Do you love cycling and live in Adelaide? We are a community of more than 4000 cyclists - join us to share and connect with others.

Ever wondered how much effect losing weight from around the ballast (or from the bike) has on the time it take to climb Norton Summit, well here goes.

 

From cycle2max.com:

Norton Summit = 5.60 km

Average gradient = 4.9%

 

Using three examples from the list:

1. Brett Aitken:

time taken = 12 min 39 s

body weight + bike weight = 69 + 9 = 78 kg

Average speed = 26.6 km/h

Approx ave power = 390 W

 

a. Time (distance) saved of carrying 0.5 kg less (e.g. lighter wheels or empty 0.5 L water bottle) = 2.7 s (21 m)

b. Time (distance) saved of carrying 5.0 kg less (e.g lighter bike, wheels, no water bottles or tool kit & a diet) = 27 s (209 m).  Loss of significant bodyweight may reduce your power output.

 

2. Paul Smith

time taken = 18 min

body weight + bike weight = 93 + 8 = 101 kg

Average speed = 18.7 km/h

Approx ave power = 292 W

 

a. Time (distance) saved of carrying 0.5 kg less (e.g. lighter wheels or empty 0.5 L water bottle) = 4.4 s (23 m)

b. Time (distance) saved of carrying 5.0 kg less (e.g lighter bike, wheels, no water bottles or tool kit & a diet) = 43 s (223 m).  

 

3. Graham Page

time taken = 23 min 4 s

body weight + bike weight = 79 + 10 = 89 kg

Average speed = 14.6 km/h

Approx ave power = 190 W

 

a. Time (distance) saved of carrying 0.5 kg less (e.g. lighter wheels or empty 0.5 L water bottle) = 7 s (27 m)

b. Time (distance) saved of carrying 5.0 kg less (e.g lighter bike, wheels, no water bottles or tool kit & a diet) = 70 s (272 m).  

 

If you want to put your own numbers in use:

 

http://www.cycle2max.com.au/

and

http://www.analyticcycling.com/ForcesLessWeight_Page.html

 

Cheers chris

Tags: climbing., weight

Views: 1705

Reply to This

Replies to This Discussion

intermermesting........so you are saying i need a really, really light bike..............

I need to look at this calculator on a daily basis to remind my stomach lighter is faster

You mean my bike isn't ideal for going up the veloway?

 

:-)

 

Simon

So in theory, when I at 104kg road up Nortons on Sunday on my Mongoose 18kg the altitude of Norton should have dropped by about 3cm. Maybe if we had a big boys day out doing repeats we could flatten that hill.

I tried to remodel a small section of the side of Gorge Rd a few years ago. Even with my weigh it didn't move any perceptible amount.

Now you need to calculate if riding with a slightly heavier bike will help people lose weight, and how much... So for example, if you put up with the 500g heavier wheels and therefore have to work a bit harder, will you lose 5kg over a month or so.?! If so, I'd keep your money for the wheels and take the 5kg!

Bah!

As much as being fit and of good lung/heart condition is important I reckon it is all to do with the head... It hurts I'm gonna sit down... or... it hurts I'm gonna get to that next corner/rise/tree/crest.. whatever... The body is in the red but the mind is commanding!

Then you get there recoup for a moment and kick again - sweet!

I tend to agree Ross, obviously form a purely scientific POV weight has a big effect on climbing but I reckon it's how we deal with the mental challenge that determines how we climb on a particular day.

Sure, not uncommon to see the pros emptying excess water when heading up.. no doubt smart tactics..

Elite athletes can sustain a power output of about 400W

 

A moderately fit person can sustain 200W of power.

 

If you really want to go up hills fast a 1000+ CC motorbike is the way to go. :-)

 

Most of them weigh well over 150 KG

Don, 400watts up hill or just average wattage over a set distance?

 

I agree, the lighter you are the better coupled with strong cardio output e.g. heart / lungs as well mental attitude of Jens Voigt plus light bike = FYLIN

The literature I read was over 4000m on a track it was considered that 4 Km would be typical of what people can sustain for a prolonged period.

 

It seems likely that well trained people could achieve a lot more for a very short period such as a track sprint.

 

Obviously a well maintained bike will mean that more of the energy goes into moving the bike.

 

Even an under inflated tire will reduce efficiency.

RSS

Support our Sponsors

ad2

© 2014   Created by Gus K.

Badges  |  Report an Issue  |  Privacy Policy  |  Terms of Service