Road Cycling - Scott CR1 derailleur hanger

Just wondering if anyone can tell me why the CR1 frame does not have a replaceable derailleur hanger. There is a metal assembly bonded to the carbon, but if it gets bent or damaged it looks like it's new frame time. Why?

I think a carbon repair to re-attach the hanger is a lot simpler than repairing an integrated metal frame which was the reason for making the bolt on hangers in the first place, and, integrated hangers are lighter.

a replaceable hanger would probably add 7.023442234221 grams to the weight o the frame.

No replaceable derailleur hanger?

That's too bad.

In defense of the Scott CR-1. When would a derailleur hanger bend on a CF frame?

Is there anything to really worry about here?

Just wondering if anyone can tell me why the CR1 frame does not have a replaceable derailleur hanger. There is a metal assembly bonded to the carbon, but if it gets bent or damaged it looks like it's new frame time. Why?

I think you'll find far more non-replaceable deraileur hangers on composite frames nowadays... esp ones with the intention of being the lightest around. Manufacturers can usually repair it for you by melting the bonds and replacing it.

But if you're looking for a crash worthy frame - don't look at superlights or the CR1. Tubing is too thin, whether you're talking about composite or aluminium. (Altho generalyl composites do better below 1000 grams than alum would).

I think you'll find far more non-replaceable deraileur hangers on composite frames nowadays... esp ones with the intention of being the lightest around. Manufacturers can usually repair it for you by melting the bonds and replacing it.

Think about it. A replaceable hanger might add a few grams if that.The answer is that on composite frames the whole dropout can be replaced,but it cost more and is a much bigger PITA to have done.

^
Exactly, especially considering the vast majority of the CF bikes are not even constructed in the states...so is the bike really going back to Taiwan for said repair or is the company more likely just to cut their losses, expedite things, and send you a new frame?
I'm digging that heavy aluminum hanger on my CF bike. Intelligent design is your friend; design for light weight without practical considerations is not.

yeah, I know it's not just the CR1, it seems to be a growing trend with composite road frames.

But I can't really see the advantage of not having a replaceable hanger. Obviously in a crash situation it is much more likely that this type of frame will be destroyed than, say, a steel frame. But is my CR1 any less strong in a crash than, say, a CAAD7...? I don't think so, but let's not open up that can of worms. But a derailleur hanger can be bent or damaged in other ways, would be nice to have the option to fix it myself, and I can't see wh there is a growing trend away from this.

Think about it. A replaceable hanger might add a few grams if that.The answer is that on composite frames the whole dropout can be replaced,but it cost more and is a much bigger PITA to have done.


Hey I'm not defending or justifying the design. I'm just telling it as it is - the movement is going for minimialism, both for weight weenie points as well as manufacturing ease. It is probably cheaper to make a single dropout with a deraileur mount than having to hire a high school graduate to install it on a dropout after the frame is completed. Obviously it isn't a big enough a sacrifice for a lot of people to decide their business, else consumer research would have probably uncovered it and manufacturers would market that as a selling point.

But you'll probably only find small custom build guys who'll market that point... they don't have the means to deal with the extra inbound repair work if people can DIY at the LBS or home.

Just curious how much labor and $ are we talking about to replace a drop-out on a CF frame?

How many people have had to replace the d/hanger?? In 12years of social riding on and off road, and racing (not wanting to upset the crash gods) :( I've never had to do it nor have any of the people I ride with, that I know of, though I think one needed straightening after a fall. Is it such an issue???

I'm digging that heavy aluminum hanger on my CF bike. Intelligent design is your friend; design for light weight without practical considerations is not.

Ditto. I am sure that some out there will scoff at the heavy chunky replacable dropout on my CF frame but I take comfort in the design. Also, I can replace it with horizontal dropouts if I ever want to turn the bike into a singlespeed.

http://www.neebu.net/~khuon/albums/2001-aegis-aro_svelte/PICT0017.jpg

How many people have had to replace the d/hanger?? In 12years of social riding on and off road, and racing (not wanting to upset the crash gods) :( I've never had to do it nor have any of the people I ride with, that I know of, though I think one needed straightening after a fall. Is it such an issue???

I've replaced the dropout on my MTB twice since I've had it... mainly due to crashes. I have several spares on hand. I even carry one in my CamelBak.

I've replaced the dropout on my MTB twice since I've had it... mainly due to crashes. I have several spares on hand. I even carry one in my CamelBak.
The CR1 ain't no mountain bike

The CR1 ain't no mountain bike

No... but the poster to which I was responding had mentioned offroad riding.

Too much hype surrounding weight of bike components at the cost of functionality sometimes. I wish they put a deraileur hanger on that CR-1.

No... but the poster to which I was responding had mentioned offroad riding.
point taken :)

Ditto. I am sure that some out there will scoff at the heavy chunky replacable dropout on my CF frame but I take comfort in the design. Also, I can replace it with horizontal dropouts if I ever want to turn the bike into a singlespeed.



Looks very similar to the hanger on my LOOK. I never even thought about the possibility of converting to a single speed by replacing the dropouts but I could do that too. Cool.

I bent the derailleur hanger on my TCR Comp. The repair was a $20/20 min job. I would prefer that to any type of repair that required stripping the components off the frame so that the manufacturer can repair/replace the frame.