Hills ???

[burncycle]

I hear in the forums talking about hills being 22% or 1 to 7.
How are these worked out ?

 

[flecc]

That 1 to 7 is actually 1 in 7. That means for every seven units of distance, the slope rises by one unit, such as 1 foot rise after 7 feet.

The percentage figure is that second part divided into 100. Thus a 1 in 7 means that if you divide 100 by the 7, the answer is roughly 14, therefore 14%.

Examples:

1 in 5 is 20%

1 in 8 is 12%

1in 10 is 10%

etc.

In other words, it's the percentage of rise in a distance, or 14/100ths in the first case, so just a way of expressing hills as a single figure. I often show both to suit others preferences.
.

 

[burncycle]

Over the head and beyond !!!
Can you work out a hill based on 2 references of feet based on the distance it covers.
i.e point 1 say 100 feet, point 2 say 450 feet. Distance between these 2 points say 1 mile.

 

[flecc]

Over the head and beyond !!!
Can you work out a hill based on 2 references of feet based on the distance it covers.
i.e point 1 say 100 feet, point 2 say 450 feet. Distance between these 2 points say 1 mile.

Yes, the difference between those two points is 350 feet of elevation, over 1 mile, which is 5280 feet, so the answer is 5280 divided by the 350 to give the "1 in" figure,

5280/350 is 15.09, so it's 1 in 15. To turn that into the percentage way of saying it, divide 100 by that 15. That is 6.66 recurring, so 6.7% to be accurate, or more sensibly the nearest whole number, 7%.

Practice on a couple of easy ones and you'll soon get used to it.
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[burncycle]

Sorry im still thick !!!
"350 feet of elevation, over 1 mile, which is 5280 feet"
Where do you get 5280 from ?

 

[stokepa31]

As a surveyor I have my own very technical approach to measuring inclines

Flat = not buggered

1 in 10 = moderately buggered

1 in 7 = buggered

1 in 5 = completely buggered

1 in 4 = Cardiac Arrest

Its very accurate

 

[richard]

5280 feet in a mile

 

[burncycle]

ok that fine, didnt know.

 

[burncycle]

done my maths.
Commute to work 5miles with 500 foot climb as follows.
1 in 30
1 in 21
1 in 64
1 in 29
1 in 21

I think they will be fine dont you ?

 

[flecc]

You'll scarcely need to help the bike, e-bikes make light of those, and anything up to 1 in 10.
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