bicycle prototype by paolo de giusti experiments with wheel-ratio ergonomics

bicycle prototype by paolo de giusti experiments with wheel-ratio ergonomics
all images courtesy of paolo de giusti

large rear wheels are common for bicycles used in velodromes. the ’36/28 postale’ by designer paolo de giusti, takes a similar setup and introduces it to every riding needs. the focal point is the 36 inch rim which is the biggest available size on the market today. it is accompanied by a 28 inch front wheel that surprisingly doesn’t radically change the positioning of the rider. the purpose of the design was to exhibit aggressive riding placements typically found in racing, while still maintaining correct ergonomic measurements not far from a standard bike. 

the rear 36 inch wheel is biggest available on the market

the ’36/28 postale’ has a sturdy frame, fat tires and an eight-geared internal rear hub. de giusti built the structure himself with a 3D printer, a mix of ABS materials and PVC tubing. the commercial frame could have a similar layout using 3D printed titanium joints and carbon fiber tubes, or could be built in a traditional manner with welded aluminum tubes.

the handle bars include LED lighting the fat rear tire  the frame is double reinforced to handle the large wheels the internal eight geared rear hub detailed decals by paolo de giusti diagram showcase the similar geometry with a racing bike