Replying to @Nettie Stowell Hello,thank you for your question,when the cat is running fast it does make some noise,in fact the bottom shaft is designed with silent pulleys which is not very loud under normal circumstances.this cat scratching mat is very esay to assemble also can be changed frequently,the wood used is also waterproof,overall it’s quite practical #catexercisewheel #catlover #cats #tiktokshop