call Uber to take me back home.
I know it can be repaired, but it seems like a good excuse to just build a new one. There are great deals on frames on ebay and craigs list, instead of putting $300+ on a repair, may be I should get another frame.
06-24-16, 10:28 AM
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Yeah, time to try something new like one of those reputable Chinese frames.
06-24-16, 10:34 AM
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I'm pretty confident having never done a repair myself to say that this can be done yourself for around $100. Many videos on Youtube of carbon fiber repair. I'm not sure how confident I would be on a frame broken in pieces but this is another story.
Here is a neat article talking about carbon repair bikes being just as strong if not stronger than stock. They say they fix bikes broken into multiple pieces with Cervelo and Specialized agreeing.
https://www.bicycling.com/maintenance...n-frame-repair
But hey if you want a new bike than by all means. Maybe we could work a deal on this frame, what is it?
Here is a neat article talking about carbon repair bikes being just as strong if not stronger than stock. They say they fix bikes broken into multiple pieces with Cervelo and Specialized agreeing.
https://www.bicycling.com/maintenance...n-frame-repair
But hey if you want a new bike than by all means. Maybe we could work a deal on this frame, what is it?
06-24-16, 10:47 AM
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06-24-16, 10:49 AM
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Got a nasty stuck chain that actually bent the chain pins... and did some decent damage to the frame
Curious thing is that the chain didn't drop when I was shifting to the small chain ring, I was shifting to the bike one after I was done with the climb
Still need to figure out how the heck a dropped chain to the big chain ring gets stuck like that.
Curious thing is that the chain didn't drop when I was shifting to the small chain ring, I was shifting to the bike one after I was done with the climb
Still need to figure out how the heck a dropped chain to the big chain ring gets stuck like that.
Carbon Fiber Bike Frame Repair | Appleman Bicycles
Appleman Bicycles can repair your broken, busted, or cracked carbon frame! Nearly every carbon fiber frame can be repaired no matter how severe the damage. I use my vast knowledge and experience in advanced carbon fiber structure repair to bring your bike back to it’s original strength. Carbon fiber is one of the most repairable materials! All repairs are stronger than the original bike, add no measurable weight, and don’t alter the ride of the bike.
06-24-16, 10:54 AM
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The former.
06-24-16, 10:56 AM
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Contact Appleman Bikes in Minneapolis, he does a ton of repairs (& makes great custom bike too)
Carbon Fiber Bike Frame Repair | Appleman Bicycles
Carbon Fiber Bike Frame Repair | Appleman Bicycles
eBay has some really nice frame sets going on now, for example a synapse carbon hi-mod for $999. I just didn't buy it is because it is a disc model and that would add to the cost in the form of new wheelset and new shifters
06-24-16, 11:07 AM
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Contact Appleman Bikes in Minneapolis, he does a ton of repairs (& makes great custom bike too)
Carbon Fiber Bike Frame Repair | Appleman Bicycles
Carbon Fiber Bike Frame Repair | Appleman Bicycles
06-24-16, 11:22 AM
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If this post is "real", then the OP should be looking for a vintage Schwinn Varsity. They are much more durable than the new plastic bikes.
I haven't dropped the chain yet on my "new" CF bike. But, if somehow I ended up with a badly stuck chain, then perhaps try disassembling the chainrings rather than forcing the chain out.
I haven't dropped the chain yet on my "new" CF bike. But, if somehow I ended up with a badly stuck chain, then perhaps try disassembling the chainrings rather than forcing the chain out.
06-24-16, 11:32 AM
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If this post is "real", then the OP should be looking for a vintage Schwinn Varsity. They are much more durable than the new plastic bikes.
I haven't dropped the chain yet on my "new" CF bike. But, if somehow I ended up with a badly stuck chain, then perhaps try disassembling the chainrings rather than forcing the chain out.
I haven't dropped the chain yet on my "new" CF bike. But, if somehow I ended up with a badly stuck chain, then perhaps try disassembling the chainrings rather than forcing the chain out.
06-24-16, 12:44 PM
#23
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Well. I'm talking about removing the crank arm so i could push the chainrings to the side not remove the chaing rings per say.
https://www.sram.com/sites/default/f...nual-rev-a.pdf
Page 24. Figure 8.
https://www.sram.com/sites/default/f...nual-rev-a.pdf
Page 24. Figure 8.
06-24-16, 01:51 PM
#24
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Contact Appleman Bikes in Minneapolis, he does a ton of repairs (& makes great custom bike too)
Carbon Fiber Bike Frame Repair | Appleman Bicycles
Carbon Fiber Bike Frame Repair | Appleman Bicycles
06-24-16, 02:19 PM
#25
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I really don't think frame repair is something that should be DYI unless you know what you are doing. I wouldn't want to put my life during a 50mph descent in the hands of some bloke on YouTube. Time for a new frame, or have a pro fix this one if it's super expensive.