tag:blogger.com,1999:blog-6080071290235905056.post194885038927462268..comments2024-02-27T18:30:46.362-08:00Comments on Blather 'bout Bikes: New Zipp Tangentes - Speed, Course, and SLSpeed - the Crr resultsTom Anhalthttp://www.blogger.com/profile/08175472546482777614noreply@blogger.comBlogger16125tag:blogger.com,1999:blog-6080071290235905056.post-31999268589960773212020-10-23T10:44:40.954-07:002020-10-23T10:44:40.954-07:00This comment has been removed by the author.Greg Prosmushkinhttps://www.blogger.com/profile/06469085569109130005noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-57512893123369674842015-08-25T02:16:43.732-07:002015-08-25T02:16:43.732-07:00This comment has been removed by the author.The Froghttps://www.blogger.com/profile/04497592520102884086noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-7581076502178685962015-08-20T13:23:32.222-07:002015-08-20T13:23:32.222-07:00Late to respond to this, but from what I heard whe...Late to respond to this, but from what I heard when I called zipp with exactly this question. Optimized for dry conditions means they desinged it with dry conditions in mind, Supposedly it offers better grip in all conditions than their previous tires did (tires which I was very happy with in varying conditions)Jordanhttps://www.blogger.com/profile/11128814662634133125noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-57174903753962590632015-03-24T12:57:29.193-07:002015-03-24T12:57:29.193-07:00Tom,
Thanks for the update on the new Zipp offerin...Tom,<br />Thanks for the update on the new Zipp offerings! <br /><br />On the topic of other updated tires, I have heard from my LBS that Specialized has added some more puncture protection to the S-Works Turbo clinchers. I'm hoping it hasn't slowed them down too much.<br /><br />If you don't have some to test I'd be happy to send you a set!<br /><br />Thanks!<br />-IanAnonymoushttps://www.blogger.com/profile/18140228035398312314noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-1813355126193368792014-12-22T10:53:03.287-08:002014-12-22T10:53:03.287-08:00Tom,
Thanks so much for your posts and the time y...Tom,<br /><br />Thanks so much for your posts and the time you take for testing and writing. <br /><br />I am going to put your test results to work via what I expect to be big improvements in a 12 or 24 hr ride. In particular, I had handcycled a 12 hr event with gatorskins (0.0058). By going to Cont. 4000S II on the next event, I expect quite an improvement. With handcycling at 16-17 mph, a cyclist will have far more of an improvement with a better rolling resistance tires as compared to a legged cyclist moving along at 25+ mph. I would not have thought that the Crr would be so different between tires without reading your blog. <br /><br />I have little choice in tires given that my wheels are 650C clinchers but the Cont. 4000S II tire is available in a 650C 23mm.<br /><br />Question: I have 3 wheels (delta design). Should I expect that the relative rolling resistance between tires holds for 3 wheels as it does for 2? I expect that the rolling resistance is less per tire (less weight going to each wheel) and probably less in total for all three wheels as compared to two wheels since less weight per tire would probably allow for less deformation of the tire?Bruce Chasehttps://www.blogger.com/profile/12547917183274805275noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-57232285119125432672014-10-10T07:55:49.573-07:002014-10-10T07:55:49.573-07:00Hi Tom
Would be great if you could add the CRR of ...Hi Tom<br />Would be great if you could add the CRR of Conti Supersonic and Tubular Podium.<br /><br />And if the 26,8mm is really negative on aerodynamics if mounted on a 27mm Firecrest ProfileAnonymoushttps://www.blogger.com/profile/18405079910823225195noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-4578015321974324082014-09-11T00:43:50.950-07:002014-09-11T00:43:50.950-07:00Hi Tom,
Would you be interested in a new GP TT and...Hi Tom,<br />Would you be interested in a new GP TT and a new GP 4000S II from me ? Free of charge of course, I want to try and do my own testing at home with your protocol but in the mean time I'm happy to send you these two tires to complete your chart if you are interested ?