The Pendlay Elite Black Bumper Plates feature a flawless surface with custom print that is done at our Fort Mill, SC printing facility. We guarantee that these plates are within 10 grams of claimed weight. All plates are weighed on highly sensitive calibrated scales and marked with their weight prior to shipping. If a plate does not conform, it does not ship. We choose to print these plates in our Fort Mill, SC facility because of two reasons. We can control the quality of the print and the quality of the ink. We use a highly specialized ink formulated to adhere to this specific material. The collar opening allows for a snug fit on the bar* eliminating the loose fit bumpers can have. The hardness of the material is ideal to the olympic weightlifter's preference. When dropped these plates dead blow with little bounce. Nothing is more annoying than "chasing" bumper plates that bounce all over the platform. |
Plate diameter: 450mm (IWF Standard is 450mm)
Collar opening: 50.40mm*
Insert type: Steel disc, zinc plated
Weight tolerance: +/- 10 grams of claimed weight
Coloring: A (graded: A through F)
Classification: High Grade Bumper Plate
Material: Virgin Rubber, Rubber Additives, and Steel
Origin: Made in China, Printed in South Carolina
*MuscleDriver USA only guarantees that bumpers plates will fit properly on Pendlay Bars, York Bars, Rogue Bars and all IWF certified bars. Low end bars are not manufactured with strict tolerances for the collar diameter. Collar diameter for quality bars is in the range of 49.70mm-50mm. Pendlay Bars are an exact 50mm which conforms with IWF requirements.
|What is a Shore Durometer reading? |
|Shore Durometer is one of several measures to test the hardness of a material. Hardness may be defined as a material's resistance to permanent indentation and total failure (examples of total failure; insert coming out, rubber seperating, plates warping). We consider anything over 65 acceptable for a quality bumper plate. The maximum reading we have tested on a bumper plate is 96 (CAP 10lb). The overall maximum reading that can be achieved is 100. Higher reading bumper plates are likely to resist indentations and total failure than lower reading bumper plates. |
We understand there are many ways to define the quality and cosistency of bumper plates. However, we feel that this type of testing is statistically valid and objective.
Elite Black Durometer Reading Statistics
(from a random sampling of 20 plates)
Average Durometer Reading - 90.07 (excellent)
Durometer Range - 2 (excellent)
Durometer Standard Deviation - 0.73 (excellent)
High durometer readings indicates a high material quality. Low numbers for the durometers range and standard deviation indicates consistent manufacturing.