J∆kk∆ls Posted February 13, 2020 Posted February 13, 2020 Summer Yksion Pro UST tubeless tires 25mm, 95psi back, 90psi front. 86kg Winter Conti 4000S. 90psi back, 85psi front, 86kg+ (winter riding is slower and less hills, black ice!)
NicholasT Posted February 13, 2020 Posted February 13, 2020 Hutchinson Fusion 5 All Season. 28mm Tubeless.62psi (4.2bar) Front and back.About 83kgs.
Veebee Posted February 13, 2020 Posted February 13, 2020 On 2/13/2020 at 1:15 AM, Mongoose! said: 81kg Continental GP 4000 ((n my opinion a better tyre than the GP5000 ) 28mm (Scott Foil rim brake / Supersix rim brake) rear 6.2 barfront 5.9 baryou one of the very few people who think that...
eddy Posted February 13, 2020 Posted February 13, 2020 Real question: There are some very precise measurements being quoted, but how accurate are they ? I tried two pumps and their (analog) gauges differed by about 10% and neither was what my digital Topeak read. I am going with the digital one.
Mamil Posted February 13, 2020 Author Posted February 13, 2020 I have to aggree with you RE the 4000 and 5000 - my 5000's felt horribly squishy and unstable and punctured frequently. Wasn't happy. On 2/13/2020 at 1:15 AM, Mongoose! said: 81kg Continental GP 4000 ((n my opinion a better tyre than the GP5000 ) 28mm (Scott Foil rim brake / Supersix rim brake) rear 6.2 barfront 5.9 bar
Wannabe Posted February 13, 2020 Posted February 13, 2020 Vittoria Rubino Pro 700x23c:+- 7 bar on my newish analogue Track pump.+-85kg in "racing tim"
Duane_Bosch Posted February 13, 2020 Posted February 13, 2020 On 2/13/2020 at 6:48 AM, eddy said: There are some very precise measurements being quoted, but how accurate are they ? I don't think 100% accuracy is that much of a factor. Most of us will use the same pump all the time so the relative pressure will be the same not so? Weirdly I have 2 pumps. One is for the roadies and one is one of those air tank boys and that lives with the mtb's.
Prince Posted February 13, 2020 Posted February 13, 2020 On 2/12/2020 at 2:14 PM, Schnavel said: Wow, that must an absolutely terrible ride! Why on earth would you pump them so hard? I have just always had them at that pressure and don't like the feel of soft tyres. I ride my 25mm tubbies at 9 bar!
Jehosefat Posted February 13, 2020 Posted February 13, 2020 On 2/13/2020 at 7:46 AM, Prince said: I have just always had them at that pressure and don't like the feel of soft tyres. I ride my 25mm tubbies at 9 bar! You mean you don't like the feel of comfort and grip while cornering?
Prince Posted February 13, 2020 Posted February 13, 2020 To be honest never tried lower pressures. I just sort of inflate to just below the suggested max on the tyre. I'll drop the pressures for this weekend's ride and see.
Furbz Posted February 13, 2020 Posted February 13, 2020 25mm GP4000s II Tubolito Tubes Weight: 69kg TRAINING Front: 6bar Rear: 6.3bar RACING Front: 6.6bar Rear: 7bar all about gaining comfort on my training rides. in races i inflate higher
Furbz Posted February 13, 2020 Posted February 13, 2020 On 2/13/2020 at 8:06 AM, Prince said: To be honest never tried lower pressures. I just sort of inflate to just below the suggested max on the tyre. I'll drop the pressures for this weekend's ride and see.you have not lived. might be slightly more rolling resistance, but the comfort gained is something you cannot turn your nose up to. especially if its a training ride
Jehosefat Posted February 13, 2020 Posted February 13, 2020 On 2/13/2020 at 8:15 AM, Furbz said: you have not lived. might be slightly more rolling resistance, but the comfort gained is something you cannot turn your nose up to. especially if its a training ride Pretty much all of the studies show that lower pressures have lower rolling resistance on everything except perfectly smooth roads so inflating your tyres harder doesn't even give you less rolling resistance unless you are doing track cycling.
The Ouzo Posted February 13, 2020 Posted February 13, 2020 On 2/13/2020 at 9:05 AM, Jehosefat said: Pretty much all of the studies show that lower pressures have lower rolling resistance on everything except perfectly smooth roads so inflating your tyres harder doesn't even give you less rolling resistance unless you are doing track cycling.all this talk of rolling resistance of fatter lower pressure tyres, has there been any studies that look at the aerodynamic pros/cons of running fatter rubber ?
Long Wheel Base Posted February 13, 2020 Posted February 13, 2020 On 2/13/2020 at 9:05 AM, Jehosefat said: Pretty much all of the studies show that lower pressures have lower rolling resistance on everything except perfectly smooth roads so inflating your tyres harder doesn't even give you less rolling resistance unless you are doing track cycling.Link to these studies, please? Keen to read them.
HdB Posted February 13, 2020 Posted February 13, 2020 On 2/13/2020 at 9:45 AM, Long Wheel Base said: Link to these studies, please? Keen to read them.Not a study, I guess, but an interesting read:https://www.bicyclerollingresistance.com/specials/grand-prix-5000-comparison Comparing GP5000s at various widths and pressures.For example:
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