Amazon.com : Juscycling Spacer Washer for Flywheel Cassette MTB Road Bike Bicycle Hub 7/8/9/10/11S, Various Size Options of 1/1.5/2/1.85//2.18/2.35mm (1 PCS of 1.85mm) : Sports & Outdoors
Shimano-1.85/2mm Bas Entretoise for 10-Speed de Cassette & 11-Speed Moyeu Libre | eBay
Shimano 1.85mm Freehub Cassette Sprocket Spacer (10 speed to 11 speed) for Bicycle and Cycling, Sports Equipment, Bicycles & Parts, Parts & Accessories on Carousell