TREADMILL WHEEL (11 INCH) (152 ratings) It's a sturdy excercise wheel made of metal to promote longevity! R1100.00 Quantity: at R1100.00 each Add To Basket This Wheel is very sturdy and is about 28cm in diameter. It has a track that is about 9cm wide. Don't forget to measure your cage door opening to make sure this wheel will fit your cage. Each wheel is very quiet and has small ridges on the track for added grip. The Treadmill Wheel does not have a cage mount so it needs a flat surface in order to work correctly.