Bumper plates are for people who drop the bar: cleans, snatches and failed reps, on a floor you would rather not crack. Crumb rubber over a steel insert absorbs that impact.
Olympic Bumper Weight Plates use a machined Olympic 2-inch bore and a uniform 450mm outer diameter across weights, in black rubber with a steel centre. Pairs run from 1.25kg to 25kg; graded sets run from a 30kg set to a 150kg set. There is also an Olympic Bumper Weight Plates Pro Set. Thinner iron for max load on the sleeve is under cast iron plates. Bumper sets are heavy; free delivery across Great Britain (Scottish Highlands and Islands included) is included on every order.