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#1
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Steel is Real and Carbon is Lighter
OK, I just went out and weighed my road bikes again. Just like I would walk out the door with.
Basso Loto - this is the final year of production and used Basso Tubing Concepts tubes instead of Columbus tubes. 22.12 lbs Time VX - 28 mm tires and aluminum BB lugs and multi-shaped carbon tubes. - 21.9 lbs Colnago CLX 3.0 - carbon wheels and everything else possible. 20.17 lbs. Now it seems pretty plain that I could reduce the weight of the Basso to very close to that of the Colnago. But to do so would mean I would have to put carbon wheels on it. And maybe a carbon fork which would put me in a position of having a hybrid carbon/steel bike which seems to kill the idea of having a steel bike in the first place. The real question is does this weight really make a difference? A 22 lb bike and a 190 lb lard-assed rider makes that 2 lb difference only 0.01% difference in weight and the truth is that lifting that weight up the climbs is far overshadowed by the high speed frictional drag of the body. I could more than off-set that difference by riding on the drops downhill and on the flats if it wasn't so uncomfortable to an old broken down body. As a comparison I pulled the Pinarello Stelvio off the shelf and without a flat kit or water bottle it weighed in at 21.7 lbs. The Pinarello also has custom tubing and the tubes have a slightly larger diameter than the Basso. On the local fast descents the Pinarello doesn't bounce at the bottom. And presently I have heavy Look cyclocross pedals on it so that the weights of the Pinarello and Basso are probably identical with a more modest flat kit and full water bottles. I have a Ridley cross bike that rides like a dream as a gravel bike and the Redline Conquest cyclocross bike with disk brakes. If I could sell these two I would have sufficient room to keep all of my road bikes and start riding the Pinarello again rather than trying to keep it in clean condition. What these numbers tell to me is that the only real advantage of the carbon fiber bikes is that they are more aero and so you can hold a higher speed into a headwind. What if I were to simply lower my expectations of speed-into-the-wind and keep all of my road bikes and simply concentrate on upgrading them to 11 speeds since it is unlikely that the 12 speed will ever find any markets outside of racing? Keeping the 10 speed would be preferable but spare parts are getting much more difficult and expensive to come by. Any opinions? Jay in particular is more of the riding type I do but perhaps Duane and a few others so this sort of riding as well. |
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#2
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Steel is Real and Carbon is Lighter
On 6/17/2019 12:57 PM, Tom Kunich wrote:
A 22 lb bike and a 190 lb lard-assed rider makes that 2 lb difference only 0.01% difference in weight and the truth is that lifting that weight up the climbs is far overshadowed by the high speed frictional drag of the body. I could more than off-set that difference by riding on the drops downhill and on the flats if it wasn't so uncomfortable to an old broken down body. I agree. The effect of a couple pounds of weight is tiny. .... What these numbers tell to me is that the only real advantage of the carbon fiber bikes is that they are more aero and so you can hold a higher speed into a headwind. I think the same logic applies to the aerodynamics of the bike frame. Yes, there are bikes that are designed to be more aerodynamic. But the great bulk of the air drag comes from the rider. It makes no sense to measure the reduced drag of the frame alone, any more than to compare a 20 pound bike with an 18 pound bike and say "It's 10% lighter, I should go 10% faster!" Aero wheels will be a bit faster, but colossally expensive. And I expect their advantage could be swamped by the effect of wearing a jersey that flaps a bit because it's a little too loose in the shoulders. -- - Frank Krygowski |
#3
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Steel is Real and Carbon is Lighter
On Monday, June 17, 2019 at 11:14:20 PM UTC-4, Frank Krygowski wrote:
On 6/17/2019 12:57 PM, Tom Kunich wrote: A 22 lb bike and a 190 lb lard-assed rider makes that 2 lb difference only 0.01% difference in weight and the truth is that lifting that weight up the climbs is far overshadowed by the high speed frictional drag of the body. I could more than off-set that difference by riding on the drops downhill and on the flats if it wasn't so uncomfortable to an old broken down body. I agree. The effect of a couple pounds of weight is tiny. ... What these numbers tell to me is that the only real advantage of the carbon fiber bikes is that they are more aero and so you can hold a higher speed into a headwind. I think the same logic applies to the aerodynamics of the bike frame. Yes, there are bikes that are designed to be more aerodynamic. But the great bulk of the air drag comes from the rider. It makes no sense to measure the reduced drag of the frame alone, any more than to compare a 20 pound bike with an 18 pound bike and say "It's 10% lighter, I should go 10% faster!" Aero wheels will be a bit faster, but colossally expensive. And I expect their advantage could be swamped by the effect of wearing a jersey that flaps a bit because it's a little too loose in the shoulders. -- - Frank Krygowski I often wonder just how much of the aero advantages offered by many components actually is when coupled with t he churned up air created by the bicyclist. My guess is that if the bicyclist is NOT pedaling then the aerodynamic benefits of many things might be a bit greater than if pedaling is occurring. Cheers |
