The belt sections for ribbed V-belts define critical dimensions of the belt ribs and of the pulley, including the rib spacing.
What do belt section designations mean for ribbed V-belts?
Pulley Groove - an overview
Belt (mechanical) - Wikipedia
Foundations SpringerLink
V-Belt: What Is It? How Does It Work? Types Of, Uses
ISO 9980:2012 - Belt drives — Grooved pulleys for V-belts (system based on effective width) —
Belt (mechanical) - Wikipedia
Foundations SpringerLink
Serpentine Belt Sizing - Auto Parts Professionals
Belt Length Calculator
What is the difference between a v-belt and a wedge belt? - Insight - Acorn Industrial Services ltd
English version - Tyma CZ, s.r.o.
Solved] The standard angle between the sides of a V belt is
V-ribbed belt / 1376 Ld / LS PLUS 70 / LS PLUS 80 / LS PLUS 90 / 87705737 / 504253015 /