GP5000 TR vs. Pro One TLE Addix, 30 vs. 28mm
03-14-22, 07:30 AM
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Tom's rolling resistance tests shows the 25 mm to have a lower Crr than the 32 mm at the optimal pressure for both. We are not discussing comfort but speed. Optimized to rim? What do you mean? For me, this means the air flow stays attached for as long as possible and I am unaware of a single aero rim on the market that will do that with a 32 mm wide tire. In short the aerodynamics will suck on a 32 mm tire on any rim compared to a 25 mm tire on an aero rim. It could be 5-50 watts depending on speed. Not trivial at all in terms of speed. Again, if you want to say 32 mm is more comfortable, fine. No argument. I often ride a bike with 40 mm tires at 40 psi. It is very comfortable but also very slow at speed.
03-14-22, 07:35 AM
#27
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You are changing your position. You spoke about the recent comparison with the GP5000 S and not the old tire nor was your point about comfort. You are also wrong about the negligible aero loss, it is actually quite large over 18-20 mph, make some measurements and you will be surprised.
The 32mm GP5Ks is not faster than the 25 mm tire. Period.
The 32mm GP5Ks is not faster than the 25 mm tire. Period.
Aero loss from a 28 to a 30 or 32 at speed is what? A watt?
03-14-22, 07:37 AM
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Ok. Post some data or explain what you mean
Tom's rolling resistance tests shows the 25 mm to have a lower Crr than the 32 mm at the optimal pressure for both. We are not discussing comfort but speed. Optimized to rim? What do you mean? For me, this means the air flow stays attached for as long as possible and I am unaware of a single aero rim on the market that will do that with a 32 mm wide tire. In short the aerodynamics will suck on a 32 mm tire on any rim compared to a 25 mm tire on an aero rim. It could be 5-50 watts depending on speed. Not trivial at all in terms of speed. Again, if you want to say 32 mm is more comfortable, fine. No argument. I often ride a bike with 40 mm tires at 40 psi. It is very comfortable but also very slow at speed.
Tom's rolling resistance tests shows the 25 mm to have a lower Crr than the 32 mm at the optimal pressure for both. We are not discussing comfort but speed. Optimized to rim? What do you mean? For me, this means the air flow stays attached for as long as possible and I am unaware of a single aero rim on the market that will do that with a 32 mm wide tire. In short the aerodynamics will suck on a 32 mm tire on any rim compared to a 25 mm tire on an aero rim. It could be 5-50 watts depending on speed. Not trivial at all in terms of speed. Again, if you want to say 32 mm is more comfortable, fine. No argument. I often ride a bike with 40 mm tires at 40 psi. It is very comfortable but also very slow at speed.
Last edited by WhyFi; 03-14-22 at 07:42 AM.
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03-14-22, 07:47 AM
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The nonsensical statements about speed comparisons may or may not be relevant but the Crr values show about 0.2 watts differential between 25 and 32 mm for the tires in question. trivial. If you did not want to engage on that, you should have butted out and not responded directly to me.
03-14-22, 11:20 AM
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Yes, like the stuff you're spewing.
I was trying to keep you from further disrupting a thread with irrelevant and wrong information. My bad. Maybe you should look up suspension losses and listen to stuff like the cyclingtips podcast on tire pressure, because your blanket statement of -
is absolutely wrong. As I stated previously -
Setting aside the suspension losses aspect, the tire that you're stumping for, the 25mm Conti, aren't even compatible with the rims in question. This is an open and shut door, is it not? How on earth would your 25mm be faster when both the tire and the wheel manufacturers say that they do not work together and should not be used together? Can we move on, now?
is absolutely wrong. As I stated previously -
Setting aside the suspension losses aspect, the tire that you're stumping for, the 25mm Conti, aren't even compatible with the rims in question. This is an open and shut door, is it not? How on earth would your 25mm be faster when both the tire and the wheel manufacturers say that they do not work together and should not be used together? Can we move on, now?
Last edited by WhyFi; 03-14-22 at 11:45 AM.
03-14-22, 11:33 AM
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@WhyFi, please leave this thread. You’ve said multiple times you disagree but continuing the way you are is trolling.
