maintenance - 7-speed MTB cassette on 8/9-speed wheel hub, where does spacer go? - Bicycles Stack Exchange
Cassette How-To - Part 2 - Slowtwitch.com
Amazon.com : SHIMANO 11-Speed 1.85mm Low Spacer : Bike Cassettes And Freewheels : Sports & Outdoors
Issue with rear hub: installed an 11-speed cassette. Noticed it was loose after tightening. Took to bike shop. They added 2 spacers to eliminate rattle of the cassette. Now the smallest gear
Bike Freehub & Cassette Compatibility Manual
Quality 11 Speed Freehub Body Spacer for 10 Speed Cassette [FW0039]