6 Ribbed Poly V Belt 50" Inch Micro Rib Groove Flat Belt Metric 500-J- 6

I have to keep the belt really tight so it does not slip, and it tends to jump out of groves, I worked maintenance most of my life and know how to align pulleys and chain drives. the slightest wear on bushings or bearings create problems, I never had problems with v-belts, why change a good thing, I don't know.

It worked like a charm