That`s a good point about the Roly wheel or other, wider wheels allowing room for more than one mouse because they do love to run in tandem! Silent Spinners don`t allow the space for two sadly, but if your cage can accommodate more than one wheel, I supoose that`s a compromise.
Silent Spinners are quieter than Roly wheels though, but using a dab of vasiline on the spindle helps.
