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London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
markairsy1
It doesn’t really need the panel or the rear frame from a structural perspective if the seat is in place, but it stops things coming out the back!
It’s a good point though. It’s a handy looking spot behind the seat for lock and chain, but I could cut that bit out and angle the back of the box if I don’t use it. Would probably take 1.5kg out the weight by doing that. It’s a question of if it’s worth the effort and whether I’ll notice 1.5kg on a total bike weight around 40kg!