Miche seatpost clamp - selectable for carbon?
12-31-14, 06:46 PM
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Miche seatpost clamp - selectable for carbon?
What is the theory of operation behind this adjustable carbon vs metal clamp? You can see that the carbon setting offsets the two gaps but how is this better than all the other clamps out there?
Miche X-Carbon Seatpost Clamp in Tree Fort Bikes Seatpost Parts (Road) (cat549)
Miche X-Carbon Seatpost Clamp in Tree Fort Bikes Seatpost Parts (Road) (cat549)
12-31-14, 06:56 PM
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When you tighten a clamp, the sides of the slot tend to dig in.
Think for a moment out an eggshell. If you palm it and squeeze evenly it's unbelievably strong. But dig fingers in one spot ant it breaks immediately. Likewise with CF posts. They cannot tolerate the local stress that clamp distortion can create. That's why for years it was SOP to turn the clamp so the slots didn't align. This design does that without the cosmetic "issue" of not having the clamp oriented so it looks right.
Think for a moment out an eggshell. If you palm it and squeeze evenly it's unbelievably strong. But dig fingers in one spot ant it breaks immediately. Likewise with CF posts. They cannot tolerate the local stress that clamp distortion can create. That's why for years it was SOP to turn the clamp so the slots didn't align. This design does that without the cosmetic "issue" of not having the clamp oriented so it looks right.
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01-01-15, 07:24 PM
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Got it. So this Miche does a triple good job....the clamp slot itself is offset from the slot in the seat tube, and the inner ring's slot is offset from both.
01-01-15, 07:27 PM
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Originally Posted by springs
Got it. So this Miche does a triple good job....the clamp slot itself is offset from the slot in the seat tube, and the inner ring's slot is offset from both.
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An ounce of diagnosis is worth a pound of cure.
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FB
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An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
01-01-15, 07:32 PM
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FB, I never gave this much thought. (I am still a few years from a carbon bike.) Just seeing your first post, my first thought was, shouldn't the clamp be a modified pipe clamp? No slots, uniform pressure. The challenge might be to have in inside layer that cannot support shear so no shear force is applied to the carbon fiber.
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