Even if a stock bike fit me perfectly, no stock bike can change the diameter of the tubes and flex of the frame to suit my whims, but Seven can.

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The tubes are about three nanometres in diameter and six nanometres long.

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For both modes of crystal fibre, the pattern of holes is generated by stacking hollow glass tubes a millimetre or so in diameter to form a rod several centimetres thick.

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At San Onofre, each one stands 65 feet high, weighs 1.3 million pounds and has 9, 727 U-shaped tubes inside, each 0.75 inch in diameter.

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That changed in the mid-1980s, when microscopic sieves--spread throughout steel tubes 30 feet long and 4 to 5 inches in diameter--were developed to filter out undesirable elements before the whey is dried to a powder for use in food manufacturing.

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To get around this, researchers piped water through sealed tubes just 50 microns (millionths of a metre) in diameter, between individual layers.

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That changed in the mid-1980s, when microscopic sieves--spread throughout steel tubes that are 10 meters long and 10 to 12 centimeters in diameter--were developed to filter out undesirable elements before the whey was dried to a powder for use in food manufacturing.

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