7% gradient speed for Professional Cyclist?
Ronko
inherently risky to cyclists as designed. This project will use mini-
roundabouts and force cyclist to "take the lane" as a traffic mitigating
and calming measure. The Designer and the US Dept of
Transportation list bike speeds as 12-20mph as useable speeds where
this can work. All these mini-roundabouts are on level ground, so the
12-20mph is realistic.
The design I am examining is on a narrow, winding street with a 7%
gradient. This is a long grind, I'm an average cyclist and usually do
this at about 5-6mph. Some cyclist will go faster, some slower.
Professional level Peloton racers, singley, go up 7% grades under
races conditions at about what speeds, if this can be estimated?
thanks to all!
DirtRoadie
OK, obviously there are LOTS of factors that come into play but
14 mph is very realistic sustained pace for a top level pro climber on
a grade like that.
DR
thirty-six
Depends on the length of the hill to climb his requirements as regards
the race and the physical condition he is in at the moment, but
anything up to a mile (on a 7% grade) may have little effect on his
average level riding speed, so could be 25-30mph maximum.
If that rider is required to stop at each roundabout, that speed
will diminish to something less than 20mph. As a WAG, it's about
14mph for continuous climbing.
Phil H
14mph for an average pro for 20 min.
16mph for a world class pro for 20 min.
5.67 watts/kg for a UCI div1/11 pro. For a typical 66kg rider this
will be 374 watts for a sustainable 20 min effort.
At 20mph = 8.94 m/s which translates to a vertical ascent speed of .
626 m/s. For a 66+7 kg rider plus bike, this will be 447 watts.
We are a bit short on power at this speed.
14mph would be 313 watts which leaves a little over 60 watts for drag
and RR, doable if the guy is sucking wheel.
This is for a 20 minute effort, a world class pro develops 7 watts/kg
so a 66kg rider develops 460 watts. This would be closer to 16mph.
Power per kg data via Andy C
Phil H
thirty-six
> On Mar 17, 2:27 pm, Ronko <ronkreu...@gmail.com> wrote:
>
>
>
> > I'm doing some research for a local new road project that me be
> > inherently risky to cyclists as designed. This project will use mini-
> > roundabouts and force cyclist to "take the lane" as a traffic mitigating
> > and calming measure. The Designer and the US Dept of
> > Transportation list bike speeds as 12-20mph as useable speeds where
> > this can work. All these mini-roundabouts are on level ground, so the
> > 12-20mph is realistic.
>
> > The design I am examining is on a narrow, winding street with a 7%
> > gradient. This is a long grind, I'm an average cyclist and usually do
> > this at about 5-6mph. Some cyclist will go faster, some slower.
>
> > Professional level Peloton racers, singley, go up 7% grades under
> > races conditions at about what speeds, if this can be estimated?
>
> > thanks to all!
>
> 14mph for an average pro for 20 min.
> 16mph for a world class pro for 20 min.
>
> 5.67 watts/kg for a UCI div1/11 pro. For a typical 66kg rider this
> will be 374 watts for a sustainable 20 min effort.
> At 20mph = 8.94 m/s which translates to a vertical ascent speed of .
> 626 m/s. For a 66+7 kg rider plus bike, this will be 447 watts.
> We are a bit short on power at this speed.
> 14mph would be 313 watts which leaves a little over 60 watts for drag
> and RR, doable if the guy is sucking wheel.
What if he's sucking nitroglycerine?
Phil H
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
He'll blow up............. literally.
Phil H
Zenon
Who gives a shit? Stop wasting your time.
Nagurski
It's an interesting question (for a change), followed by an
interesting analysis, you stupid fuck.