tag:blogger.com,1999:blog-445857065058617167.post7261909266323556378..comments2022-04-10T09:43:29.454-07:00Comments on Life of An Amateur Cyclist: Cheapest way to get faster on your bikeRené Rasmussenhttp://www.blogger.com/profile/14967202893694419947noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-445857065058617167.post-69731972190961515562016-08-16T14:28:16.066-07:002016-08-16T14:28:16.066-07:00This I belive is going to be the optimum size tyre...This I belive is going to be the optimum size tyre for these wheels t for this car. <a href="http://cheaptyresandwheels.com.au/" rel="nofollow">Cheap Tyres Milperra</a><br />jadehttps://www.blogger.com/profile/13835847777966515522noreply@blogger.comtag:blogger.com,1999:blog-445857065058617167.post-237673080144545922013-06-27T08:43:40.342-07:002013-06-27T08:43:40.342-07:00Asad: The numbers used here was the measured numbe...Asad: The numbers used here was the measured numbers of the tests, not any bad calculations.René Rasmussenhttps://www.blogger.com/profile/14967202893694419947noreply@blogger.comtag:blogger.com,1999:blog-445857065058617167.post-34272875504524158132013-06-24T13:46:51.187-07:002013-06-24T13:46:51.187-07:00There is always a difference between theory and pr...There is always a difference between theory and practice, as this example so ably demonstrates. The measured power requirements are correct. Marchantsevenhttps://www.blogger.com/profile/14586372303151234108noreply@blogger.comtag:blogger.com,1999:blog-445857065058617167.post-42793741937756204402013-06-24T12:21:50.691-07:002013-06-24T12:21:50.691-07:00Some of your numbers are a bit off.
Assuming your...Some of your numbers are a bit off.<br /><br />Assuming your 4,5W for the Zipps at 30km/h, at 40km/h they require 4,5*(40/30)^3 = 10,7W rather than the 11,0W you state. Similarly, at 50km/h, they require 4,5*(50/30)^3 = 20.8W rather than 23,3 as you write.<br /><br />The force required to overcome aero drag goes as v^2, but the power goes as v^3 (which is what you would use if you want to compare to the linear relationship for power required to overcome rolling resistance vs. velocity).<br />Anonymousnoreply@blogger.com