Originally Posted by
jbchybridrider
"Ha" 188 over here and the government would say "o" we calibrate our speed cameras you must have been doing 188 that'll be $400 thanks sir.
Your a stickler for statistics are'nt you, I still cant work out how to convert my stats to watts.
I looked at those power wattage computers and damm there expensive. The hubs and building a whole new rear wheel actually looks like the best option to me.
It isn't a speed camera actually ... it's more like a speedsign that informs you of your speed ... weird concept but apparently it slows people down (not me I always try to beat it
)
Investing thousands of dollars in a wattage meter seems over the top for anyone but an elite timetrail racer ... I use this calculator that was made by a university professor of Gent who also likes cycling and has a whole site about cycling and physics:
http://www.fietsica.be/hoesnel.htm
Scroll down to the calculator and fill in:
"uw massa" = "your weight"
"massa van je fiets" = "weight of your bike"
leave "wielmaat" on "racefiets" ... it means you ride with 700c wheels.
"band" = "tyre" ... select "clincher 23c" for 23's or "gewone band" for 35's
Then ... it says "Vul je gemiddelde snelheid op 20 min in".
Here you fill in your average speed over 20 minutes on a flat course and with no wind in a semi-upright "hoods riding" position.
It then tells you your maximum aerobic power output and also your weight specific output in Watts per kilogram (W/kg) and your frontal area specific output in Watts per square meter (W/mē) ... these are all simple calculations but they are pretty accurate actually
It then also tells you how fast you could climb some of the famous hills of the "tour de france"
The W/kg number is what defines your hill climbing abilities ... a bit further in the article it says that Armstrong's W/kg was 6.5
The W/mē number is what defines your time trail abilities ... it says Armstrong's W/mē was 1185.
Have fun with it