Thank you for purchasing through links and ads on this site.
OWC / MacSales.com...
diglloyd Deal Finder...
Buy other stuff at Amazon.com...
Upgrade the memory of your 2018 Mac mini up to 64GB
Handpicked deals...
$1299 $950
SAVE $349

$299 $199
SAVE $100

$950 $750
SAVE $200

$470 $470
SAVE $0

$4499 $2999
SAVE $1500

$200 $165
SAVE $35

$398 $248
SAVE $150

$4999 $4499
SAVE $500

$2199 $1999
SAVE $200

$2799 $2349
SAVE $450

$120 $120
SAVE $0

$3105 $2499
SAVE $606

$1998 $1298
SAVE $700

$249 $149
SAVE $100

$100 $60
SAVE $40

$2844 $2297
SAVE $547

$1099 $1019
SAVE $80

$899 $530
SAVE $369

$1199 $1099
SAVE $100

$1999 $1379
SAVE $620

$999 $949
SAVE $50

Climbing Speed Case Study for Everest Challenge Stage Race

Last updated 2011-03-30 - Send Feedback
Related: Everest Challenge, training

Air resistance is minimal for a steep climb, because speeds are very low. Therefore, there is a near-linear relationship between weight and rate of ascent (there are mechanical losses and some friction from tires, air, etc, but these losses are relatively small).

For the example, let’s assume a rider equipped as follows:

Rider: 176 pounds
Clothing and shoes: 4 pounds
Bike: 15 pounds
Water: 4 pounds
Helmet: 1 pound
TOTAL: 200 pounds

For this configuration, a 1% reduction in total weight means that 2 pounds must be dropped. It should result in nearly a 1% reduction in ascent time, assuming a steep ascent and quality gear.

Taking the Everest Challenge as an example, let’s assume 10 hours of climbing over 2 days out of a 14 hour race (there are somewhat flat intermediate sections after all).

10 hours = 36,000 seconds (3600 seconds per hour X 10)
1% savings = 360 seconds = 6 minutes

While 6 minutes might not seem like a lot for a 10-hour climb, it is common to see leading competitors clustered within a few minutes of each other. In other words, saving 2 pounds might mean 1st place or 5th place!

But what if the rider can drop 5 pounds of body fat, and 5 pounds of equipment weight by using a lighter bike, wheels, shoes, etc? That’s 10 pounds, and it means a full half hour saved. A half hour could mean 10 or 20 places! In short, weight does matter a great deal.

Total Weight
(pounds)
Weight Reduction
(pounds, %)
Potential Time Reduction
(minutes:seconds)
Comments
200 0, 0% 00:00  
198 2, 1% 06:00 Difference between light wheels and average ones
196 4, 2% 12:00 Difference between average bike and light one
194 6, 3% 18:00  
192 8, 4% 24:00  
190 10, 5% 30:00  
184 16, 8% 48:00  

World of Sigma and especially Sigma ART Lenses
View all handpicked deals...

GoPro HERO7 Silver
$299 $199
SAVE $100

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__