I just purchased a brand new 20" XZ MBT and there is an annoying creaking coming from the back of the bike when I standup and hammer up a hill. I assumed at first it was the new wheels settling in but i am convinced its not that. I suspect its the lower pivot arm barring near the hub. Do i need to lube any thing?
Also, is it normal that the seat stay pivot arm rubs against the seat tube on one side?