The Roborock S81USP is a variant in Roborock’s premium S8 series, carrying the same core floor performance, HyperForce suction, rubber DuoRoller main brush, VibraRise mop lifting, that defines the lineup. For a robot running daily across varied floor types, the rubber main brush is the component doing the most direct work: it maintains floor contact across hard surfaces and carpet, agitates debris from pile without tangling long fibres around the roll, and determines whether suction finds and collects the fine particles that matter most for air quality. As the rubber compound ages under regular mechanical stress, that surface contact softens, and cleaning results reflect it in the form of missed patches and reduced pickup on textured surfaces.
This set contains Plus.Parts® rubber main brushes for the Roborock S81USP: 4 brushes in one order, enough for 2 full replacement cycles before restocking is needed. Each brush matches the S81USP’s roller dimensions and clip-mount system for a fast, tool-free swap. Compound selection prioritises durability through the full service window, so performance holds consistent from first to last session in each cycle.
The support team is available for any question about compatibility or your order, real people, personal responses, and genuine help when you need it.
At a glance
- Direct-Fit Compatibility – Roller dimensions and clip-mount matched to the Roborock S81USP for a straightforward installation that mirrors the original.
- Designed for Daily Use – Compound and construction suited to a robot running every day, maintaining floor contact and debris pickup across repeated sessions.
- Responsive Support – Reach the team directly with any compatibility or order question, every enquiry is handled by real people.







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