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I believe the thickness remains constant, and that the flex rating comes from the level of compression used to create the stick. Longer, harder compression yields a stiffer stick, whereas, a shorter, softer compression makes a whippier stick. I'm not an engineer but I think that's how. I know in wood sticks, they use stiffer fiberglass..but not necessarily more of it, so I guess that's the same for graphite. Not more, just stiffer areas.

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Flex is just based on the amount of weight needed to be applied to the stick to get it to flex to a certain degree..

The use of materials (and quantities thereof) applied usually determines the flex of the shaft. ie) more material wrap for a stiffer flex and less (or different) for a more flexible stick.

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The wall thickness remains the same but the number of layers of composite material, the directions of the fibres and the amount of filler resin is changed. Composite materials are two materials bonded together in the case of hockey sticks its different types of fibres and different types of polymer resins. If you increase the number of fibres you decrease the amount of resin and since the fibres are stronger the stiffness increases.

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The wall thickness remains the same but the number of layers of composite material, the directions of the fibres and the amount of filler resin is changed. Composite materials are two materials bonded together in the case of hockey sticks its different types of fibres and different types of polymer resins. If you increase the number of fibres you decrease the amount of resin and since the fibres are stronger the stiffness increases.

All joking aside--That is one of, if not the best post I have ever read explaining flex. Excellent Job.

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The wall thickness remains the same but the number of layers of composite material, the directions of the fibres and the amount of filler resin is changed. Composite materials are two materials bonded together in the case of hockey sticks its different types of fibres and different types of polymer resins. If you increase the number of fibres you decrease the amount of resin and since the fibres are stronger the stiffness increases.

So is it right to assume that a stiffer stick would be more durable than a whippier stick?

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Thanks fer the compliment

Generally carbon fibres are strong but brittle and resins are not as strong but more flexible and durable. If you add more strong fibres you end up reducing the durability since theres less resin. Generally speaking if you were working with just one type of fibre and one type of resin, increasing the stiffness by changing the ratio of fibre to resin will make the stick less durable.

But you can also increase the stiffness by changing the angles that the fibres are arranged in or by using different types of fibres. Theres lots of engineering that goes into those fancy sticks :D

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So is it right to assume that a stiffer stick would be more durable than a whippier stick?

Eazy.. can I get an explanation? Here I am, ~5'5 ~120: I cannot flex a 120 for my life depended on it. I go flex a Jr. Syn and it bends in half, almost breaking. What's the theory in that?

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We had this discussion a little while ago. It's a little difficult to explain. I think of it in extremes. A stick with say.... 1 flex. Will be able to touch the ground and not break, a stick with a 400 flex will break once it budges. It's just a matter of getting it to flex that much. There was alot of discussion on both sides, and to be honest, I thought it was the same as you.. flexier = more vulnerable, but it was basically proven that it isn't true. Basically for us, as players and the scales were given, neither is unbreakable and the difference from brittle to brick is not very much. Junior sticks usually aren't as strong either because the materials aren't as good as their senior counterparts.

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Junior sticks usually aren't as strong either because the materials aren't as good as their senior counterparts.

Thinner shaft walls as well on juniors, most of the time

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