I use this: http://www.gibraltarhardware.com/?fa=detail&mid=1180&sid=363&cid=37
I don't weigh as much as you (85kg), but I guarantee it'll hold you. ;-)
I use this one, and I'm in your weight class.
http://drums-percussion.musiciansfr...741-ErgoRider-Throne-with-Backrest?sku=440486
Hey guys I really need a new drum throne because I was too heavy for my last one. I weigh in at about 273lb and I really need something that can withstand my weight.
It's a rather embarrassing situation, but I really can't stand using a folding chair...