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amey
I'm putting a 650b roadish bike together around a charge plug frame. Not finished the build yet...
Have marathon 40-584 tyres in for now, they measure 38mm across as mounted on 28mm (external width) rims.. So a little narrow. I've had the 650b marathons since 2009 when they were literally the only slick in 650b available... Thousands of miles on them and still they refuse to show any wear at all ! 800g a piece is the penalty paid for that sort of protection though. TBH I think I need a slightly fatter tyre before the geo is correct