Bought these to get better wheels than what came stock on my R6. My goal was having something more supple and soft to move better over harsh ground like gravel or rough concrete. Unfortunately the external "rubber" is the same quality as the original and is extremely hard, making this not an improvement over the stock. Overall quality seems otherwise good, but they added nothing imo. These are also rather pricey, keep in mind this measure is standard and you can surely find cheaper, softer alternatives at your local hardware store.