Compatible with Narwal J4, Freo X Ultra, J4 Lite, and J5 robot vacuums Why you need this replacement wheel Restores smooth movement: The wheel rotates flexibly without jamming, so your robot can glide across hard floors and carpets and maintain consistent cleaning paths. Reduces interruptions and maintenance: A reliable wheel lowers the chance of stalls and uneven motion that cause missed spots or extra battery drain. Built to last: Made from materials that withstand the robot's weight and ongoing floor friction for extended use. Key features and benefits Direct fit: Designed to match the size and mounting points of the Narwal J4, Freo X Ultra, J4 Lite, and J5 models so it fits snugly to the robot body after installation. Stable operation: Provides sturdy support that prevents wobbling during operation, keeping brushes and sensors aligned for uniform cleaning. Smooth rolling performance: Flexible rotation improves tracking across transitions (hardwood to carpet) and over small obstacles, delivering more complete coverage. Practical use scenarios Moving between rooms with different floors: Keeps the vacuum rolling smoothly from tile or hardwood to low or mediumpile carpet without getting stuck. traffic homes and pet environments: Handles repeated passes and friction in areas with frequent cleaning needs, helping the robot maintain reliable motion over time. Cleaning under furniture and across thresholds: The wheel's stable support and flexible rotation help the robot navigate small height changes and tight spaces without wobble. What to expect after installation A snug, secure fit that restores stable, predictable movement Fewer motionrelated interruptions and more consistent cleaning performance Compatibility reminder Compatible with: Narwal J4, Freo X Ultra, J4 Lite, and J5 robot vacuums.