Shark publishes original side-brush identifier 1171FK870 and explicitly names RV750.
What is actually verified
The records below describe the manufacturer-listed original items, including exclusions. They are not tests of unnamed third-party products. An aftermarket listing has to be checked separately against the exact model code RV750 and the original identifier.
FitsOfficial manufacturer listing
Shark ION Robot side brushes, 4-pack
Original category schematic, not a product photograph or dimensional fit diagram. Match the exact item in the linked manufacturer listing.
Fits. Shark explicitly names RV750 on the 1171FK870 supported-model list. Preserve the _N or regional suffix; the record does not automatically cover a similarly numbered model without that suffix.
Compare the listing claim with the original record
Check
Original manufacturer evidence
What to require from an aftermarket listing
Robot identity
Shark ION RV750 · RV750
Complete model and all suffixes, not only the brand.
Part identity
Exact published identifier or clearly labeled bundle component above.
Actual item identity and a written reference to the original; a borrowed photo is insufficient.
Scope and exclusions
Preserve the _N or regional suffix when the seller names another numbered robot.
Written confirmation of the same generation and caveats; omitted exclusions remain unverified.
Performance
No VacPartFit physical test claimed.
Independent test evidence for filtration, pickup, noise or durability claims.
Returns
Check the current manufacturer store terms.
Check seller returns before opening or fitting the replacement.
When the cheaper pack is difficult to compare
Require the same original reference and supported model list; similar brush arms cannot substitute for the hub identity.
The attachment point matters more than the number of arms. Check whether the brush uses a screw or a push-fit hub, the shape of its center and the manufacturer's part identifier. Three-arm and five-arm brushes can look interchangeable while belonging to different drive modules. Keep any module-version caveat on the official listing with the fit decision.
With the robot powered down, inspect the user-removable brush for wrapped hair, damaged arms and a cracked hub. Use the removal method in the model manual. A push-fit brush must seat normally; a screw-fit brush should not require a substituted screw or extra force. A brush that still stalls after cleaning needs further manufacturer diagnosis rather than repeated replacement purchases.
Decision before buying
Use the original record as the identity reference. If the seller cannot substantiate a conflicting model or part number, leave that aftermarket relationship unverified and seek a documented match. A manufacturer fit label does not establish seller authenticity or comparative product performance.
