• Don Gillies

    I think this is a 1976 or a 1978 model. I bought a 1977 model in 1977. Here is the 1977 catalogue cover (my catalogue). The bike in the foreground, with the black crankset and barcons, is the SEKAI 2500.

    – Don

  • Don Gillies

    In 1977, they upgraded this model to small-flange shimano-600 hubs (w/oilers), suntour cyclone gears with barcon levers, and the high-end maxy crank with black chainrings. the only SEKAI 2500 color available was flame red. This color (baby blue) was used for the 2700 model in 1977. Here is the 2700 catalogue page. Note that the 2500 and 2700 frames were the same, the 2700 just said “GT Deluxe” on the downtube. The catalogue page is wrong (note that the salesman wrote ‘blue’ in the 2700 catalogue page to make the correction) :

    http://www.ece.ubc.ca/~gillies/sekai/77_05_gt_deluxe.jpg

  • Don Gillies

    Despite the fact that this is SEKAI 2000 parts on a 2500 frame, I believe you have the grouppo almost correct. If I remember correctly, the main upgrade between 2000 and 2500 was the double-butted frameset, and lighter tires (1 1/8), today’s panaracer paselas in 27″ are probably the correct tires. The correct seat would be an Elina Pro that says “SEKAI” on it.