Renthal – Renthal Chains, including R1 Works chains, R3-3 off-road and road chains, R4 and R4-2 SRS road chains, RR4 road chains, and R4 SRS ATV chains, is where the actual chain lengths live, listed by pitch and link count so you can order what your gearing needs. Racers chasing low rotating weight run the non-sealed R1 Works chain in 415-112L gold, 420-120L, and 520-120L. Riders who want sealed protection choose R3-3 in 520 with SRS rings at 114L and 120L for off-road and road duty, or step to the R4 family: 520-100L, 520-110L, 520-120L, 525-120L, 525-122L, R4-2 530-110L, and RR4 520-120L, with dedicated 520 SRS ATV lengths for quads. Getting pitch, link count, and sealing right is what makes a chain feel good rather than just last. Too few links and adjustment runs out early; too many and the chain slaps the guide. A sealed-ring chain holds its internal lubrication, resists mud and pressure washing, and keeps tension stable so shifts stay crisp and drive feel stays direct. A fresh, correctly specified chain also saves sprockets, which makes it one of the least expensive reliability gains available on any bike.