Extra large size Cat Running Wheel for larger BreedBigger is Better. The 120cm Cat Wheel, Engineered for Your Cat's Spinal Health. Not all cat wheels are created equal. Many standard models are too small, forcing your cat to run in an unnatural, hunched position, which can put dangerous stress on their spine and joints. We designed our premium exercise wheel to solve this problem because your cat's health is our top priority. That's why our wheel boasts a massive 120cm circumference, a size far