For a light cassette, steel monoblock cassettes save weight, as they're mostly empty space. I just weighed an Edco 11-34 cassette I have, and it's 197g, which compares with 345g for the same size Ultegra cassette. The same size Dura-Ace comes in at 250g, but it manages that by using titanium for the large cogs, and they wear more rapidly than steel. [image: Dubied-monoblock-cassette-11spd_bottom[1].jpg] Nick Payne
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