Porte numbers on Col d'Eze

rob churchill

Pross wrote:

RichN95 wrote:

Pross wrote:

You note that the measurements are flawed and there is one massive one there. They assume a weight of 140lbs but Froome's weight according to the official team website is 69kg and when you add on 7kg for the bike you end up with a total weight of about 167lb.

Working backing from the above calculation the wattage would be 394w and with the 76kg total weight the w/kg would drop to about 5.2. Mind you, those scoundrels at Sky are probably weighing all their riders with ballast to make their numbers better (this will no doubt be reported as fact on Twitter shortly). That would surely be better than easing up to make your numbers look more believable and risk losing!

EDIT getting my riders confused :oops:

Still Porte is 62kg so for combined weight of 69kg he'd have 5.7 w/kg which seems pretty much what you'd expect (slightly low)

I don't think you're meant to include the bike weight in W/kg calculations.

Even so, 6.2 for a 19 minute effort isn't that big a deal.

Really? Seems odd. I agree that 6.2 seems reasonable over that time as does less than 400w total power.

When working back from a VAM & gradient factor to get the watts produced by the rider, I would have thought one would surely have to use the combined weight of the bike and rider. But having established the watts produced by the rider, you'd then divide by his bodyweight only to get a meaningful physiological stat. Does that make sense?

dave_1

RichN95 wrote:

Dave_1 wrote:

Kelly on a vitus 979 weighing 19lbs...frame that is compared to Ritchie's Pinarello at 14lbs..+what does a group set, wheels and components weigh now compared to before? Another 3lbs off. So, at a guess Kelly has 7lbs extra weight..3kg or maybe 3.5 kg weight on Ritchie to get him equal to Kelly's bike?

On the 9.6km last week
Ritchie last weekend in 19 minutes 17 seconds...
Kelly 27 years ago did Col d'eze time 19 minutes 45 seconds for 9.5km

If you stuck 3kg on Ritchie's bike, would have beaten the time of Kelly? When no EPO was available
.

With regard to Kelly's ride, while the distance is listed as 9.5km is was in fact the exact same 9.6km course, it's just that back then everything was listed to the nearest half kilometre[/quote
Rich if it was exact same distance then it shows the best in the 1980s would run Porte very close. Porte vs Kelly