Shimano 600EX Ultegra Tricolour Front Hub

Shimano 600EX Ultegra front hub

Quick facts:

  • Model HB-6400;
  • introduced in 1988 and was the first time that Shimano used the word "Ultegra" in association with their 600 series groupsets;
  • weighs 137g;
  • uses a cup and cone bearing arrangement with 11 steel balls in each side;
  • has a steel thru axle, threaded all the way;
  • was available in 28, 32 and 36h versions;

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