<br />Pierre-Yves Facomprez - Look Cycle - http://pyfrides.wordpress.com/Anonymoushttps://www.blogger.com/profile/10146804040419564974noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-61209939003754808922014-09-10T03:57:15.969-07:002014-09-10T03:57:15.969-07:00Tom, I can't tell you how much I appreciate yo...Tom, I can't tell you how much I appreciate your independent testing. Thanks for making me faster!Cody Bealshttps://www.blogger.com/profile/09963657383140335035noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-64234556510813033152014-09-08T19:13:40.137-07:002014-09-08T19:13:40.137-07:00I'm not sure myself what they mean by that.I'm not sure myself what they mean by that. Tom Anhalthttps://www.blogger.com/profile/08175472546482777614noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-14037914183705011982014-09-08T19:07:47.278-07:002014-09-08T19:07:47.278-07:00Tom, Love your work as always. Can you enlighten u...Tom, Love your work as always. Can you enlighten us at all about what "optimized for dry road conditions" really means? Or I guess I can just email Zipp. How bad will they be (tubulars in my case) in the wet for road racing? My uneducated guess is either the compound is not very soft or the tread pattern is designed for aerodynamics not water evacuation (looks like the pattern is backwards of most treads, which is better for aerodynamics, or so I read).Nigelhttps://www.blogger.com/profile/17828364966337127828noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-69225231430183631102014-09-08T15:33:54.255-07:002014-09-08T15:33:54.255-07:00Doh! Thanks for the catch. Updated. That's a g...Doh! Thanks for the catch. Updated. That's a good idea about the puncture belt, however sometimes that's not always known (for example, I couldn't figure out why the tubeless version of the Schwalbe IM clincher was faster than the straight clincher version w/latex tube until the rep at IB happened to mention the Schwalbe tubeless tires all omit the puncture belt), and they all aren't created equal either.<br /><br />I think I'll leave it to the reader to figure out what's what on that front and what level of "comfort" they have in running a particular tire.Tom Anhalthttps://www.blogger.com/profile/08175472546482777614noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-64466503639313528342014-09-08T14:59:31.788-07:002014-09-08T14:59:31.788-07:00Tom, great work as always! Things are really look...Tom, great work as always! Things are really looking interesting for the cycling tire industry. <br />Idea for the spreadsheet. How about adding a column after C to denote if a tire has puncture belt/protection or not. I think that would be good info for all the data.<br />Oh, just noticed that you have the wrong data for "Old Zipp Tangente 23C Tubular = .0034", should be .0045 per the graph.Dmachttps://www.blogger.com/profile/17535220769083924567noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-955878937288709972014-09-08T12:37:36.132-07:002014-09-08T12:37:36.132-07:00The Radiale is actually quite different in that th...The Radiale is actually quite different in that the bias angle of the plys is significantly steeper (i.e. more like a radial car tire), and that it seems like there is quite a thick layer of rubber on the sidewalls. That tire's compound also seems to feel quite soft. Only one of those 3 things would tend to make a tire low Crr (the ply direction) and that actually makes the steering less stable. I'm really not sure what Vittoria was trying to accomplish with that tire.Tom Anhalthttps://www.blogger.com/profile/08175472546482777614noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-649442338094090122014-09-08T11:28:00.577-07:002014-09-08T11:28:00.577-07:00based on the 220tpi construction and zipp's hi...based on the 220tpi construction and zipp's history with vittoria, I would have expected this tire to be pretty similar to the Pro Radiale; however, the pro radiale did very poorly on your RR test. <br /><br />I wonder what changed, and if vittoria will make similar changes to their diamante line of tires to make them perform better. sxeveganhttps://www.blogger.com/profile/14401266248378336601noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-17964816785037487592014-09-08T07:46:18.371-07:002014-09-08T07:46:18.371-07:00Hi Steve,
There's a couple reasons. First, th...Hi Steve,<br />There's a couple reasons. First, that's the SAME tire I've been using all along in my testing, so it makes for a good "control". Secondly, I've been told by sources at Conti that the only difference between the GP4000S I have and the GP4000S II is the addition of the colored ink on the sidewalls, and thus there should be no difference in Crr. I also just haven't gotten my hands on one yet ;-)Tom Anhalthttps://www.blogger.com/profile/08175472546482777614noreply@blogger.comtag:blogger.com,1999:blog-6080071290235905056.post-23562411248024346692014-09-08T05:10:25.567-07:002014-09-08T05:10:25.567-07:00Tom, thanks for your work. Question: Any reason w...Tom, thanks for your work. Question: Any reason why you don't use the newer S II version of the Conti GP 4000 S as your benchmark? Thanks, SteveSteve@intheknowcycling.comhttps://www.blogger.com/profile/16189668733741295992noreply@blogger.com