#4
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Steel is Real and Carbon is Lighter
On Mon, 17 Jun 2019 20:42:18 -0700 (PDT), Sir Ridesalot
wrote: On Monday, June 17, 2019 at 11:14:20 PM UTC-4, Frank Krygowski wrote: On 6/17/2019 12:57 PM, Tom Kunich wrote: A 22 lb bike and a 190 lb lard-assed rider makes that 2 lb difference only 0.01% difference in weight and the truth is that lifting that weight up the climbs is far overshadowed by the high speed frictional drag of the body. I could more than off-set that difference by riding on the drops downhill and on the flats if it wasn't so uncomfortable to an old broken down body. I agree. The effect of a couple pounds of weight is tiny. ... What these numbers tell to me is that the only real advantage of the carbon fiber bikes is that they are more aero and so you can hold a higher speed into a headwind. I think the same logic applies to the aerodynamics of the bike frame. Yes, there are bikes that are designed to be more aerodynamic. But the great bulk of the air drag comes from the rider. It makes no sense to measure the reduced drag of the frame alone, any more than to compare a 20 pound bike with an 18 pound bike and say "It's 10% lighter, I should go 10% faster!" Aero wheels will be a bit faster, but colossally expensive. And I expect their advantage could be swamped by the effect of wearing a jersey that flaps a bit because it's a little too loose in the shoulders. -- - Frank Krygowski I often wonder just how much of the aero advantages offered by many components actually is when coupled with t he churned up air created by the bicyclist. My guess is that if the bicyclist is NOT pedaling then the aerodynamic benefits of many things might be a bit greater than if pedaling is occurring. Cheers See https://dc.uwm.edu/cgi/viewcontent.c...31&context=etd which says that the rider contributes about 70% of the total drag. Wasn't Greg LeMond's wining the 1989 TdeF attributed in part to an aerodynamic helmet? -- Cheers, John B. |
#5
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Steel is Real and Carbon is Lighter
On Monday, June 17, 2019 at 6:57:10 PM UTC+2, Tom Kunich wrote:
OK, I just went out and weighed my road bikes again. Just like I would walk out the door with. Basso Loto - this is the final year of production and used Basso Tubing Concepts tubes instead of Columbus tubes. 22.12 lbs Time VX - 28 mm tires and aluminum BB lugs and multi-shaped carbon tubes. - 21.9 lbs Colnago CLX 3.0 - carbon wheels and everything else possible. 20.17 lbs. Now it seems pretty plain that I could reduce the weight of the Basso to very close to that of the Colnago. But to do so would mean I would have to put carbon wheels on it. And maybe a carbon fork which would put me in a position of having a hybrid carbon/steel bike which seems to kill the idea of having a steel bike in the first place. The real question is does this weight really make a difference? A 22 lb bike and a 190 lb lard-assed rider makes that 2 lb difference only 0.01% difference in weight and the truth is that lifting that weight up the climbs is far overshadowed by the high speed frictional drag of the body.. I could more than off-set that difference by riding on the drops downhill and on the flats if it wasn't so uncomfortable to an old broken down body. As a comparison I pulled the Pinarello Stelvio off the shelf and without a flat kit or water bottle it weighed in at 21.7 lbs. The Pinarello also has custom tubing and the tubes have a slightly larger diameter than the Basso. On the local fast descents the Pinarello doesn't bounce at the bottom. And presently I have heavy Look cyclocross pedals on it so that the weights of the Pinarello and Basso are probably identical with a more modest flat kit and full water bottles. I have a Ridley cross bike that rides like a dream as a gravel bike and the Redline Conquest cyclocross bike with disk brakes. If I could sell these two I would have sufficient room to keep all of my road bikes and start riding the Pinarello again rather than trying to keep it in clean condition. What these numbers tell to me is that the only real advantage of the carbon fiber bikes is that they are more aero and so you can hold a higher speed into a headwind. What if I were to simply lower my expectations of speed-into-the-wind and keep all of my road bikes and simply concentrate on upgrading them to 11 speeds since it is unlikely that the 12 speed will ever find any markets outside of racing? Keeping the 10 speed would be preferable but spare parts are getting much more difficult and expensive to come by. Any opinions? Jay in particular is more of the riding type I do but perhaps Duane and a few others so this sort of riding as well. Tom, your bikes are relatively heavy according to current light weight 'standards'. I have a sub UCI weight bike (6.7 kg IIRC) and an aerobike which is a little heavier (7.6 kg). I'm faster on the latter. Just ride the bikes you have and enjoy. Everybody gets slower with age. Fortunately you can set so much filters on Strave that makes you the fastest on one or more segments ;-) Lou |
#6
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Steel is Real and Carbon is Lighter
On Tuesday, June 18, 2019 at 5:42:20 AM UTC+2, Sir Ridesalot wrote:
