Each batch of 25LB - 55LB wright bumper plates are tested to exceed 20,000 drops from 6 feet. Weighing within +/- 0.5LB of the stated weight. I'm very impressed with these plates, and hope they will get many years of use. All plates are a true 450 mm diameter with a 2' stainless steel center insert shaped to the bumper to properly distribute the force of the bar when dropped. Very impressive that each pair exactly matched in weight. USA Barbell 45lb Olympic Crumb Bumper Plate - American Made Recycled Rubber Weight Plate - Single 45 Pound Plate, Black 79.99 13. So the scale itself was measuring consistently. I weighed each plate three times, and got the same reading for each plate, on each measurement. However, my goal was to see if the pairs were actually within tolerance when compared to each other, and therefore if the scale consistently showed the same weight for each plate, I could verify where the plates were relative to each other. Now, I will note that I didn't have a lab calbration weight, to verify the the scale's zero, and accuracy. After unboxing the weights I put them on a scale. Not necessary, but a nice feature that other "crumb" bumpers don't offer. I like that these have the color "flecks" to quickly which plate you're grabbing. Coloured flecks have been added for the rubber to Olympic colour code the plates, allowing you to identify the plates you are lifting more easily, helpful in a. I will do a separate review of the barbell later. I ordered the package deal including a barbell, and the 201# set (2x25#, 2x35#, & 2x45#), as the price was good, and I could see what the bumpers were like before buying more. XM Fitness Crumb Bumpers Sold in Pairs The next step in evolution of the Bumper Plate Crumb Rubber has the ideal durometer rating to absorb bounce and. Barbell Pads with Straps (Presale - Ships By June 15th).Bench Attachments (Leg Curl/Leg Extension and Buzzsaw Adaptor Presale - Ships By June 15th).Adjustable Utility Bench (Presale - Ships by June 15th).Deadlift Jack (Presale - Ships by May 19th).Wildman Adjustable Kettlebell (On Backorder). EZ Curl Bar – 47″ (Presale - Ships by July 12th).
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