Lattice forged hinge those in the know understand that a folding bicycles success lies mainly with its hinge dahon have devoted years of rnd to refining our lattice forged hinge the end result is feather light but a heavyweight in strength and performance dahon achieves this through cold forging and cnc tooling including stainless steel and brass components to stand up to all weathers and wear and tear 8 speed drivetrain set up with the shimano altus 8 speed rear derailleur and the matchin