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141 mm Q/R adaptor to allow the use of Elite direct drive trainers with Q/R BOOST rear ends. Replaces non-drive side axle cup designed specifically for the Direto-XR and Suito, will not work with Turbo Muin, Turno, Drivo or Original Direto.141 mm Q/R adaptor to allow the use of Elite direct drive trainers with Q/R BOOST rear endsReplaces non-drive side axle cupDesigned specifically for the Direto-XR and Suito, will not work with TurboMuin, Turno, Drivo or Original Direto