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  • Two inches eccentric. Burrows realised it does not matter if the two wheels are not perfectly co-linear, for a couple of inches disparity is trivial in proportion to the wheelbase. That then allows him to dispense with a rear triangle, mounting the back wheel off a monolithic tube that will be stiffer for the given amount of material used in making it than any simple triangle could be. It may look like variation for its own sake but the major moves here are motivated by engineering.

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