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@sacredhart
I'm on a weight saving mission with the Brompton. How much do you think I would save switching from 5 speed rear wheel to single? I cant find any stats anywhere on the internetz.
Also if I went 2 speed can I choose any cog size of am I limited to set combos? It would be nice to retain a similair ratio as the 2 easiest gears on the 5 speed.
Kojak tyres are half the weight of the Marathons I have which seems an easy saving too.