Sure they are nice and have really good reviews since they came out …but the question is … Why Iwonder did not built and designed around the same interface or adaptor …???? In other words proprietary design, doesn’t allow this wheel to be used with other type of motor, like direct drive motors … I would like to see compatible wheels from the same brand …anyhow they look very nice 👍🏼 In other words, cloud wheels, rovers, should be compatible…both have different cores .