We live in Ms and mud ride a lot. I just got my RZR but had a Can-am before it so I ride a lot with the RZR 's . The best belt by far is a Polaris belt. They make two stock and a performance one. I ride with guy's that ride m hard and also race them. They have tried other belts like Dayco but they went back to the performance belts that Polaris makes. Stock belt about $80 and the performance one is about $180. Also Adam that owns Air Dam performance clutch uses stock belts