praxis works aftermarket 11 40t quotwide rangequot 10sp mtb cassette for sramshimano mid or long cage rd only smaller cogs steel and upper cogs machined 7075 t6 aluminum hard anodized designed with goal of proper no sacrifice no compromise wide range 10sp mtb cassette for consumers shifting integrity was priority we did not want to be just another 39expanderadaptor39 that many riders are resorting to we wanted a full proper cassette weight is 322g works on any 10sp mtb