Understanding "grades"
#1
Understanding "grades"
X-cuse me, I just move from panckake flat Florida to hilly Arkansas and I'm at a loss with "grade measurement". I did my first ride today and there's a killer hill right in front of the apt complex. really fun going down, frustrating going back up.
My doubt is that the "my tracks" android app is saying that the min grade was -11% and the max grade was 7%. I'm gonna assume that the -11% was the killer hill going down. But why isn't there a max grade of +11%? Was it because I took so long going back up that it didn't register it?
Oh and is an 11% grade supposed to feel like a wall or am I just to fat for this sport?
My doubt is that the "my tracks" android app is saying that the min grade was -11% and the max grade was 7%. I'm gonna assume that the -11% was the killer hill going down. But why isn't there a max grade of +11%? Was it because I took so long going back up that it didn't register it?
Oh and is an 11% grade supposed to feel like a wall or am I just to fat for this sport?
#2
commu*ist spy
Joined: Aug 2012
Posts: 4,462
Likes: 5
From: oregon
grade = slope of the hill
so if y is your elevation displacement, and x is your horizontal displacement, grade would be y/x*100%. 7% vs -11% just means you were on the 7% climb for a greater distance than you spent on the -11% descent.
so if y is your elevation displacement, and x is your horizontal displacement, grade would be y/x*100%. 7% vs -11% just means you were on the 7% climb for a greater distance than you spent on the -11% descent.
#3
X-cuse me, I just move from panckake flat Florida to hilly Arkansas and I'm at a loss with "grade measurement". I did my first ride today and there's a killer hill right in front of the apt complex. really fun going down, frustrating going back up.
My doubt is that the "my tracks" android app is saying that the min grade was -11% and the max grade was 7%. I'm gonna assume that the -11% was the killer hill going down. But why isn't there a max grade of +11%? Was it because I took so long going back up that it didn't register it?
Oh and is an 11% grade supposed to feel like a wall or am I just to fat for this sport?
My doubt is that the "my tracks" android app is saying that the min grade was -11% and the max grade was 7%. I'm gonna assume that the -11% was the killer hill going down. But why isn't there a max grade of +11%? Was it because I took so long going back up that it didn't register it?
Oh and is an 11% grade supposed to feel like a wall or am I just to fat for this sport?
#5
PS: What's the grade on Pcad's MT Doom?
#8
moth -----> flame


Joined: Dec 2007
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From: SF Bay Area
Bikes: 18 Tarmac SL6, 11 CAAD 10-4, 07 Specialized Roubaix Comp, 98 Peugeot Horizon
Grades measured descending are often less accurate as you have less sampling of the slope as you're moving more quickly, I tend to believe grades measured uphill a little more.
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BF, in a nutshell
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#9
#10
Here is the nastiest climb I've tried.
I *might* have been able to do it if it was paved.
But the damned thing is narrow as hell, loose gravel, and full of drainage ruts.
IIRC, my Garmin was indicating over 20% near the top.
I *might* have been able to do it if it was paved.
But the damned thing is narrow as hell, loose gravel, and full of drainage ruts.
IIRC, my Garmin was indicating over 20% near the top.
#11
11% I consider a decent climb. 15% starts getting some respect. 20% I start cursing. 25% I start begging for easier gears and bigger lungs.
This is all relative to the distance of course, this weekend I'll be doing an 8 mile climb that averages around 11% or so for the last three miles. That thing sucks!!!
This is all relative to the distance of course, this weekend I'll be doing an 8 mile climb that averages around 11% or so for the last three miles. That thing sucks!!!
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I may be fat but I'm slow enough to make up for it.
