【Get the same effect as Speed Master bearings at about 1/3 the cost!】 TAMA HP50, while labeled as "The Classic Pedal," is a fine model that incorporates new ideas in various places, but unfortunately, the spring roller is made of the old-fashioned resin ring. In fact, the part with the greatest friction resistance in a drum pedal is this spring roller section, and by using a bearing here, the pedal's movement will be dramatically improved. So, you might think of installing Canopus Speed Master bearings (formerly Speed Star bearings)... but currently, Speed Master bearings compatible with HP50 are not available. That's why we created these grooved bearings. They have a simple shape, just a groove cut into the outer ring of an NSK stainless steel bearing, and they don't have a heavy bearing holder like Speed Master bearings, so the inertia is small, and the movement is more agile. Compatible with the following models: TAMA HP50 ★Here's a comparison video before and after the replacement. https://youtu.be/tpSYGfZC9Vw?si=YxT03bTOWDmr2Xtb ●If you want multiple pieces, please comment. speedstar bearing speedmastar bearing