The aluminum alloy frame used on the Fuji Roubaix 1.3 disc is indeed the case...at the bottom bracket connection and used in conjunction with the tapered head tube,...the rods, seatposts and handlebars are all from Oval Concepts, they...
The seatpost slides into the seat tube and secures the saddle to the bicycle. ...The seatpost is usually made of aluminum or carbon. ...Offset and use a bolted connection system compatible with circular and oval saddle rails.
...Wrapped cardboard tube-"similar to the manufacturing method of toilet paper tube. It can be made into oval and rectangular shapes, but early experiments show...
The cylinder head cover is magnesium and has a thin wall design to reduce weight. The exhaust port of the engine is located in the center and has an oval shape, which is very comfortable.