Knolly,Knolly,Knolly..i never had a bike longer than a year until i got a Knolly.i,v now had it for 4 years.never had to change pivot bearings and i run my bikes on neglect. just in the process of getting a Chilcotin to go with the delerium. knolly recomend the air CCDB. the delerium weighs 38lb and as long as i,m feeling strong you can sprint in or out of saddle no probs,no bobs….now check all reviews of knollys then check the rest……also you never see a cracked knolly do you?