What is considered a "light" bike?
#76
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Yes and no...
I'd say there's a fairly strong correlation between $500 to $1.5k or so.
Above that, it depends what you're spending the money on, sure. Aero, discs, Italian steel or OTOH, Meilensteins, etc. And if you bring second-hand gear into the equation, your luck/patience/connections can certainly matter more.
Certainly if you want to get much under 6.5kg it gets spendy fast, no matter what.
I'd say there's a fairly strong correlation between $500 to $1.5k or so.
Above that, it depends what you're spending the money on, sure. Aero, discs, Italian steel or OTOH, Meilensteins, etc. And if you bring second-hand gear into the equation, your luck/patience/connections can certainly matter more.
Certainly if you want to get much under 6.5kg it gets spendy fast, no matter what.
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Yes and no...
I'd say there's a fairly strong correlation between $500 to $1.5k or so.
Above that, it depends what you're spending the money on, sure. Aero, discs, Italian steel or OTOH, Meilensteins, etc. And if you bring second-hand gear into the equation, your luck/patience/connections can certainly matter more.
Certainly if you want to get much under 6.5kg it gets spendy fast, no matter what.
I'd say there's a fairly strong correlation between $500 to $1.5k or so.
Above that, it depends what you're spending the money on, sure. Aero, discs, Italian steel or OTOH, Meilensteins, etc. And if you bring second-hand gear into the equation, your luck/patience/connections can certainly matter more.
Certainly if you want to get much under 6.5kg it gets spendy fast, no matter what.
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Pedal Force super-light carbon bicycle
There are frames from common bike brands such as Cinelli that are steel that weigh under 1.5kg
https://dropouts.cc/product/cinelli-xcr-frameset/
#80
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I have this bike I purchased brand new in 2009 called a TREK DISTRICT SINGLESPEED Carbon everything. They only happen to make 50 of these that year only and that was it on them..It weighs as it sets from th factory 13.9 LBS and its wheels have yet to meet the pavement..It is as light a bike I think i have in my fleet.. It was a very expensive bike for what it is and not many would have purchased one..
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Is that on your R3 because of BBRight?
Still, my point stands: even if it's only 50 g, you paid extra to put another 50 g on your bike. I paid extra to weigh my pedals down by something like 200 g more than they need to be for the same reason: it's worth it. But you can't predict the weight of a bike from its price.
#86
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I'm a little jealous. That's a really good solution.
Is that on your R3 because of BBRight?
Still, my point stands: even if it's only 50 g, you paid extra to put another 50 g on your bike. I paid extra to weigh my pedals down by something like 200 g more than they need to be for the same reason: it's worth it. But you can't predict the weight of a bike from its price.
Is that on your R3 because of BBRight?
Still, my point stands: even if it's only 50 g, you paid extra to put another 50 g on your bike. I paid extra to weigh my pedals down by something like 200 g more than they need to be for the same reason: it's worth it. But you can't predict the weight of a bike from its price.
As to predicting a bike's weight from it's pricetag... sorta. Like anything else, there's a diminishing point of returns. We generally and correctly assume that a $1,000 bike is going to be lighter than a $300 bike-- and that differential may be on the order of a few pounds. But a $3000 bike compared to a $1000 bike, the difference may be on the order of a few ounces.
Plus, adding weight with things like power meters gives us an excuse to justify buying dumb ultralight things (like carbon fiber bottle cages) to theoretically offset the weight we paid to put on.
#87
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Curious on the meaning of the 'frame'. When we say frame weight are we talking about the diamond frame alone, or it includes diamond frame + fork + headset?
When I weighted my Tri-A when rebuilding it came out 2.806kg (diamond frame + fork + headset). Super happy with bike overall.
When I weighted my Tri-A when rebuilding it came out 2.806kg (diamond frame + fork + headset). Super happy with bike overall.
