The default one were the dame brand as the bike. Never had any problem and they were very stable. Next i used those lock on, can't remember the brand but they had lots of lamellae very helpful during summer for the sweat but i think they lasted 2.000kms... until i decided to use the ones I mentioned above. The lock on with bolts yes they were stable but i had to cut down all 4 bolts because they were very oxidated and stuck as heck.