Why We Should STOP Our Obsession With Bike Weight
#101
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#102
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lets see, eliminate one leg of the fork, a seat stay extension, lower left frame stay, & then the top tube or the downtube? It now weighs 3.45kg!
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#104
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#105
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Rear wheel steering! It's all the rage with expensive sports cars!
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#106
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#107
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#109
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I watched the first couple minutes.
First time I ever saw a power meter.
So I think I learned that a power meter is a small load cell that fits inside a crank arm.
huh, kind of interesting.
First time I ever saw a power meter.
So I think I learned that a power meter is a small load cell that fits inside a crank arm.
huh, kind of interesting.
#110
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It is this bike but with Ergon GC1 BioCork grips and Kinekt seatpost and soon to have other upgrades:
https://www.r-m.de/en-us/bikes/super...466_0804022629
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#112
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It is made by Riese and Müller, it is the Supercharger2 Rohloff HS. With the dual 625wh batteries in my eco mode I am looking at 120+ miles per charge depending on conditions probably if I stayed in eco mode with a good cadence I am looking 150+. However I haven't had a chance to test the limits, I typically charge after a few full commutes just in case my plans change after work. Though I do plan on doing some touring in the near future.
It is this bike but with Ergon GC1 BioCork grips and Kinekt seatpost and soon to have other upgrades:
https://www.r-m.de/en-us/bikes/super...466_0804022629
It is this bike but with Ergon GC1 BioCork grips and Kinekt seatpost and soon to have other upgrades:
https://www.r-m.de/en-us/bikes/super...466_0804022629
#113
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Sorry I did not read all the comments. However, the video totally misses the point for me... if I could put out 200W all day everyday with 25kg, I wouldn't worry about bike weight. However, I have much less power that is also very affected by heat. Saving base bike weight can be the difference is suffering levels up hills, to being able to keep up with friends and to even attempt a ride. It can also mean the ability to carry more food, water or extra individual component weight for greater comfort.
#116
2+1+0=1
The physical (physics) models for bicycles make gross assumptions about mass and motion in order to offer simple explanations according to simple rules or laws. The dynamics of riding a bicycle in reality present the rider with a much more complicated experience not reflected in the simple models of motion. One example is assuming riding along a flat surface at constant velocity. A nice simplification, but in fact no road or trail surface is perfectly flat and a rider is constantly accelerating and decelerating along the path of motion. These "micro-accelerations" accumulate and sap the rider of energy and power. Anyone who has ridden a 5kg bicycle will tell you it is easier to ride than a 7kg bike. Another example is the difference in tire performance. The physics of tires is pretty simple, but the reality is far from simple. Just ask Verstappen how much 1psi difference in tire pressure can make in Baku...
#117
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Weight weenieism can become truly bizarre and self-defeating, especially once you start getting into bad ideas like carbon chainrings. I will say I can appreciate the feel of a light, snappy bike. My cross race bike is the lightest bike I own (16.3 lbs with pedals/cages/computer) and I can feel the lightness while riding. My road bike is right around 17 lbs out the door and it's the same. Also, both bikes have been very durable to date. Engineering is pretty good these days.
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#119
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The physical (physics) models for bicycles make gross assumptions about mass and motion in order to offer simple explanations according to simple rules or laws. The dynamics of riding a bicycle in reality present the rider with a much more complicated experience not reflected in the simple models of motion.
#121
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That makes no sense.
If that was correct, it would show up in the results--the model would fail to predict.
Perhaps you're confusing placebo effect with sensitivity. These "microaccellerations" might easily be largely counteracted by the heavier bike's carrying slightly more momentum and therefore decelerating less.
If that was correct, it would show up in the results--the model would fail to predict.
Perhaps you're confusing placebo effect with sensitivity. These "microaccellerations" might easily be largely counteracted by the heavier bike's carrying slightly more momentum and therefore decelerating less.
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#122
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Bike weight affects the "feel" and handling of a bike to a degree, but usually the differences in bike weight discussed (like maybe 2-3kg between super-light and fairly heavy road bikes) are not that significant in this respect. Riding on nominally flat terrain I wouldn't expect to pick up any time on a lighter bike. Only climbing is a real advantage and time gains are easily predictable by simple Newtonian physics over any course. For example I'm doing a 100 mile ride this weekend with around 4k elevation change. Predicted finishing time at my average endurance power is 7 hrs 35 mins. If I drop my bike weight by 2 kg the model predicts a saving of 4 mins. That's with 4k of vertical climbing! Running the same calculation on a much flatter 100 mile course, I would gain just over 30 seconds with the 2kg lighter bike. Basically nothing worth spending any money on.
#123
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You need to adjust your mental model. Rolling resistance depends linearly on weight so even on flat ground, a lighter bike will be faster due to the decrease in rolling resistance. (Yes, the difference may be small, but conceptually, weight matters even on flat terrain.)
#124
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