size is one thing but like this mechanic when my 400cc bike fell
down, i tried to lift it back and had alot of difficulty. this
small 1.6m skinny MY technician just flipped it up like that!
so Chaar is a young qualified physical trainer that trains all day
long for years, know the concept of strength training inside out.
whereas im an IT geek, started training 3 years only with no
knowledge of weight training and late into my 30s. that fish monger
need to run his business, Taufiq need to work as a counsellor in
his day job etc. ok, Chaar beaten Elvin, that is a good leverage,
but not against a counsellor, a business man nor an IT guy.
but if there is an contest that do deadlift and configure an oracle
cluster on Unix machine, then i will definitely win! 
even if im betting, i would bet Chaar to defeat me and the rest
anytime.
for the weight of the tire, u can check with the manufacturers'
website. they do list the weight and diameters. Threading played an
important role but like i said before, if we 500lb deadlifters have
difficulties in the 260kg flip, i find it amazing that people that
deadlift 200lb+ can flip 250kg tire. im very puzzled.