Cassette, Shimano 8 speed 11-34cs-13107BLK
8 speed 11-34
Too bad these are black, not shiny silver, but this is the only Shimano brand wide range 8s cassette out there, beggars can't be choosers especially at this great price.
Aug 23, 2017 - Oh, neat! Shimano now makes a fancier and prettier 8s 11-34 cassette in Silver, yay! Silver one has a little different cog configuration than the black (see below); Silver has smoother transitions between the lower (bigger) cogs.
Shimano CASSETTE SPROCKET, CS-HG50, 8-SPEED, 11-13-15-18-21-24-28-34T SILVER
Shimano CASSETTE SPROCKET, CS-HG31, 8-SPEED, 11-13-15-17-20-23-26-34T BLACK