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I think you're confusing "words of wisdom" with an opinion on the unsightly nature of copious amounts of spacers on a display bike.
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Beth got me a pair of 13 gram bottle cages from Amazon. She picked them for two reasons: no letting, and one of the reviews showed them on another Cervelo.
#93
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Yes, they just usually don't advertise frame weight when they're that heavy. Some of the low-end carbon frames out there are pretty sucky, and even decent frames can get into that neighborhood if they're heavy styles. Domane SL disc frames can run upwards of 1400g, for instance.
Yes. Weight-weenie frames made from thinwall tubes can be under 3lbs, even in medium sizes.
Do steel frames get any lighter than that?
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Yes, they just usually don't advertise frame weight when they're that heavy. Some of the low-end carbon frames out there are pretty sucky, and even decent frames can get into that neighborhood if they're heavy styles. Domane SL disc frames can run upwards of 1400g, for instance.
Yes. Weight-weenie frames made from thinwall tubes can be under 3lbs, even in medium sizes.
Yes. Weight-weenie frames made from thinwall tubes can be under 3lbs, even in medium sizes.
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That's a secondary benefit. The main benefit is its high strength, which is anisotropic, allowing frame designers to make a bike that transfers pedaling effort efficiently while isolating road shock to a degree that's impossible for a metal frame in a double diamond format, unless the top tube points straight at the dropouts and there's half a metre of seatpost showing (which still wouldn't be UCI legal, which matters for everyone, because manufacturers produce very few road bike that can't be raced).
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That's a secondary benefit. The main benefit is its high strength, which is anisotropic, allowing frame designers to make a bike that transfers pedaling effort efficiently while isolating road shock to a degree that's impossible for a metal frame in a double diamond format, unless the top tube points straight at the dropouts and there's half a metre of seatpost showing (which still wouldn't be UCI legal, which matters for everyone, because manufacturers produce very few road bike that can't be raced).
Your confirmation bias is one of the strongest I've read on any forum. To truly make a carbon bike frame as strong as a steel one it would have to be as heavy if not heavier than the steel equivalent. That's not even a matter up for debate. We know the facts to be self-evidently false. We know repeatedly that people post pictures of their carbon bike being banged up after being blown over in the wind and yet people like you continue with this garbage repeatedly that "carbon is stronger than steel." After watching videos from backyard engineers that have absolutely no scientific grounding in science repeatedly abusing bike frames you confirm to yourself what is nothing other than illogical bull crap most likely because you spent so much money on your bike.
What do we actually know that is true of bike frames and bike parts?
Carbon fiber has a incredibly low fracture toughness rating by fracture toughness number. Aluminum has a fracture toughness number that is around seventy times greater than carbon and the fracture toughness number for steel is even higher again. This shows us any damages, even deep scratches, or a corner gauges where for example the steerer tube meets the forks cause what we know as "brittle failures." These fractures lead to failures that do occur at limits way below the allowable stress limits for the material. Therefore, you see sudden unexpected carbon fiber failures. So if you want to say its stronger you need to understand the whole issue. To say it's stronger period is a facile argument devoid of the truth of the matter. Carbon is only stronger under certain design conditions and when its used with extreme care.
Last edited by 1500SLR; 06-08-18 at 08:51 PM.
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To truly make a carbon bike frame as strong as a steel one it would have to be as heavy if not heavier than the steel equivalent. That's not even a matter up for debate. [...] yet people like you continue with this garbage repeatedly that "carbon is stronger than steel."
OK, I'm going to bite, even though I suspect you'll start on a whole thing about "truly":
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???
OK, I'm going to bite, even though I suspect you'll start on a whole thing about "truly": steel vs CF shaft
OK, I'm going to bite, even though I suspect you'll start on a whole thing about "truly": steel vs CF shaft
https://en.wikipedia.org/wiki/Fracture_toughness
Last edited by 1500SLR; 06-08-18 at 09:01 PM.
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