Question: I recently purchased some collapsible trekking poles ([Komperdell Ridgehiker](http://www.mec.ca/product/5031-555/komperdell-ridgehiker-cork-powerlock-compact/?q=komperdell), made in Austria) and found them quite useful in terms of being able to extend or retract them slightly for going up and down hill when my knees are most strained with my 30-40 pound pack.

A major issue with the design was that it snapped at the plastic rings that make up the joints while going downhill with only a 15 pound pack and fast pace, with conscious effort to plunge them in a way where I would not bend them too much while moving forward.

If I am to be abusing the poles like this (absolutely am looking for them to be strong enough for the rare slip somewhere at a minimum) should I look for much pricier ones with stronger joints, or go with fixed? And if I choose fixed, should I size them at a 90° bend or should I size them for say uphill climbing or slightly longer for downhill and possibly adjust the hand loop much longer for when I use them for uphill? Or is the benefit of collapsing mainly for packed size and not much is gained by adjusting them for the incline?

Answer: 
I don't know of what quality are the poles which you are using, but it's a fact that the better the quality, the better the joints. It's one of the most important components of the price.

For me, a good pair of poles from BlackDiamond behave pretty well under my 90 kg weight with a 30 kg backpack, which totals in 260 pound. This is a good side: yes, expensive poles should help you.

The bad side is that trekking poles are expendable. If you happen to walk on scree, or your are heavy, or you are just unlucky, you poles may live for only a week or two on intensive trekking. Then a tiny accident happens and you find that now you have 3 poles instead of 2. And collapsible poles are weaker than regular ones. Or heavier, or both. And definitely more expensive.

Now, some shopping advice for non-collapsible poles. You can get the most of the poles in 2 scenarios:

1. Going downhill - they protect your knees from shock
2. Walking on horizontal or slightly inclined ground - they let you move longer by evenly distributing the stress and move faster by keeping better balance.

My experience is that when going up, they don't help that much - your legs are much stronger than your arms anyway. And if you are on a really steep slope, you can hold them together with two hands - the same technique as with an [alpenstock](http://en.wikipedia.org/wiki/Alpenstock).

So if I was going to buy non-collapsible poles, I would go for the size which you are comfortable with walking on the level ground - this will cover most of the scenarios.

Ps. Please note, that I don't have much experience of walking with non-collapsible poles in summer - the conclusions are drawn from observations of collapsible poles usage.
**Collapsible poles, compared to fixed poles**

* Easier to fit in luggage.
* Easier to fit in the side pockets of backpacks when doing something that requires two hands, for example river crossing.
* Can be loaned to other people who are of different height to you.