Compatibility: Direct replacement wheels for models 11S, 30, 30C, 15C, 12, 25C, and 35C. Wheels are the same size as the originals for seamless fit and straightforward swap. Why you need them: Worn or cracked wheels reduce suction efficiency, cause slipping, and can make your robot vacuum get stuck. These replacement wheels restore smooth mobility so your vacuum can reach all areas and clean efficiently again. Durable rubber construction: Made from wearresistant rubber that outlasts ordinary plastic wheels. The nonslip tread improves traction on hardwood, tile, and carpeted floors, reducing skidding and improving navigation. Ready to install: No tools required. Remove the old wheels and press the ones into place to quickly your robot vacuum to flexible movement. 360° universal swivel with precision bearings: Smooth, fullrange rotation helps the robot steer accurately, avoid jams, and maneuver around obstacles so cleaning reaches corners and tight spaces. Key attributes at a glance: Function: Restores mobility and steering performance Compatibility: 11S, 30, 30C, 15C, 12, 25C, 35C Size: Same as original wheels for plugandplay installation Material: Wearresistant rubber Performance: Nonslip grip, smooth 360° swivel, reduces jamming Use scenarios: Living room cleanup: worn wheels to help the robot transition smoothly between hardwood and area rugs while picking up dust and pet hair. Underfurniture and tight spaces: Improved swivel and traction let the vacuum navigate under sofas and between chair legs without getting stuck. traffic areas: Durable rubber resists wear from daily use so the robot maintains consistent movement across entryways and tile floors. Simple to fit, built for better traction and reliable maneuvering — a practical replacement to keep your robot vacuum operating as intended.