#13
Senior Member
Joined: Aug 2008
Posts: 549
Likes: 82
From: South Central PA
Bikes: Focus Arriba, Specialized Roubaix Expert, Bianchi Impulso Allroad
I was excited that one of the climbs I do is a Strava segment, which shows elevation gain. But only 387 fteet in 1 mile. That's only 7.3% over the mile climb, pretty pitiful, especially the way it made me hurt (at first). But there are steeper sections, some false flats, and one slight downhill portion. I wanted to figure out how steep the steepest section is, but never plugged it into mapmyride, etc.
Edit: so I plugged the climb into mapmyride, and it turns out one section just before halfway is 18%. That 1/10 mile is the part that kills me, and I have another half mile to go to the top.
Edit: so I plugged the climb into mapmyride, and it turns out one section just before halfway is 18%. That 1/10 mile is the part that kills me, and I have another half mile to go to the top.
Last edited by redcon1; 05-08-13 at 06:00 AM.
#14
Senior Member
Joined: May 2011
Posts: 1,421
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From: NoVA
Bikes: Specialized Allez Sport
Any grade in the double digits at any good distance always made me wonder why I even got on it in the first place. But as soon as I finish the climb, I can't wait to try it again. Such a weird thing.
#15
John Wayne Toilet Paper
Joined: Feb 2006
Posts: 1,952
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From: Roanoke
Bikes: BH carbon, Ritchey steel, Kona aluminum
Slow down, sparky. 11% over 8 miles is roughly 4600ft. There is no climb in WV that big, given that the high point is 4863 and the low point is 240 and these two points are separated by 150mi.
#16
Here is the climb. 8.7 miles, 2,760 feet climbing. Elevation difference 2,385 feet.
https://app.strava.com/activities/12332661#210699829
After looking closer the last 2 miles averages 11%. The sign says next three miles though. Oh well.
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I may be fat but I'm slow enough to make up for it.
#17
John Wayne Toilet Paper
Joined: Feb 2006
Posts: 1,952
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From: Roanoke
Bikes: BH carbon, Ritchey steel, Kona aluminum
If you notice I said the last three miles averages 11%.
Here is the climb. 8.7 miles, 2,760 feet climbing. Elevation difference 2,385 feet.
https://app.strava.com/activities/12332661#210699829
I love it when people try to catch me in a lie.
Here is the climb. 8.7 miles, 2,760 feet climbing. Elevation difference 2,385 feet.
https://app.strava.com/activities/12332661#210699829
I love it when people try to catch me in a lie.
#18
You Know!? For Kids!



Joined: Apr 2005
Posts: 6,166
Likes: 29
From: Just NW of Richardson Bike Mart
Bikes: '05 Trek 1200 / '90 Trek 8000 / '? Falcon Europa
Just slightly beyond vertical most days, but MT Doom is of the uber rare "RVG" class of climbs. Only two other Randomly Variable Grade climbs are known to exist and they are both located within Area 33, the secret US cycling development facility.
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#19
I'll be doing this climb over the weekend as well. I would like to do them both in one day, have to see how the knees and quads feel.
https://app.strava.com/activities/12050627#207100473
https://app.strava.com/activities/12050627#207100473
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I may be fat but I'm slow enough to make up for it.
#20
Sorry, I changed it after I realized that I was wrong after all.
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I may be fat but I'm slow enough to make up for it.
#22
After re-reading it he wasn't disputing what I said.
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I may be fat but I'm slow enough to make up for it.
#23
John Wayne Toilet Paper
Joined: Feb 2006
Posts: 1,952
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From: Roanoke
Bikes: BH carbon, Ritchey steel, Kona aluminum
#24
Overpasses?
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I may be fat but I'm slow enough to make up for it.
#25
John Wayne Toilet Paper
Joined: Feb 2006
Posts: 1,952
Likes: 0
From: Roanoke
Bikes: BH carbon, Ritchey steel, Kona aluminum
I'll be doing this climb over the weekend as well. I would like to do them both in one day, have to see how the knees and quads feel.
https://app.strava.com/activities/12050627#207100473
https://app.strava.com/activities/12050627#207100473




