Jason Posted January 30, 2008 Share Heres a nice little power calculator. You can calculate the power you need to push when going up or on flat etc. You can fill in your bike weight, tubbies etc. For example: A rider weighing 72kg going up Hekpoort, a 2.7km climb with 187m elevation at a speed of 25kph he will need to push 477W .http://www.2peak.com/tools/powercalculator.phpWould you say this is accurate bruce? Or just a more or less figure? Jason2008-01-30 07:46:35 Link to comment Share on other sites More sharing options...
Guest colonel Posted January 30, 2008 Share This cant be right cause it means I pushed out power on Sundays race. Impossible. Link to comment Share on other sites More sharing options...
bruce Posted January 31, 2008 Share Sounds about right - gradient around 7% - 25km/h is not that slow! Link to comment Share on other sites More sharing options...
Baltazar Posted January 31, 2008 Share How important is it to know what power you push out ? Link to comment Share on other sites More sharing options...
Jason Posted January 31, 2008 Share Yup... But it's the power you will need to maintain while going up at 25kph that's a b*tch... I think that would be round about 7 - 8 minutes Think Lance averaged 23.5kph in the 2004 TDF up Alp d Huez, 15km's with 1100m ascent. According to the calculator he was pushing 442W for 39m 45s And that's without doping !! Jason2008-01-31 01:24:13 Link to comment Share on other sites More sharing options...
RABUBI Posted January 31, 2008 Share I checked it against wat I did in January up koewyns kloof, spot on. Link to comment Share on other sites More sharing options...
Jason Posted January 31, 2008 Share I checked it against wat I did in January up koewyns kloof' date=' spot on.[/quote'] Koewynspas in Graskop? If so I think the distance is 8km's? What's the specs of the climb? Ascent etc? I don't have my polar sw at the moment so I can't check. Link to comment Share on other sites More sharing options...
Turboman Posted January 31, 2008 Share I checked it against wat I did in January up koewyns kloof' date=' spot on.[/quote'] was it you Dodging traffic and bad roads on Zambezi this morning. You doing your hill intervals aggain Link to comment Share on other sites More sharing options...
Jason Posted January 31, 2008 Share How important is it to know what power you push out ? It's important to know because it's an accurate measure of the work you are doing or pushing through to the pedals.Not a power guru but trying to learn. BikeMax or bruce might have a more accurate answer for you or they may just tell you to try the search function .I need to seriously get a PT for my racing wheels Link to comment Share on other sites More sharing options...
dfm1 Posted January 31, 2008 Share I checked it against wat I did in January up koewyns kloof' date=' spot on.[/quote'] Its spelt Kowyn's and riding up in ur big blade darnt count, dont give away ur secrets now Link to comment Share on other sites More sharing options...
RABUBI Posted January 31, 2008 Share Yip, the one in graskop, 6.8% for 7.6km depending where you start and end. Link to comment Share on other sites More sharing options...
RABUBI Posted January 31, 2008 Share I checked it against wat I did in January up koewyns kloof' date=' spot on.[/quote'] was it you Dodging traffic and bad roads on Zambezi this morning. You doing your hill intervals aggain Yip was me taking a relaxing ride, intervals was on tuesday. Link to comment Share on other sites More sharing options...
Jason Posted January 31, 2008 Share Yip' date=' the one in graskop, 6.8% for 7.6km depending where you start and end.[/quote'] Well lets just say from the stop street at the bottom all the way to top where you roll over... But that sounds about right! Thanks! Link to comment Share on other sites More sharing options...
GIRR Posted January 31, 2008 Share Hmm... I had a look at it and it says if I get myself a 300g lighter bike frame it will only make 1 watt less t output o do the same speed as what i would normally do on a training ride.Kinda expected a bigger difference. Link to comment Share on other sites More sharing options...
fandacious Posted January 31, 2008 Share Heres a nice little power calculator. You can calculate the power you need to push when going up or on flat etc. You can fill in your bike weight' date=' tubbies etc. For example: A rider weighing 72kg going up Hekpoort, a 2.7km climb with 187m elevation at a speed of 25kph he will need to push 477W .http://www.2peak.com/tools/powercalculator.phpWould you say this is accurate bruce? Or just a more or less figure? [/quote'] Seems consistent with my power calculator on sporttracks. I used pompstasie as a measurement. distance = 3.34km, climb = 266, time = 12.19, I weigh 68kg, bike = 8.5kg. sporttracks shows 322watts, website shows 333watts. sporttracks takes wind and weather into account as well... either way, its around 4.7w/kg for 12mins... very interesting stuff Link to comment Share on other sites More sharing options...
fandacious Posted January 31, 2008 Share Hey... power gurus... how does 4.7w/kg translate? Do i need to spend more time on the hills and buy those Zipps? Do I sign up with barloworld tomorrow? Link to comment Share on other sites More sharing options...
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