On Monday, June 17, 2019 at 11:14:20 PM UTC-4, Frank Krygowski wrote: On 6/17/2019 12:57 PM, Tom Kunich wrote: A 22 lb bike and a 190 lb lard-assed rider makes that 2 lb difference only 0.01% difference in weight and the truth is that lifting that weight up the climbs is far overshadowed by the high speed frictional drag of the body. I could more than off-set that difference by riding on the drops downhill and on the flats if it wasn't so uncomfortable to an old broken down body. I agree. The effect of a couple pounds of weight is tiny. ... What these numbers tell to me is that the only real advantage of the carbon fiber bikes is that they are more aero and so you can hold a higher speed into a headwind. I think the same logic applies to the aerodynamics of the bike frame. Yes, there are bikes that are designed to be more aerodynamic. But the great bulk of the air drag comes from the rider. It makes no sense to measure the reduced drag of the frame alone, any more than to compare a 20 pound bike with an 18 pound bike and say "It's 10% lighter, I should go 10% faster!" Aero wheels will be a bit faster, but colossally expensive. And I expect their advantage could be swamped by the effect of wearing a jersey that flaps a bit because it's a little too loose in the shoulders. -- - Frank Krygowski I often wonder just how much of the aero advantages offered by many components actually is when coupled with t he churned up air created by the bicyclist. My guess is that if the bicyclist is NOT pedaling then the aerodynamic benefits of many things might be a bit greater than if pedaling is occurring. Cheers TOUR magazine measures aero drag with a dummy pedalling on the tested bike. Lou |
#7
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Steel is Real and Carbon is Lighter
On Monday, June 17, 2019 at 11:57:10 AM UTC-5, Tom Kunich wrote:
OK, I just went out and weighed my road bikes again. Just like I would walk out the door with. Basso Loto - this is the final year of production and used Basso Tubing Concepts tubes instead of Columbus tubes. 22.12 lbs Time VX - 28 mm tires and aluminum BB lugs and multi-shaped carbon tubes. - 21.9 lbs Colnago CLX 3.0 - carbon wheels and everything else possible. 20.17 lbs. Now it seems pretty plain that I could reduce the weight of the Basso to very close to that of the Colnago. But to do so would mean I would have to put carbon wheels on it. And maybe a carbon fork which would put me in a position of having a hybrid carbon/steel bike which seems to kill the idea of having a steel bike in the first place. The real question is does this weight really make a difference? A 22 lb bike and a 190 lb lard-assed rider makes that 2 lb difference only 0.01% difference in weight 190+22.12=212.12 190+20.17=210.17 Difference = 1.95 lbs 1.95 divided by 212.12 = .009193 Converting to percentage, which means moving the decimal point two places to the right, equals 0.92% if rounding to two decimal points for percentages.. A little less than 1%. Yet, you write "0.01%". I will not ask what grades you received in basic math classes during your elementary school education. But it might help your so called argument if you used correct math skills. Now, does 1% make any difference? In the 2019 Giro d'Italia the final stage was a 17 kilometer time trial. The winning time was 22 minutes, 7 seconds. Second place was 22 minutes, 11 seconds. A difference of 4 seconds. 4 seconds is 0.30% of the winning time. Less than one third of one percent. Or three tenths of one percent. The winner of the Giro d'Italia 2019 won in 90 hours, 1 minute, 47 seconds total time. Second place was 1 minute, 5 seconds behind. 1 minute, 5 seconds, is 0.02% of the total winning time. Much, much, much less than 1%. Its one fiftieth of one percent. Does 1% weight difference matter? Maybe that 1% weight difference is equal to one fiftieth of one percent difference in time. Maybe. and the truth is that lifting that weight up the climbs is far overshadowed by the high speed frictional drag of the body. I could more than off-set that difference by riding on the drops downhill and on the flats if it wasn't so uncomfortable to an old broken down body. As a comparison I pulled the Pinarello Stelvio off the shelf and without a flat kit or water bottle it weighed in at 21.7 lbs. The Pinarello also has custom tubing and the tubes have a slightly larger diameter than the Basso. On the local fast descents the Pinarello doesn't bounce at the bottom. And presently I have heavy Look cyclocross pedals on it so that the weights of the Pinarello and Basso are probably identical with a more modest flat kit and full water bottles. I have a Ridley cross bike that rides like a dream as a gravel bike and the Redline Conquest cyclocross bike with disk brakes. If I could sell these two I would have sufficient room to keep all of my road bikes and start riding the Pinarello again rather than trying to keep it in clean condition. What these numbers tell to me is that the only real advantage of the carbon fiber bikes is that they are more aero and so you can hold a higher speed into a headwind. What if I were to simply lower my expectations of speed-into-the-wind and keep all of my road bikes and simply concentrate on upgrading them to 11 speeds since it is unlikely that the 12 speed will ever find any markets outside of racing? Keeping the 10 speed would be preferable but spare parts are getting much more difficult and expensive to come by. Any opinions? Jay in particular is more of the riding type I do but perhaps Duane and a few others so this sort of riding as well. |
#8
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Steel is Real and Carbon is Lighter
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#9
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Steel is Real and Carbon is Lighter
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#10
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Steel is Real and Carbon is Lighter
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