The inside diameter is 12 inches and the running surface is 5 inches wide. Please check photos carefully. The wheel is very silent and very sturdy.
The wheel is made from Acrylic and are 2 pieces glued together a.k.a "welded" so it does not separate making the whole wheel as a 1 piece. The wheel is hedgehog safe and will not get their nails stuck or anything.
All-in-1 wheel. It can be used for different sized hedgehogs and other small animals such as Syrian Hamsters. Great for aging animals and animals with leg problems as well as Chonky and Obese hedgehogs 650g+). The bonus in this wheel is that animals just need to walk in and out and not life their legs as much so less stress in the legs.