In 700 x 32c, marathon is 640g and marathon plus is 800g according to schwalbe (http://www.schwalbe.co.uk/tour/marathon-plus/, http://www.schwalbe.co.uk/tour/marathon/). So with two, the difference between regular and plus is 320g. For reference, a Randonneur (also puncture protected) in 32c is 420g (http://www.vittoria.com/en/product/city-trekking/#product-143). So regular Marathons already weigh a metric fucktonne.
@lemonade started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
In 700 x 32c, marathon is 640g and marathon plus is 800g according to schwalbe (http://www.schwalbe.co.uk/tour/marathon-plus/, http://www.schwalbe.co.uk/tour/marathon/).
So with two, the difference between regular and plus is 320g.
For reference, a Randonneur (also puncture protected) in 32c is 420g (http://www.vittoria.com/en/product/city-trekking/#product-143).
So regular Marathons already weigh a metric fucktonne.