PepeM it is pretty low level and made in china of course so quality is well chinese.. rpenmanparker not sexist but bikexist I think this cassette was made for cruising amsterdam on gazelle at 15 km/h. I'm riding alot in the city, upshift, downshift and try to keep with the traffic not clog it like some so I guess that's what killed it but still thought it will last longer than 3 months.