Review on Prime Line Products 7228 Outside Diameter: Unbeatable Quality and Performance at its Finest by Joseph Hall

Bought 2 packs (4 total) replacement rollers for the Tunturi R215 rowing machine which native rubber roller wheels had rotted. They seem great for this purpose, although they're a bit smaller than the original and make more noise when rowing (because they're hard plastic and not soft rubber). The shaft is smaller than the original so I just made sure the seat was all the way down before tightening each nut. I also added a #10 washer under each nut just to make sure the nuts don't come loose.