The lower roller and shaft was very worn after 8 yrs. I ordered a new shaft and replacement rollers. Since two rollers came with the kit, I replaced both the upper and lower roller. The only trouble I had was during reassembly and keeping the tensioner in place when fitting the door back on the drum. In addition, when the rollers were shipped, the packer cut the bottom of the plastic bag and one of the triangular retainers was missing as well as the locking washer for the shaft to keep the bracket in place. Luckily I had ordered an extra triangular retainer and I reused the old locking washer