Bill, i don't think it's the weight you need to worry about it's the length. I just put my 18.5 lber on the top rack and it used up every bit of it.So when i get them from here on out i'm taking a tape measure with me cause i don't want to have to cut it down to fit. Went to bj's tonight to pick up some spares and they had a 24 lber there that was the same length as my 18.5. The Guru is chugging along it seems pretty cool so far. Filled up the ring with Royal Oak lump and 5 Chunks of Pecan and 3 Cherry. The guru looks pretty neat at night glowing in the dark. Bryan