Your height, inseam and weight are all taken into account - even the possibility that you'll be toting around a toddler in a child seat on the rear rack is considered in the equation that decides the final shape of the frame.

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"When you do an internet search your data goes into a data centre and the information wanted might not be on just one chip or even one rack of chips, " he told the BBC.

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"That's the kind of thing I should be focusing more on, rather than that my jeans come from the back of the rack rather than the front, " she said.

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You'll also be hard-pressed to find a safari on a clearance rack, but if you want to do it for the lowest price possible, go during the hotter, rainier season in southern and central Africa between November and February.

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