Sprint power! How off?

[Landim]

My friends, I've done a ride and a couple of sprints, one sitting and another full out.

The power seens fine on the entire ride, but I have friends saying my sprint output is way over the real.

Do I need to recalibrate?

Thank you.

[kaplanmaxe]

At the point where you hit your maximum watts (1529) it says you are going 33.7 mi/h up a 5.3% hill. Your second highest watts (1231) was at 33.7 mi/h on a 0.6% slope. If you are doing 2 sprints, one on a 0% grade and one on a 5% grade, and you want to go the same speed on both, it will obviously require much more wattage to do the same speed on the 5% hill than the 0% grade. For whatever reason, it looks like your tilt freaked out on the sprint when you hit 1529. I would suggest doing a Tilt cal again. Check that the mount is tight and not moving also. I am curious to see what Boyd will say.

[kaplanmaxe]

Make sure you check your starting elevation also.

[coachboyd]

The tilt looks to be pretty good on this. Question, was this a solo ride or did you ride with anybody else? It looked to be pretty windy this day. I didn't see anything outrageous about the numbers, I have friends who regularly hit close to 2000 watts in a sprint.

Let me know if this was a solo ride or it you did a lot of drafting. I have a couple small tweaks that I made but I want to know if they are based on good input.

[Landim]

Yes I just checked the mount, and it is tight.

The place I live here (Fortaleza - Brazil), is know for the KiteSurf, windsurf paradise. So you can see that the wind is really strong. I was riding with a couple of friends. I was drafting about 70% from the minute 36 to 2h20m(the other was from and back to home).

My doubt was because this friend of mine was saying tha Pagliarini only hit, 1700w, that cavendish only hit 1040W, and I know that I am not as strong as those guys, not even close, and I do know that they reach those numbers on very different conditions, but I lack the knowledge to explain to him that this is real. I will study more so I can understand those fundamentals.

Thanks a lot. This is an amazing device.

[coachboyd]

Sprinting is not all about how much power you can put out. It's about positioning, timing, momentum, luck, bravery, and confidence.

I do not have a great sprint by the numbers, on a really good day I can put out about 1200 watts. . .but I have won 6 field sprints already this year. I didn't win them in the last 200 meters though, it all starts with a few Km to go. The work there can make it so a rider with much lower watts can beat somebody who can put out massive watts.

I wrote an article about it, and used the iBike 3 software to compare 3 riders in the final 5 miles of a race this spring. You can read about it here:
http://totalcyclist.com/home/athlete-co ... orner.html