Join Date: Dec 2003
Location: Tucson, AZ
Bikes: Custom Zona c/f tandem + Scott Plasma single
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Had a custom built Assenmacher (Mich., USA) back in 1977 with similar design.
Had double set of twin laterals; had no top tube for stoker as she is under 5 ft. tall + a bent rear seattube for shorter (60-1/4 inch) wheelbase.
Built out of Reynolds 531 double butted racing tubing; put 64,000 miles on that fast/light machine!
Never heard of Zini, but then most folks never heard of Assenmacher either.