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Miche seatpost clamp - selectable for carbon?

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Miche seatpost clamp - selectable for carbon?

Old 12-31-14, 06:46 PM
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springs
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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)
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Old 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.
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Old 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.
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Old 01-01-15, 07:27 PM
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Originally Posted by springs View Post
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.
OTOH - it's a bit too much of a good thing. Works great, but so would a simpler offset slot clamp.
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Old 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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